SMAW Welding Meaning: What It Is and How It Works

You are on a jobsite at 6 a.m., the foreman hands you a 3/32-inch rod and says “run a stringer bead down this bracket before we set the beam.” The box in your hand says E6013, but you have no idea what that code means, what polarity to plug in, or why your last three beads kept sticking to the steel. This is the moment almost every new welder meets shielded metal arc welding. Understanding what SMAW actually is — and what the numbers on that rod mean — turns a guessing game into a craft you can control.

What Does SMAW Welding Mean? The Straight Answer

SMAW stands for Shielded Metal Arc Welding. It is the formal process designation used by the American Welding Society (AWS), and the process most people know as stick welding. It also goes by manual metal arc welding, or MMA, in British and ISO-style terminology. On plenty of job sites the plainest name of all is just “arc welding.”

Physically, here is what happens. You clamp a workpiece lead (the work clamp, often called the ground clamp) to the steel you are joining, then plug a flux-coated consumable electrode, usually a 3/32 or 1/8 inch rod, into an electrode holder. Touching the rod to the base metal and lifting slightly strikes an electric arc. That arc melts the tip of the rod and the surface of the plate at the same time. As the coating burns away it decomposes into a shielding gas cloud and a layer of slag, and both protect the molten weld pool from the air. You then travel the arc along the joint by hand, building a bead one molten inch at a time.

AWS has called SMAW the “grandfather of welding” because of how long it has been in continuous industrial use and how little its basic principles have changed. The Washington State OpenWare welding course materials describe it as one of the oldest and most widely used arc welding processes, which is why you still see it on shipyards, pipelines, farms and structural steel jobs today.

Why “stick”? Because that coated rod looks exactly like a glue stick. The nickname stuck long before anyone wrote an acronym for it, and if you have ever held a 36 pound box of E7018, you know exactly what they mean.

What the process is really made of

SMAW is remarkably simple in hardware terms. The whole setup is four things:

• Power source — a constant-current (CC) welding machine. CC means the amperage stays put and the voltage floats, so arc length controls the heat input rather than the amperage dial.
• Workpiece lead — the heavy clamp that grips the base metal and completes the circuit.
• Electrode lead — the lead and holder combination, sometimes called the stinger or the whip.
• Coated electrodes — the consumable rods themselves, flux coated and baked.

There is no gas cylinder, no wire feeder and no spool. Everything else is your own hands. This is a manual process in the truest sense: you control bead size, shape and travel speed entirely by hand, and no machine setting can do it for you. The AWS Welding Digest guide to making a quality shielded metal arc weld makes the same point, that consistent technique matters more than any piece of equipment you can buy.

The naming landscape, cleaned up

Most confusion about “smaw welding meaning” comes from mixing four terms that are not interchangeable.

One more name causes real confusion on job sites. FCAW-S, flux-cored arc welding using self-shielded wire, feeds a stick-like wire through a gun that looks nothing like a manual electrode holder. It is a separate AWS process designation, not a flavor of SMAW. The critical difference is shielding: FCAW-S protects the pool with the flux core alone and needs no gas cylinder, while SMAW uses a flux coating on a consumable rod that melts into the puddle. The advantages of stick welding explained covers more on where SMAW still wins over its faster cousins.

What this article covers

With the name settled, the rest of this guide walks through the process from arc strike to finished bead, the history of the coated electrode, how to decode a classification like E7018 or E6013, how to pick an electrode and set the machine, technique and troubleshooting, how SMAW compares to MIG, TIG and FCAW, and where to start practising. If you would rather start at the arc, the site’s companion all position welding rod guide walks you through your first bead and helps you pick a rod before you strike.

How the Stick Welding Process Actually Works, From Arc to Bead

Shielded Metal Arc Welding (SMAW), more commonly known as stick welding, is a manual process that relies just as much on the welder’s hand as it does on the machine. Unlike a MIG gun that feeds wire continuously, every inch of a stick weld is controlled by strike, arc length, and travel. With that in mind, here’s what actually happens from the moment the rod touches steel to the finished bead.

The Setup: Four Key Components

Regardless of size, any stick welding setup will consist of the same four pieces:

• Power source: A constant-current welder. Rather than forcing a set voltage, it holds amperage steady and allows voltage to float as arc length changes.
• Electrode holder (stinger): An insulated, spring-loaded clamp that secures the rod and protects the welder’s hand from heat.
• Work lead and work clamp: The return path for the circuit. While many shops call it a “ground clamp”, this is a misnomer. It should only be attached directly to the workpiece, never to a grounded pipe or vehicle frame. Attaching it elsewhere can create unwanted arc paths and serious hazards.
• The electrode: The consumable stick rod that provides both the filler metal and the flux coating.

The Electrode: More Than Just Filler

Most SMAW electrodes are between 9 and 18 inches long, with diameters ranging from 1/16 inch to 1/4 inch. Beneath its flux coating, a solid steel core will melt and become the filler for the joint. The baked-on flux is what allows the process to run without a shielding gas bottle, and it performs four vital jobs all at the same time:

1. Self-shielding gas: When heated, the flux decomposes and releases a gas cloud that pushes oxygen and nitrogen away from the molten metal.
2. Slag formation: The spent flux floats over the puddle as a glassy blanket, insulating the weld, influencing bead shape, and solidifying for removal by chipping.
3. Deoxidation: Elements such as silicon and manganese pull contaminants like sulfur out of the weld and trap them in the slag.
4. Arc stability and wetting: Arc stabilizers keep the arc consistent, while fluxing agents help the molten filler wet into the base metal rather than balling up on its surface.

As outlined by the process fundamentals in the open welding textbook, this chain of decomposition, shielding, transfer, and slagging is the backbone of the process.

