MMAW Welding Process: The Complete Stick Welding Guide

It is 11 p.m., the gate hinge on a livestock trailer has torn away, and the only machine within thirty miles is a battered engine-driven welder with a stinger, a ground clamp, and a tin of electrodes that has been in the toolbox since spring. Nobody is reaching for a TIG torch. That moment explains why the MMAW welding process — manual metal arc welding, or stick welding — has survived every wave of welding automation and remains the default repair process on farms, pipelines, and structural steel sites worldwide.

Why the MMAW Welding Process Still Rules the Job Site

It is 11 p.m. and a livestock trailer gate hinge has torn clean off its post. The only machine for thirty miles is an engine-driven welder in the back of a pickup, a stinger, a ground clamp, and a tin of electrodes that has been riding around since spring. Nobody is reaching for a TIG torch. That scene is the whole argument for the MMAW welding process in miniature: when the job is dirty, windy, remote, and urgent, stick welding shows up and gets it done.

Manual metal arc welding (MMAW) is an arc welding process in which a flux-coated consumable electrode carries the current, strikes an arc against the workpiece, and melts into the joint as filler metal. The arc does two jobs at once. It melts the base metal and the electrode tip, and it burns the coating, which releases shielding gas around the molten pool and leaves a slag blanket over the cooling weld. The welder feeds the rod by hand as it shortens, maintaining the arc gap. That manual feed is the “manual” in manual metal arc, and it is also why the process takes practice.

The equipment list is almost embarrassingly short: a constant-current power source, two cables, a stinger, a ground clamp, and electrodes. There is no gas cylinder to refill, no wire feeder to thread, and no regulator to knock over in the mud. That simplicity is the reason stick welding remains the default choice for field repair, pipeline root passes, structural steel erection, and maintenance work worldwide.

The Electrode Does Three Jobs at Once

What separates MMAW from every other common arc process is the electrode itself. It is not just filler wire fed from a spool. The rod is the filler metal, one side of the electrical circuit, and the shielding delivery system, all in a single consumable that shrinks as you weld. The coating is not a thin cosmetic layer either. It makes up a significant fraction of the rod’s mass, which explains why stick welding deposition efficiency typically lands in the 60 to 70 percent range rather than near 100 percent. A good share of what you paid for goes up as gas and comes off as slag.

That trade-off buys real advantages. The flux coating stabilizes the arc, generates the shielding atmosphere, protects the weld from the air, and can add alloying elements to the deposit. Because the shielding comes from the rod rather than a gas cloud, a breeze that would blow MIG shielding away barely bothers a stick welder. The process also tolerates mill scale, rust, and less-than-perfect cleaning better than most alternatives. For a fuller breakdown of those strengths, see advantages of stick welding.

The process is not new. Coated-electrode designs were patented in the early 20th century, and stick welding became the backbone of shipbuilding and construction as those industries scaled up. The principles have barely changed since. The machines have. Inverter technology has made power sources lighter and more efficient, but the arc, the flux, and the hand-fed rod remain the same.

Who This Guide Is For and What It Covers

This guide is written for four overlapping groups: hobbyists who want to repair equipment without buying three machines, maintenance technicians who weld occasionally and need reliable results, apprentices learning the process properly, and engineers who specify welding work and need to understand what they are asking for. No prior knowledge is assumed, but nothing is dumbed down either.

Expect a full tour. We will decode electrode classifications so E6010, E6013, and E7018 stop looking like part numbers. We will cover polarity, amperage, arc length, and travel angle with settings you can actually use. Then come the defects, the safety requirements, the honest comparisons with MIG, TIG, and flux-cored, and a practice plan for getting genuinely good. Arc welding sits inside a dense web of regulation covering shock, fumes, and fire, which is why OSHA maintains welding, cutting, and brazing standards that apply to every stick job, including the one on that trailer at 11 p.m.

Stick welding has survived every wave of automation for a simple reason: it works where other processes cannot follow. Understanding why starts with the arc itself.

What Is the MMAW Welding Process? Arc, Flux, Slag and Shielding Explained

Strip away the stinger, the cables and the chipped paint on the machine and the MMAW welding process is really four things happening at once: an electrical circuit, a chemical reaction, a shielding system, and a slag factory. Understanding how those four interact is the difference between a welder who copies settings off a chart and one who can diagnose a bad bead on the spot.