Arc Heat and Constant-Current Control

The arc itself burns between roughly 6,000 and 11,000 degrees Fahrenheit (3,316 to 6,093 degrees Celsius). With a constant-current machine, amperage stays fixed while arc voltage changes based on arc length. This creates a direct relationship between the gap and heat input:

Arc voltage	Amperage	Arc power
20 V (very short arc)	96 A	1,920 W
24 V (normal arc)	80 A	1,920 W
30 V (stretched arc)	64 A	1,920 W

In other words, stretching the arc cools and narrows the puddle, while forcing it short drives more amperage to it and risks burn through. On North American AC transformers, the polarity reverses 120 times per second at 60 Hz, allowing many of these machines to run stick with no rectifier.

Striking, Cratering, and Arc Blow

To start, a welder can use a scratch start (rubbing like a match) or a tap start (tapping down like a pool cue). Once established, the goal is a short, steady arc. As the electrode burns down, it must be fed into the puddle at a rate that matches consumption.

Ending a weld is just as deliberate. Instead of pulling away the moment the joint ends, the crater must be filled by pausing briefly to let the last of the molten metal solidify with the puddle. Pulling off too fast leaves a thin, ragged tail. This step is heavily emphasized in the AWS guide to making a quality shielded metal arc weld for good reason.

At times, the arc may deflect to one side, spit, or bite an edge of the joint. This is arc blow, caused by the magnetic field created by current flowing through the arc. DCEN tends to be less prone to it than DCEP, and keeping the work in a single plane with good lead placement can help. While full troubleshooting belongs elsewhere, understanding this as a physics issue is key to identifying it when it happens.

All of these elements are exactly why, despite being slower than many modern processes, stick welding remains such a staple for the advantages of stick welding in field and repair work.

A Short History of SMAW: From Kjellberg’s Coating to the Modern Shop

Ask a shop foreman why we still use a process invented before electricity reached most homes and you get a shrug: it works, it travels, it never needs a gas bottle. The history explains why it looks the way it does.

The first real arc welding process came out of France in the early 1880s, built by Auguste de Meritens. He used consumable carbon electrodes on direct current negative polarity (DCEN) to join metal, powered by a motor-driven generator. A genuine process, but not one that produced trustworthy joints yet.

Later in the same decade, de Benardos and Olszewski refined it in familiar ways: a handheld electrode holder so the consumable could be moved by hand, plus a switch to direct current positive polarity (DCEP). That is essentially a modern stick setup, holder in one hand, work clamp in the other.

Then came the problem that stalled the technology for twenty years. Carbon electrodes contaminated the weld metal, and the joints were brittle. The fix: use a metal electrode. Nikolay Slavyanov made that change in 1888, and Charles Coffin did the same independently in 1889.

Bare metal electrodes brought their own headache. With nothing between the arc and the atmosphere, air oxidized the molten pool: steel that would not hold a slag, a puddle that sputtered and pitted, welds that leaked. The missing ingredient was shielding, and on a remote jobsite in 1900 that meant a gas cylinder at every job.

Enter the fix. Oscar Kjellberg of Sweden and Arthur Percy Strohmenger developed the first covered metal electrodes, a metal rod wrapped in a coating of powdered compounds. Strohmenger’s heavily coated electrode, patented in 1912, produced the first clean welds with good mechanical properties. It did several jobs at once: it generated a protective gas cloud, left a slag blanket that shaped the bead, and fed deoxidizers into the pool.

Coating technology had its own breakthrough in 1927, when an extrusion method arrived. A hydraulic press forced the compound onto the wire cheaply. Production jumped, prices fell, and the process spread fast. World War II finished the job: covered-electrode welding became the dominant joining method in shipbuilding, vehicle manufacture, oil refineries, railroads and pipelines. Liberty ships, tanks and pipeline joints were all done with a coated rod and a generator.

Milestone	Who and When	Why It Mattered
First arc welding process	Auguste de Meritens, early 1880s	Proved the arc could join metal
Handheld holder and DCEP	de Benardos and Olszewski, late 1880s	Made the process operator-driven
Metal electrode replaces carbon	Nikolay Slavyanov 1888, Charles Coffin (USA) 1889	Ended carbon contamination
First covered metal electrodes	Oscar Kjellberg (Sweden), A.P. Strohmenger (USA), early 1900s	Electrode carried its own shielding
Heavily coated electrode	Strohmenger, 1912	First clean welds with good properties
Extrusion coating process	1927	Coated electrodes became cheap and fast

The striking part is that the basic principles of SMAW have not changed in more than a century. An arc is still struck between a flux-coated consumable electrode and the work, and the coating still protects the pool. What improved: electrode alloys, coating chemistry, and power sources. Modern inverter machines give hot start, arc force and better control than the 1940s generators, and AWS’s guide to making a quality shielded metal arc weld still describes the sequence a shop used in 1945.

Where Stick Welding Lives Today

In high-volume production, SMAW has been pushed aside by faster processes, particularly flux-cored arc welding, where continuous wire feeds faster at higher deposition rates. But stick is not a legacy curiosity. It remains standard in shipbuilding and structural construction, the backbone of pipeline work, a staple in agricultural equipment and heavy machinery, and the standard fix for machine and mobile repair, like welding a bracket on a trailer at the roadside.

Carbon arc technology is not entirely dead. It survives in air arc welding and carbon arc gouging, where a carbon electrode cuts or gouges metal rather than joins it.

And an application remains uniquely SMAW’s own: underwater wet welding. Because the coating supplies its own shielding, a diver can light an arc feet below the surface with no gas cylinder, no hose bundle and no bubble-tight habitat. No other process can make that claim.

For a plain-English look at why this process outlasted its rivals, see our breakdown of the advantages of stick welding, and for the shipyard end of the story, read about processes and standards in professional marine welding.

Decoding SMAW Electrode Classification: What E7018 and E6013 Actually Mean

Once you know the basics of stick welding, the next skill to pick up is reading the rod box. The numbers and letters printed on an SMAW electrode aren’t a brand name, they are an AWS classification that tells you its strength, the positions you can weld in, the type of flux coating it has, and the polarity it requires. Learning to read them will save you from countless stuck rods and failed welds.

The Breakdown Of An AWS Electrode Code

Every standard SMAW electrode starts with the prefix E, which simply means “Electrode”. From there, the code is broken down in a set order:

1. Tensile Strength: The next two or three digits represent the minimum tensile strength of the weld metal in the as-welded condition, measured in thousands of pounds per square inch (psi). For example, E60xx is rated for at least 60,000 psi, E70xx for 70,000 psi, and E110xx for 110,000 psi.
2. Position Digit: The third digit from the start (or the digit after the strength number) tells you which welding positions the electrode is approved for. 1 means all positions, 2 means flat and horizontal fillet only, and 4 means all positions with vertical-down only. Keep in mind that digit 3 is obsolete and unused.
3. Flux Coating and Polarity: The final digit is arguably the most important for your machine setup. This number indicates the flux coating type and the required or recommended polarity to run the electrode correctly.
4. Suffix: Any letters after these numbers, such as H4R, are additional designators that give extra information about the electrode’s characteristics.

To put this into perspective, here is the general minimum strength breakdown for these classifications:

Classification	Minimum Tensile Strength	Minimum Yield Strength
E60xx	62,000 psi	50,000 psi
E70xx	70,000 psi	57,000 psi
E80xx	80,000 psi	67,000 psi
E110xx	110,000 psi	95,000 psi

Understanding The Flux Digits

With so many rods on the shelf, the last digit is your key to matching an electrode to your machine and your weld. The most common ones that you’ll run into are as follows:

Last Digit	Flux Coating	Recommended Polarity
0	High cellulose sodium	DCEP
1	High cellulose potassium	AC / DCEP
2	High titania sodium	AC / DCEN
3	High titania potassium	AC / DCEP / DCEN
4	Iron powder titania	AC / DCEP / DCEN
5	Low hydrogen sodium	DCEP
6	Low hydrogen potassium	AC / DCEP
7	High iron oxide	AC / DCEN
8	Low hydrogen potassium with iron powder	AC / DCEP / DCEN
9	Iron oxide titania potassium	AC / DCEP

Knowing these numbers is especially useful when cross-referencing with resources, such as an all position welding rod guide, to ensure your rod matches the work at hand.

The Three Electrodes Every Beginner Meets

While there are dozens of rods out there, most welders learn their craft on three in particular. Each one has its own personality, so knowing when to use them is vital.

• E6010: A cellulose sodium rod (digit 0), meaning it’s DCEP only. It produces a digging arc with deep penetration, a rough bead, and fast-freeze solidification. This aggressive arc allows it to cut through rust, mill scale, and light contamination, making it the standard for root passes and, most notably, for underwater welding.
• E6013: A titania potassium rod (digit 3), compatible with AC, DCEP, and DCEN. It runs with a soft arc, little penetration, a wide and smooth bead, and a heavy slag. These traits make it incredibly forgiving, perfect for sheet metal, light brackets, and practice on cleaner steel.
• E7018: A low hydrogen potassium with iron powder rod (digit 8), compatible with AC, DCEP, and DCEN. This is the structural workhorse. It provides a soft arc, moderate penetration, and weld metal with high strength and ductility. Due to its low-hydrogen flux, it requires a rod oven for proper storage to prevent moisture pickup.

When looking at an E7018 box, you may see suffixes such as H4, meaning the electrode contains no more than four parts per million of diffused hydrogen, or R, indicating that the electrode meets absorbed-moisture test requirements. These are not buzzwords, but quality indicators that are often required when referencing standards such as those found within shielded metal arc welding fundamentals.

At the end of the day, the code on your rod is a contract of its capabilities. Learning to decode it will allow you to pick the right electrode for the job, dial in your machine properly, and lay beads with purpose, rather than guessing. That alone is one of the greatest leaps that a beginner can make within the trade.

Choosing the Right Stick Electrode and Setting the Machine Correctly

Reading the classification on a rod box tells you what the electrode can do. Knowing which rod to grab for the job in front of you, and what amperage to set, is what actually moves the project forward. A weldment fails in the classroom for lack of knowledge, but in the field for lack of judgment about filler, heat and setup.

Match the Filler to the Base Metal, Every Time

Weld steel with a steel electrode, stainless with stainless, and aluminum with an aluminum process. A dissimilar filler on carbon steel creates a galvanic couple that corrodes faster than the surrounding metal and eventually undercuts the joint from the inside, and it changes the mechanical properties of the deposit in ways nobody wrote a procedure for.

Dissimilar metal welding is the deliberate exception, where filler and procedure are chosen to give an acceptable galvanic series relationship. For stainless work, E308L electrodes join stainless to stainless, while ENiCrFe-2 nickel-iron-chromium electrodes handle stainless-to-carbon-steel or stainless-to-nickel work. Never guess here. Stainless-to-carbon transitions often need buttering or a nickel alloy filler depending on service temperature and corrosion service. The alloy steel welding electrode guide covers the families beyond plain carbon steel.

The Practical Selection Logic

Most shops run on four or five rods, and each coating maps to specific positions.