The Power Source: Why Stick Machines “Droop”

Stick welding runs on a constant-current, or drooping-characteristic, power supply. That single design choice explains most of the process’s forgiving nature. On a constant-voltage machine like a MIG set, the current swings wildly as the arc length changes. On a constant-current machine, the opposite is true: as the welder’s hand drifts and the arc gets longer, voltage rises but current barely moves, so the arc stays lit without blowing the rod apart or stubbing out. The welder’s hand becomes the wire-feed mechanism and the arc-length control simultaneously.

Typical open-circuit voltage on a stick power source sits in the 50–90 volt range — enough to strike and maintain an arc, but not enough to be casual about. Once the arc is established, welding voltage commonly settles around 20–30 volts. Current, meanwhile, is where the real work happens, usually between 70 and 200 amps depending on electrode diameter. Workplace electrical rules set limits on open-circuit voltage for these machines, which is why you’ll see OSHA 1910.254 cited in shop safety documentation.

Inside the Arc Zone: Droplets, Gas and Slag

Steel melts at roughly 2,500–2,800 °F (about 1,370–1,540 °C). The arc itself is far hotter, hot enough to melt the electrode tip, the base metal and the coating all at once. Metal crosses the gap in a stream of fine droplets, while the coating burns back slightly ahead of the core to form a cone-shaped shield around the transfer.

That coating is doing chemistry, not decoration. It decomposes in the heat to release shielding gas that pushes atmospheric nitrogen and oxygen away from the molten pool. It contributes deoxidizers that mop up what oxygen slips through. And it forms slag — a glassy or crusty layer that floats on the bead and keeps protecting the cooling metal until you chip it off. Slag isn’t a byproduct to be tolerated; it’s the second half of the shielding system.

Process Stage	What You See, Hear and Smell
Striking the arc	Sharp crackle, bright flash, a burst of spatter as the coating ignites
Steady cellulosic arc (E6010)	Loud, forceful hiss-roar, deep penetrating pool, thin friable slag, faint burnt-paper smell
Steady rutile arc (E6013)	Soft bacon-frying hum, finer spatter, smooth bead, thicker glassy slag
Iron-powder arc (E7024)	Heavy, quiet, fast-filling pool with a dense slag blanket that sometimes self-lifts
Cooling and chipping	Ticking and pinging as slag contracts, then grey-brown crust flaking off the bead

The Four Jobs of the Flux Coating

1. Shielding — generates gas that displaces air around the arc and pool.
2. Arc stabilization — easily ionized compounds, including potassium and sodium silicates, keep the arc rooted and steady, especially on AC.
3. Slag protection — the solidified slag blanket slows cooling and blocks oxygen and nitrogen from the freezing metal.
4. Alloying and refining — metallic powders and deoxidizers add alloy and clean the weld metal.

Polarity: DCEP, DCEN and AC

Polarity is not a free choice — the coating chemistry decides for you. Direct current electrode positive (DCEP) puts roughly two-thirds of the heat into the workpiece, giving deeper penetration; it’s the standard for cellulosic and most low-hydrogen electrodes. DCEN reverses that balance, shallower penetration and faster melt-off, used with a handful of specialty and hardfacing rods. AC alternates, which helps break up arc blow on long joints and suits electrodes designed for it. Running a rod on the wrong polarity changes the arc character, the bead profile and, with some coatings, the mechanical properties.

Heat Input, Penetration and How the Pool Behaves

Heat input is a function of amps, volts and travel speed, and it shows up directly in the penetration profile and the heat-affected zone. Turn the amps up and the pool gets fluid and digging; slow down and heat soaks into the plate.

Coating type changes the pool’s personality. A fast-freeze cellulosic electrode like E6010 produces a small, quick-setting pool that holds its shape in vertical and overhead work — the trade-off is a forceful, spattery arc and hydrogen in the deposit. A fast-fill rutile or iron-powder electrode like E6013 or E7024 lays down metal quickly with a smooth arc and easy slag removal, but the pool stays wet and sluggish, which is why those rods are happiest flat. These differences in deposition behaviour are a big part of why stick welding still wins on remote and outdoor jobs.

Reading a Stick Electrode: E6010, E6011, E6013, E7018 and What the Numbers Mean

Hand a beginner a tin of mixed electrodes and you can predict the next hour: three

Reading a Stick Electrode: E6010, E6011, E6013, E7018 and What the Numbers Mean

Hand a beginner a tin of mixed electrodes and you can predict the next hour: three rods tried at random, one weld ruined by the wrong polarity, plenty of guessing. That printed code on the coating is a datasheet compressed into six or seven characters, and decoding it takes about ten minutes. Once you can read it, you stop buying whatever is on the shelf and start matching the rod to the steel, the position, and the machine you actually own.