• E6013 for thin sheet, light brackets and dirty steel. The titania potassium coating gives a soft, forgiving arc, a wide smooth bead and good penetration into mild rust and mill scale. The general-purpose beginner and hobby rod, running on AC, DCEP or DCEN.
• E6010 for root passes, tacks, and rusty or painted surfaces. The high cellulose flux burns off with a digging, forceful arc that penetrates deeply and drives contamination out of the joint. Cellulose flux is less affected by surface contamination than low-hydrogen types, which is why it is standard for dirty pipe and structural fit-up. It runs on DCEP, wants more amperage, and is the standard all-position rod choice for underwater wet welding.
• E7024 and E6020 for flat and horizontal fillet work with heavy deposition. The high iron oxide coating gives a fast freeze rate and an excellent fillet cap profile, so production shops running fillets across plate reach for these. Not suited to vertical or overhead work.
• E7018 for structural steel, pressure work and anything governed by a code. Low hydrogen potassium with iron powder, strong and ductile deposits, and the default for structural fillets, pipe and qualified procedure work. It requires a rod oven.

Amperage: The Chart Is a Starting Point, Not an Answer

Manufacturers publish a recommended range for every diameter. A 1/8 inch E7018 is rated for roughly 90 to 160 amps. That number is a boundary, not a target, and base metal thickness overrides the chart most of the time. The same rod on 1/4 inch plate lands around 110 to 125 amps, because the plate demands the heat, and 160 amps on 1/4 inch plate risks burn-through and excessive penetration. Thin material pulls the setting down, thicker pushes it up.

Too much current gives a wide, flat, fast bead with undercut at the toes, heavy spatter and burn-through risk on thin steel. Too little gives a tall, narrow bead with poor penetration and constant sticking. Start in the middle of the range and adjust by feel.

Polarity Comes Straight From the Classification

Look at the flux digit. If it specifies a polarity, that is the polarity you use. E6013 works on AC, DCEP or DCEN, so you can run it on whatever your machine offers. E6010 specifies DCEP, meaning the holder goes to positive and the work clamp to negative. E7018 is low hydrogen potassium and works on AC or DCEP.

Get the polarity backwards and the electrode does not behave like the rod you bought. An E6010 on DCEN will gouge, spatter and spit, and you will waste the rod blaming the machine. If the arc sounds wrong and the bead looks wrong, check polarity first. The Washington State open welding textbook chapter on SMAW covers polarity and electrode handling in detail.

Equipment Setup: Check the Circuit Before You Strike

Most beginners set the amperage and start welding. Experienced shops check the whole circuit first, because the arc only performs as well as the path it flows through.

1. Check lead, holder and clamp ratings. Holders and clamps come in rated sizes, commonly 200 amp and 400 amp, and they must match the amperage in use. Pushing a 400 amp machine through a 200 amp clamp overheats the insulation.
2. Inspect the work clamp. A worn or damaged clamp adds resistance to the welding circuit. That resistance generates heat, which can burn skin when you grab the clamp to reposition it, and it degrades arc performance. Clean the jaws and the mating surface on the workpiece before clamping up.
3. Check the service power. Most production welding systems require 220/240V, or even 440/480V, service. Even on a 120V small machine you may need a 20 amp breaker minimum. Running a 250 amp machine on a household circuit trips the breaker or drops voltage, and a sagging supply produces an erratic arc. The AWS guide to making a quality shielded metal arc weld covers machine setup in more detail.
4. Store low-hydrogen rods dry. E7018 and other low-hydrogen electrodes must be kept in a rod oven. Atmospheric moisture saturates the flux, and the hydrogen it carries promotes cracking in the deposit. Once a box has been open for days, treat it as suspect regardless of the print date.

For a welder starting from zero, a multi-process machine with a stick setting is the cheapest way to add SMAW capability, since the same box handles MIG and TIG later. Use the site’s stick welding electrode buying guide to narrow the rod choices before you spend anything.

SMAW Technique: CLAMS, Reading the Weld Pool, and Avoiding Defects

Ask any shop foreman how they teach a new welder to run a stick and you will hear the same answer: watch the puddle. Not the amperage dial, not the machine knobs, the puddle. It is the only part of the process that talks back to you, and reading it well separates a welder who fills a crack once from one who fills it three times. Shops organize that reading with a framework called CLAMS: Current, Arc Length, Angle, Manipulation and Speed. Master those five and stick welding stops being guesswork. The AWS guide to making a quality shielded metal arc weld covers the same ground from a code-focused angle.

Current: Too Low, Too High

Current sets how much heat the arc delivers and how hard it bites into the base metal. Set it too low and everything complains at once:

• A narrow bead with a high crown, a humped ridge
• Shallow penetration into the plate
• An arc that is hard to start or hold
• Sputtering and a rod that keeps sticking

Set it too high and you get the mirror image:

• A wide, flat bead with little reinforcement
• Excessive penetration, or burn-through on thin material
• Heavy spatter off the joint
• Undercut at the toes, where bead meets plate
• An arc that digs so hard it blows through
• An elongated, teardrop-shaped pool, not a tight oval

The amperage range printed on the electrode box, and standard references such as the SMAW chapters in this open welding textbook, give a starting point. Plate thickness and joint design get the final say.

One variable sits alongside current on modern machines: arc force, sometimes called arc dig. It changes the stiffness of the arc column, making the puddle easier to see and control. It does not measurably improve penetration, so treat it as a handling aid, not a way to get deeper fusion.

Arc Length: Roughly One Electrode Diameter

Arc length is the gap between the electrode tip and the work. For most electrodes it should be roughly equal to the electrode diameter, so a 1/8 inch rod wants about a 1/8 inch gap. Too long and the pool turns hot and fluid, spatter climbs and undercut follows. Too short and you get overlap, poor fusion and a stuck rod. Textbook chapters on SMAW operations describe the same rule in more detail.