The Four Parts of an AWS Classification

Electrodes in the US follow the AWS A5.x classification system. The series matters too: A5.1 covers covered electrodes for carbon steel, A5.5 for low-alloy steel, and A5.4 for stainless. Inside a classification, the string breaks down like this:

• E — electrode: the rod carries the current and becomes the filler metal.
• Two or three digits — minimum tensile strength in ksi, thousands of psi.
• Next digit — position. 1 is all-position, 2 is flat and horizontal fillets, 3 is flat only.
• Final digits — coating chemistry and the current or polarity it is built for.

So in E7018: E is electrode, 70 means 70,000 psi minimum tensile strength, 1 means all-position, and 8 denotes a low-hydrogen iron-powder coating.

Worked Examples You Will Actually Meet

E6010 is a cellulosic rod with a thin coating that burns off as a stiff gas jet, giving deep, aggressive penetration and a fast-freezing pool. It runs on direct current electrode positive (DCEP) only, which is why it became the classic pipeline root-pass electrode: that forceful arc punches through mill scale and drives a clean root.

E6011 is the potassium-bearing cellulosic variant. Same digging character, but it also runs on alternating current, making it the go-to rod on AC-only machines and for farm and general repair work. If you are choosing between the two, our all-position welding rod guide walks through how position capability changes the decision.

E6013 is rutile, with a soft arc, easy restriking, and shallow penetration. Friendly on thin sheet and clean steel, forgiving for beginners, but it will not dig through rust and it struggles on thick, restrained joints.

E7014 adds iron powder to a rutile coating, so it deposits faster than E6013 while staying smooth and easy to run on AC or DC. Good for general fabrication and light structural work.

E7018 is the structural workhorse: 70 ksi, all-position, low-hydrogen iron powder. It runs on DCEP or AC, lays a smoother bead than cellulosic rods, and resists hydrogen-assisted cracking, provided the coating is dry and you use a proper hot start and tie-in. For low-alloy variants on higher-strength steels, see alloy steel welding electrodes.

E7024 is heavily iron-powdered and deposits metal fast with a soft arc, but it is limited to flat and horizontal fillet positions. It belongs on a bench or a positioner, not on a vertical column.

E308L-16 is stainless, classified under A5.4: a low-carbon 308 composition with a rutile coating that runs on AC or DC. The standard choice for joining 304-type stainless in food, dairy, and chemical work.

Electrode	Coating	Current	Positions	Typical use
E6010	Cellulosic	DCEP only	All	Pipeline roots, dirty steel
E6011	Cellulosic, potassium	AC or DCEP	All	Repair, AC machines, roots
E6013	Rutile	AC or DC	All	Sheet metal, light fabrication
E7014	Rutile + iron powder	AC or DC	All	General fab, higher deposit
E7018	Low-hydrogen iron powder	AC or DCEP	All	Structural steel, restrained joints
E7024	Iron powder	AC or DC	Flat, horiz. fillet	High-deposition bench work
E308L-16	Rutile (stainless)	AC or DC	All	304 stainless fabrication

Low-Hydrogen Storage: The E7018 Rulebook

E7018 earns its reputation only if the coating stays dry. Hydrogen from moisture drives cold cracking in restrained, thick, or high-strength joints, and a low-hydrogen rod left open in a humid shop is no longer low-hydrogen. Keep sealed containers sealed until use, then hold opened electrodes in a holding oven at roughly 250–300 °F. Manufacturers typically cap ambient exposure at a few hours, commonly around four, so check the datasheet rather than trusting habit. Electrodes past that limit can often be reconditioned in a baking oven, usually around 500–600 °F for about an hour per inch of diameter, but follow the maker’s instructions and do not recondition the same batch indefinitely.

Diameter, Length and Amperage

Stick electrodes run from about 1/16 inch up to 1/4 inch, with standard lengths of 9, 12, 14, and 18 inches. The 3/32 and 1/8 inch sizes are the workhorses: thin enough for vertical-up and root work, thick enough to carry real current. Diameter drives amperage directly, and a useful starting rule is roughly 1 ampere per thousandth of an inch, so 1/8 inch (0.125) lands near 125 A. Fine-tune from there by sound and bead profile. Too little current gives a gummy, cold bead that piles up; too much overheats the rod, widens the pool, and invites undercut.

Moisture, Rust and Damaged Coatings

A damp electrode ruins a weld several ways at once: the arc sputters and wanders, spatter jumps, porosity appears, and hydrogen enters the metal where you cannot see it. Rust on exposed core wire beyond the coating causes similar instability, while chipped coating strips away shielding gas and slag formers exactly where the arc needs them. The fix is unglamorous — buy from a real distributor, store rods in a dry cabinet, keep 7018 hot, and scrap anything swollen, cracked, or fuzzy.

Setting Up and Running a Bead: Polarity, Amperage, Arc Length and Travel Angle

Everything so far has been theory. This is where the machine hums, the rod smokes, and you learn whether your settings were right. Stick rewards a repeatable sequence, so work through these steps in order every time. Once the routine is habit, your attention belongs on the puddle.

Step 1: Choose the Machine and Inspect the Cables

Three machine types dominate. Transformer welders are heavy, cheap, and nearly indestructible. Inverters are light enough to carry up a ladder and usually hold a steadier arc. Engine-driven units go where there is no power at all, and they are often rated at a 60 percent duty cycle at maximum output: six minutes of actual welding in any ten-minute window. Running 1/8 inch rod at 120 amps on a small portable box? Check that rating first, because thermal shutdown mid-pass is its own lesson in frustration.

Then walk the leads: cracked insulation, a loose stinger jaw, corroded ground-clamp faces. A weak connection anywhere in that chain shows up as a stuttering arc you will wrongly blame on your technique. OSHA’s welding circuit requirements exist for good reason, and a damaged cable is a shock hazard before it is ever an inconvenience.

Step 2: Clean the Metal and Place the Ground

Grind or wire-brush the joint down to bare, shiny metal, an inch or so past each side of the weld. Stick is more forgiving of mill scale than TIG, but forgiving is not immune. Clamp the ground close to the joint, on clean metal, on the same piece you are welding. Long return paths through a steel table or building frame invite arc blow and erratic behavior.

Step 3: Set Polarity, Then Amperage

Polarity is set by the electrode classification, not by preference. Electrode positive, or reverse polarity, puts more heat into the workpiece and is standard for E7018 and most low-hydrogen rods. Electrode negative, or straight polarity, puts more heat into the electrode and suits cellulosic E6010 on root passes and many hardfacing products. When in doubt, read the rod’s data sheet.

For amperage, start with the common rule of roughly 30 amps per 1/32 inch of electrode diameter, then adjust for joint thickness and position. Thicker sections tolerate more current; overhead and vertical work want less. The table below shows practical starting ranges.

Electrode Diameter	Typical Range	Notes
1/16 in (1.6 mm)	20–40 A	Thin sheet, tacking
3/32 in (2.4 mm)	40–85 A	E6010 low end, E7018 high end
1/8 in (3.2 mm)	70–130 A	The all-round workhorse
5/32 in (4.0 mm)	110–170 A	Structural fill passes
3/16 in (4.8 mm)	140–210 A	Heavy plate, flat only

Step 4: Control Arc Length, Angle and Travel

Keep the arc short. For cellulosic electrodes, roughly one electrode diameter of gap keeps the gas column intact; low-hydrogen rods want it tighter still, almost dragging. Too long and you lose gas coverage, spatter rises, and penetration drops. Hold the electrode about 10–15 degrees off vertical, tilted in the direction of travel for a slight drag, or pushed slightly ahead where specified. Travel speed follows the puddle: fast enough to keep it a controlled oval, slow enough that the edges wet in without crowning. Keep any weave within two to three times the electrode diameter; wider weaving traps slag at the toes.

Step 5: Striking, Restarting and Finishing

Strike by scratching or tapping the rod tip on the plate ahead of the joint, then lift to arc length. If the rod sticks, snap it free by rolling your wrist rather than yanking. On restart, particularly with E7018, strike an inch ahead of the crater and back-step into it. This burns off the cold, unshielded tip and prevents porosity at the tie-in. Hold briefly at the crater before lifting out to fill it, or you leave a shrinkage crack waiting to happen. On long seams, back-step the sequence: short segments welded in reverse of the overall direction balance contraction. If your machine has hot-start, use it on low-hydrogen electrodes to reduce sticking. The same all-position fundamentals are collected in this all position welding rod guide, worth reading alongside practice sessions.