Angle: Travel Angle and Work Angle

Angle covers two separate things. Travel angle is how far the electrode leans from vertical, or perpendicular, in the direction of travel. Trailing, also called dragging, is the most common SMAW angle because the electrode pushes slag behind the puddle where you can see and chip it. Leading, or pushing, risks trapping slag ahead of the pool, which is where inclusions come from. Keep the electrode between 15 and 30 degrees from perpendicular.

Work angle is the tilt of the joint surface relative to your travel direction. It matters most on fillets and multi-pass groove welds, where each pass sits at a different angle than the last.

Manipulation: Weave Sparingly

Manipulation is anything you do to deviate from a straight line: weaving, stepping, raising the arc. Weaving widens a bead, but it also dumps extra heat into the joint, widens the heat-affected zone and adds distortion. That is why code-governed structural work favors straight stringer beads for most fillets and groove welds. Weave when you need to fill a wide gap, and treat it as a tool, not a default habit.

Speed: The Primary Control of Weld Size

Travel speed controls bead size more than anything else. Slower travel produces a bigger bead, faster travel a smaller one. A good target is a weld pool about twice the electrode diameter wide. That single number is a fast sanity check: if the puddle is barely wider than the rod, speed up; if it is sprawling across the joint, slow down.

Reading the Weld Pool

The pool is the real diagnostic tool, and its shape tells you what to change.

Pool appearance	What it means	Correction
Oval or egg-shaped, quiet edges	Settings are right	Keep welding
Elongated or turbulent, rippling	Too hot	Lower amps or speed up
Narrow and stiff	Too cold	Raise amps or slow down
Overly wide, sloppy, running ahead	Too slow	Speed up travel
Pool pushed to one side	Bad work angle or arc blow	Correct angle, check clamp

Vertical-up and overhead travel demand the same five controls with more discipline, and electrode choice changes the picture. Our all-position welding rod guide covers how picking the right rod makes those positions easier.

Managing Arc Blow

Arc blow is the magnetic field pinching the arc sideways toward the work, common with DC, heavier currents and thicker sections. The mitigation list is short:

• Relocate the work clamp to the other side of the joint
• Use multiple clamps to average out the magnetic field
• Switch to AC
• Weld at the lowest practical amperage
• Keep a tight arc
• Increase arc force on machines that offer it

SMAW vs MIG, TIG and FCAW: When Stick Welding Is the Right Call

No process is “best.” Stick wins specific jobs decisively, and every other process wins jobs where stick is a liability.

Factor	SMAW (Stick)	GMAW (MIG)	FCAW (Flux Core)	GTAW (TIG)
Equipment cost and complexity	Lowest. Machine, electrode holder, clamp. No gas cylinder.	Moderate. Adds wire feeder, gun, gas cylinder and regulator.	Moderate to high. Feeder and gun; self-shielded wire needs no gas.	Highest. Machine, torch, gas, foot control, tungsten, hoists.
Setup speed	Fastest. Plug in, clamp, strike.	Slow. Wire, gas flow, polarity, purge on stainless or aluminium.	Moderate. Wire loading plus flow settings on gas-shielded FCAW.	Slowest. Purge, grind tungsten, set the machine.
Deposition rate and thickness	Low to moderate. Thin sheet to several inches thick, heavy electrodes, multipass work.	High. Wire feed moves far more metal per hour.	Highest of the arc processes. Fastest way to fill a heavy groove.	Low. Thin to medium material, slowest filler delivery.
All-position and overhead	Excellent. Every position, including overhead.	Good but awkward overhead; shielding gas struggles there.	Good. Common for structural and out-of-position work.	Excellent control, but overhead TIG is demanding and slow.
Position control	Least controllable. The pool and rod drive the bead.	Good, especially with a gun and proper travel angle.	Good and very repeatable at high deposition.	Best control of the pool of any arc process.
Fume and slag	Slag chipped between passes, plus spatter debris.	Little slag, but fume extraction is still mandatory in many shops.	Some slag, heavier fume than SMAW.	Cleanest weld, least debris, but fume still must be extracted.
Typical metals	Carbon and low-alloy steel, some stainless, cast iron, nickel alloys on DCEN.	Most steels, stainless, aluminium, magnesium.	Steels, stainless, hardfacing, aluminium with self-shielded wire.	Stainless, aluminium, copper, titanium, magnesium, exotic alloys.
Clean or cosmetic requirement	Poor. Slag and spatter have to come off.	Good, with spatter control.	Moderate.	Best. Aerospace and food-grade work lean on TIG.
Where it still wins	Field repair, structural fillets, pipe, thick plate, all-position work, low-volume jobs, underwater wet welding.	High production, thin to medium material, low spatter, thin-gauge fabrication.	High production in heavy steel, shipbuilding, hardfacing, outdoor work.	Thin, clean, cosmetic and non-ferrous work, precise root passes.

Why SMAW Survives

Stick is not a legacy process clinging to relevance. It wins specific jobs so decisively the alternatives lose.

It is the cheapest way into arc welding, with no gas cylinder to rent, transport or run out of. On a remote jobsite, a farm or a pipeline right-of-way, that fact decides the job.

It also shrugs off rust, mill scale and dirty steel that would cause porosity in a gas-shielded process. And it works where nothing else does: wet underwater welding, because the electrode carries its own shielding and a diver repairs below the surface with no gas bottle.

Where SMAW Loses

Be blunt: in high production, SMAW has been replaced by faster flux-cored arc welding. One FCAW pass lays down several times the metal of a SMAW bead, and arc-on time dwarfs electrode changes. Welding brackets all day, stick is slow, and slow costs money.

SMAW also demands more operator skill for repeatable results. Bead width, penetration and profile depend on how the welder manages arc length and travel angle, so two welders on one joint can produce different weld metal. Wire feed and TIG are more forgiving.

Then there is the debris: slag chipped and ground away, spatter cleaned off. That grit keeps SMAW out of work demanding precision and cleanliness, such as aerospace welding, where the standard is TIG with meticulously prepared gas. Aerospace welding processes, standards and careers shows the contrast.

The Decision Checklist

• Choose SMAW for field repair, structural fillets, pipe and hard-to-reach work, thick plate, all-position and overhead work, low-volume jobs, and anything with no gas supply.
• Choose wire feed (MIG or FCAW) when high production matters, heavy grooves need filling fast, or arc-on time decides the job.
• Choose TIG for thin material, clean cosmetic finishes, non-ferrous metals, and root passes needing precise control. The aluminum MIG welding guide shows where a different process earns its keep.

For the case for stick in one place, advantages of stick welding lays out the economics. The open textbook chapter on arc welding processes covers the fundamentals, and the AWS walkthrough of how to make a quality shielded metal arc weld is the technique reference. On fume: ventilation is a requirement, not an optional extra. OSHA 1910.252 sets the ventilation and PPE rules for arc welding, and they apply the same to stick, MIG, FCAW and TIG.

Welding Safety and Health: The Real Risks of Stick Welding

Stick welding puts more of the welder’s body into the process than most people expect. There is no gas cylinder, no torch hose, no robot arm. There is a hot rod, a live electrode holder, a bright arc, and a cloud of metal vapour you cannot see but will breathe. Most hobbyists and new hires get a brief verbal safety talk and a pair of goggles. That is not enough. Here is what the actual hazards are, what the regulators require, and what protects you.

The Fume You Cannot See

Welding fume is a complex mixture of metal oxides generated when the base metal, the filler metal and the electrode coating vaporize in the arc. The NIOSH Pocket Guide entry for welding fumes lists the health effects plainly: metal fume fever with flu-like symptoms, breathing difficulty, cough, muscle pain, fever and chills; interstitial pneumonitis; classification as a potential occupational carcinogen; lung cancer as the cancer site; and target organs including the eyes, skin, respiratory system and central nervous system. OSHA sets no PEL for total welding fume, so NIOSH directs employers to its own recommended exposure limits and Appendix A instead.

Stick welding generates fume from two sources at once, the base metal and the flux coating, which is why it is a serious ventilation problem even on thin sheet. Welding galvanised steel adds zinc oxide fume, a classic cause of metal fume fever. Stainless and alloy work adds a different problem entirely, and if you are working those materials, our guide to alloy steel welding electrodes, selection, use and safety covers the filler side of it.

Hexavalent Chromium: The Rule That Changes Your Setup

Stainless steel welding fume can contain hexavalent chromium, a confirmed carcinogen with its own OSHA standard. 29 CFR 1910.1026 sets a permissible exposure limit of 5 micrograms per cubic meter as an 8-hour time-weighted average, with an action level of 2.5 micrograms per cubic meter.

The standard requires more than a respirator. It requires regulated areas with demarcation and limited access, engineering controls and work practice controls first, with respirators under 1910.134 used only as a supplement, HEPA-filtered vacuuming rather than dry sweeping or compressed air on contaminated surfaces, hygiene facilities with no eating or drinking in regulated areas, and medical surveillance for exposed workers. If your job touches stainless or hardfacing, that is a written program, not a suggestion.

Manganese and the Welder’s Brain

Manganese comes off ordinary steel and is the fume most associated with stick welding in the shop. The limits are worth knowing cold:

• NIOSH REL: 1 mg/m³ TWA and 3 mg/m³ STEL
• OSHA PEL: 5 mg/m³ ceiling
• ACGIH TLVs: 0.02 mg/m³ respirable and 0.1 mg/m³ inhalable

Long-term overexposure causes manganism, a Parkinsonian syndrome linked to exposures above 1 mg/m³. Poorer performance on brain-function and motor-skill tests has been documented at exposures below 0.2 mg/m³. NIOSH notes that confined-space welding significantly increases exposure, which is why ventilation and monitoring matter more indoors than out.

Protecting Your Eyes and Skin

Under OSHA 1910.252, arc welding requires a helmet or hand shield. The shade number must match the electrode size, and the rule of thumb is simple: bigger rod, darker shade.

Electrode diameter	Recommended shade
1/16, 3/32, 1/8, 5/32 in	Shade 10
3/16, 7/32, 1/4 in	Shade 12
5/16, 3/8 in	Shade 14

Add leather gloves, flame-resistant clothing, safety glasses under the helmet and hearing protection. A burn-through shirt protects you from slag and spatter, which is a regular occurrence on stick welds.

Fire Prevention and the 35-Foot Rule

A fire watch is required whenever appreciable combustible material sits within 35 feet (10.7 m) of the work. The floor must be swept clean for a 35-foot radius, hot work permits apply, and a fire watch must be maintained for at least a half hour after welding or cutting stops. Sparks and slag land further than people expect, so think about the deck below as well as the bay around you.

The Electrical Side of Stick Welding

Unlike MIG or TIG, the electrode holder is always live. Never set a loaded holder down, on a bench, a scaffold plank or a bucket, because it can arc to any grounded object. A broken or flaking flux coating exposes bare rod and creates an accidental arc-strike path. And a stuck electrode can exceed 1,500 degrees Fahrenheit, so treat any rod that will not release as hot, let it cool, and snap it off. Lead handling guidance also warns that bundling and coiling leads concentrates the electromagnetic field the current creates, so keep the electrode lead and work lead twisted together and keep the work lead wrapped on the workpiece rather than trailing across the floor.

Other essentials: remove the electrode from the holder whenever work is suspended, mark hot metal so nobody touches it, and never work alone in a permit-required confined space. Atmospheric testing, an attendant and forced ventilation are non-negotiable in tanks, vessels and ship holds.

The Most Common SMAW Mistakes and How to Fix Them

Almost every ugly SMAW bead comes down to three or four root causes. Name the cause and you can fix the bead. The classic surface defects are undercut, overlap (cold roll), lack of fusion, slag inclusions and spatter, and the failure that stops work dead is a stuck electrode. The Open Oregon welding training materials cover the theory well. Here is the bench version.

Symptom	Likely cause	First move
Electrode sticks to the work	Low amps, small gap, damp or dirty rod, wrong polarity	Raise amps slightly, hold the rod closer
Groove cut into the bead toe	Arc too long, amps too high, travel too fast, wrong work angle	Shorten the arc, trim amperage
Bead rolls over the edge	Short arc, slow travel, not enough heat	Lengthen the arc, add amps
Visible unfused edges	Cold lap, dirty or oxidized metal, fast travel	Grind to bright metal, slow down
Slag trapped in the bead	Pushing travel angle, poor interpass cleaning	Trailing angle, chip slag
Spatter spitting off the pool	Excess amps, long arc, arc blow	Trim amps, shorten the arc
Holes and gas pockets	Moisture, dirty metal, wet electrodes, hydrogen	Dry electrodes, clean the joint

Electrode sticking: the most common interruption

A stick happens when molten metal bridges the gap between the puddle and the electrode tip and freezes the rod in place. The usual causes are low amperage, a starting gap that is too wide, a dirty or damp rod, or reversed polarity on a DCEP electrode such as an E6010. The fixes follow in the same order: raise the amps a notch, hold the rod closer to the work, clean the rod end and confirm polarity against the classification.

If you cannot break the rod free, do not twist or pull it. A stuck electrode can heat past 1,500 degrees Fahrenheit. Release the holder, wait about 10 seconds for the tip to cool, then snap the rod off. Holding on just burns your gloves. For rod handling and position-specific tips, see the all position welding rod guide.

Undercut: a groove along the bead toe

Undercut is the arc eating into the base metal beside the bead. It comes from an arc that is too long, amperage that is too high, travel that is too fast, or a work angle that points the arc away from the joint. Shorten the arc, trim the amps, slow your travel and reposition so the arc force pushes the puddle into the toe of the joint instead of blowing past it.

Overlap and lack of fusion

Overlap, sometimes called cold roll, is when the bead rolls over the edge of the base metal instead of melting into it. The arc was too short, the travel too slow and the heat input too low. Lengthen the arc, pick up a little speed and add heat.

Lack of fusion is the more serious cousin. One edge of the joint melts and the other does not, so you get a cold lap. Dirty or oxidized base metal, travel speed that outruns the puddle and insufficient heat all cause it. Grind the joint back to bright metal, preheat thick or heavily oxidized sections, and slow down until the pool wets the joint edges before you move.

Slag inclusions, spatter and porosity

Slag trapped in the bead almost always traces back to the travel angle. A leading (pushing) angle deposits slag ahead of the pool where it can roll into the weld, so switch to a trailing angle and chip slag between passes every time. Poor interpass cleaning and a wandering arc make it worse.

Spatter is excess amps, a long arc or arc blow. Trim the amperage and shorten the arc before changing anything else.

Porosity is a moisture problem. Damp electrodes, wet or dirty base metal and hydrogen are the usual suspects. Keep your E7018 in a rod oven, clean the joint and keep filler metal dry.

Arc blow and stray strikes

Arc blow happens when the magnetic field around the arc deflects it sideways, producing erratic bead shape and spatter. Work near the workpiece ground clamp, keep the work lead clamped to the part, tighten loose connections, use a slightly trailing angle, and remember DCEN polarity resists the effect better than DCEP. Mitigate it where you can, but it is physics, not a skill failure.

Finally, treat stray arc strikes as defects. An arc struck outside the weld zone burns the coating off the parent metal, leaves a hard spot and can cause a part to be scrapped. Better practice is to cut the electrode back 1/8 to 1/4 inch and start a fresh pass rather than welding over the strike. The AWS Welding Digest guide to a quality shielded metal arc weld covers this and the surfacing rules inspectors apply.

Starting Your Stick Welding Practice and Where to Take It Next

SMAW is the first process most welders learn, and for good reason. A machine, an electrode holder, a work clamp and a stick of coated rod is nearly all you need to lay a bead that holds. The equipment is simple, the feedback immediate, and the skills you build reading the pool transfer to every other arc process.

A practice ladder that works:

1. Flat stringers on 1/4 inch plate with E6013. You can watch the pool here without fighting gravity, and E6013 gives a forgiving arc and a wide, visible bead. Cut them apart and study reinforcement, toe and penetration. Learn what 70 amps looks like versus 90 amps on the same plate.
2. 3/32 inch E7018 in flat and horizontal fillet. A tighter, more controlled arc and the bead shape structural work expects. Move up once you can read a pool.
3. Vertical up, then overhead. Both punish every habit you built flat. Keep the same plate and pool size; only the position changes.
4. Multi-pass groove welds. Root, fill and cap passes on a prepared joint, with interpass cleaning, since slag left behind becomes an inclusion. Then qualify to a written procedure.

Certification and the Standards That Govern the Work

Three documents matter more than almost anything else you will learn. AWS Welding Fundamentals is the self-paced online curriculum to start with: Module 9 covers SMAW process characteristics and electrodes, Module 10 covers SMAW operations, equipment and process. AWS A5.1 is the specification for carbon steel electrodes and filler metal for SMAW, where the classification numbers, tensile strength requirements and testing methods come from. AWS D1.1 governs structural steel welding, its joints, welds and inspection rules. ASME BPVC Section IX, covered in the qualification chapters, covers welder and procedure qualification.

That leads to the pair everyone asks about. A WPS, or Welding Procedure Specification, is the written recipe: base metal, filler, amperage range, travel speed, preheat, sequence, acceptance criteria. A WPQ, or Welder Performance Qualification, is your tested proof that you can make that weld within those limits. The WPS says what to do; the WPQ proves you can do it.

What a Beginner Actually Needs

Your shopping list is short, which is the whole point:

• A machine with a stick setting
• An electrode holder and a work clamp
• A welding helmet with the right shade for your rod
• Leather gloves and a jacket
• A chipping hammer and wire brush
• A 10 lb box each of E6013 and E7018

One caveat: that list is for practice, not a production specification. Electrode selection should follow base metal, thickness, position, service conditions and code requirements. Welding stainless, pressure work or D1.1 structural steel means the rod comes off the procedure, not off a blog list. Our all position welding rod guide covers the classification logic.

Before you strike an arc, read the safety basics, particularly fume and hexavalent chromium, so ventilation and a respirator plan are in place from the first bead. The airgas welding equipment guide covers the shielding gas side of the trade SMAW deliberately does not need.

Conclusion

So, what does SMAW welding meaning come down to? Shielded metal arc welding is a manual, self-shielded, flux-coated-electrode process that has survived more than a century because it is cheap, portable and versatile. A generator in a field, a machine in a shop, a hot rod holder in one hand, a bead that holds. But the process is not the hard part. Reading the weld pool is the skill that separates a welder from someone who moves a rod around, and amperage, angle, travel speed and the codes all follow from that habit.

Frequently Asked Questions

What does SMAW welding mean?

SMAW stands for Shielded Metal Arc Welding. It is a manual arc welding process in which a constant-current arc is struck between a flux-coated consumable electrode and the base metal, and the coating decomposes into a shielding gas and slag that protect the molten weld pool. It is the same process most people call stick welding, manual metal arc welding (MMA), or simply arc welding.

Is SMAW the same as stick welding?

Yes. ‘Stick welding’ is the trade nickname for SMAW, and the coated rod looks like a glue stick, hence the name. MMA is the equivalent term used in British and ISO-style standards. Note that self-shielded flux-cored wire looks similar but is classified as a separate AWS process, FCAW-S, and is not a form of SMAW.

What polarity should I use for SMAW?

It depends on the electrode, and the answer is in the classification number. Most electrodes, including E6010, E7018 and E7014, are DCEP — electrode holder to the positive terminal, work clamp to negative. E6013 runs on AC, DCEP or DCEN, and E6012 is AC or DCEN. Running an electrode on the wrong polarity gives a poor arc, a weak bead and a lot of spatter.

What amperage do I use for a 1/8 inch E7018 electrode?

The manufacturer-recommended range is 90 to 160 amps, but that is only a starting point. Base metal thickness matters more than the chart: 1/4 inch steel typically lands around 110 to 125 amps, thicker plate takes more and thinner plate less. A narrow, high-crowned bead means turn up; a wide flat bead with spatter and undercut means turn down.

Why does my electrode keep sticking to the steel?

Sticking usually means low amps, too large a gap when you start the arc, a dirty or damp electrode, or wrong polarity. Try a scratch start or a firm tap start, clean the rod end, check your polarity against the classification, and raise the amps a little. If the rod welds itself on and will not release, let go of the holder, wait about 10 seconds for it to cool, then snap it off.

Do I need a rod oven for E7018 electrodes?

For critical, code-governed or high-strength work, yes. E7018 is a low-hydrogen electrode, and its potassium and iron powder flux absorbs moisture from the air, which reintroduces hydrogen and drives porosity and cracking. A rod oven holds the electrodes dry between uses. For occasional hobby work, a sealed container with desiccant and a warm, dry storage spot gets you most of the way there.

Can you weld stainless steel and aluminum with SMAW?

Stainless steel, yes — use a stainless electrode such as E308L, and expect the fume to contain hexavalent chromium, which is why OSHA 1910.1026 sets a 5 microgram per cubic meter PEL and requires engineering controls, hygiene facilities and often medical surveillance. Aluminum is possible with specialist electrodes but is uncommon and not the process of choice; GTAW or GMAW are much better suited.

What shade welding helmet lens do I need for stick welding?

OSHA’s guide in 1910.252 lists shade 10 for SMAW with 1/16, 3/32, 1/8 and 5/32 inch electrodes, shade 12 for 3/16, 7/32 and 1/4 inch electrodes, and shade 14 for 5/16 and 3/8 inch. Auto-darkening helmets let you start light and darken for the strike, which is a big comfort win for beginners learning to start an arc.

Is stick welding safe for a beginner to learn at home?

It is one of the more approachable processes to learn, but it carries real hazards: fumes, radiant arc light, fire, electricity and hot metal. Work in a well-ventilated space or use fume extraction, wear a proper shade helmet, gloves and flame-resistant clothing, keep combustibles at least 35 feet away or shield them, and never weld on a container that has held flammables without cleaning and purging it first.

How hot is a stick welding arc?

Roughly 6,000 to 11,000 degrees Fahrenheit (about 3,316 to 6,093 degrees Celsius). That is hot enough to ignite combustibles, to make the electrode itself glow, and to cause a stuck electrode to exceed 1,500 degrees Fahrenheit in just a few seconds, which is why a hot electrode should never be touched with a gloved hand.