A Practice Drill That Actually Builds Skill

1. Pad of beads: On 1/4 inch scrap plate, run overlapping straight beads with 1/8 inch E6013 at about 110 amps. Aim for consistent width, even ripples, no undercut.
2. T-joints: Weld 1/4 inch fillets flat, then horizontal. Aim for equal leg lengths and slag that lifts cleanly.
3. Vertical-up: The same fillet, uphill, at reduced current. Aim for no sagging and no slag trapped between passes.
4. Restarts: Break the arc every three inches and practice tie-ins until the joint looks continuous.

Count your arc-on time honestly. Ten minutes of welding per hour is typical when learning, so duty cycle rarely bites, but heat, setup, and slag chipping eat the clock. Stick is portable, wind-proof, and famously cheap to start; our piece on the advantages of stick welding makes that case in depth. The goal now is simple: same settings, same angles, same rhythm, until the bead stops surprising you.

MMAW Troubleshooting: Common Defects, Causes and Fixes

Experienced stick welders don’t troubleshoot by guessing. They read the bead, match the signature to a mechanism, then change one variable at a time and watch what happens. Almost every defect in the MMAW welding process traces back to a short list: dirty metal, damp electrodes, wrong polarity, an arc held too long, or travel speed that outran the puddle. Once you can recognise the signature, the fix usually names itself.

Reading the Defects

• Slag inclusions. The most common stick defect by a wide margin, and it nearly always traces to incomplete chipping and brushing between passes. Slag rolls ahead of the puddle and gets walled in. You’ll see dark linear streaks or glassy pockets along the bead edge, or a ragged line on a bend test. Fix: chip, brush, and look at every pass before the next one.
• Porosity. Gas that never escaped. On a restart it is frequently a long arc strike or moisture absorbed into a low-hydrogen coating. Pinholes cluster at the restart point, which is your clue. Fix: strike slightly ahead and back into the crater, keep the arc tight, and use electrodes straight from a holding oven.
• Wormhole porosity. Elongated, tunnel-like voids, usually from damp electrodes, excessive arc length, or heavy mill scale and rust burning under the arc.
• Undercut. Typically excessive current, excessive arc length, and a travel speed that outruns the puddle — the arc gouges the parent metal at the toes and the filler never fills it back in. Turn down, tighten up, slow down.
• Lack of fusion. A cold lap: the bead sits on the plate instead of tying into it. Low current, fast travel, a dragging angle that pushes slag ahead of the metal, or an unclean surface. The bead can look fine, which is the danger.
• Incomplete penetration. Root gaps too tight, too large a rod for the root, or insufficient current. On pipe and structural work this is a rejection, not a blemish.
• Spatter. Long arc, wrong polarity, damp coating, or current on the high side. Mostly cosmetic, but heavy globs can mask a lack of fusion underneath.
• Arc blow. The arc wanders because the magnetic field around the joint is unbalanced. It shows up at the ends of long joints, at corners, and when welding near heavy steel structures — heavy spatter, a hissing unstable arc, and slag trails that point the wrong way.
• Cracking. Hydrogen-assisted cold cracking in high-strength or thick steel often appears hours after the welder has packed up, sometimes with an audible ping. Low-hydrogen electrodes, proper preheat, and controlled cooling are the standard defence. Hot cracking happens while the metal is still solidifying, usually in deep narrow beads, high-restraint joints, or steels with sulphur and phosphorus picked up from contamination.
• Ugly bead appearance. Rarely a defect in itself, but wandering ripple spacing, a changing width, and a ragged profile are early warnings of inconsistent arc length and travel speed.

Diagnostic Table

Defect	Likely cause	Fix
Slag inclusion	Slag not removed between passes	Chip and brush to bare metal each pass
Porosity at restart	Long arc strike, damp E7018	Back-step restart, oven-dry electrodes
Undercut	High current, long arc, fast travel	Reduce amps, tighten arc, slow down
Lack of fusion	Low current, wrong angle, dirty steel	Raise amps, adjust work angle, grind clean
Arc blow	Unbalanced magnetic field	Move ground, switch to AC, shorten arc
Cold cracking	Hydrogen plus restraint and fast cooling	Low-hydrogen rods, preheat, slow cooling

Pretty Is Not the Same as Sound

A uniform bead with tidy ripples proves the welder has steady hands. It does not prove the metal underneath is fused. Visual inspection catches surface defects only; subsurface defects need ultrasonic or radiographic testing, and neither is something you can eyeball. That’s also why choosing the right rod for the position matters so much — a fast-fill electrode run vertically up will look acceptable and fuse poorly. Our all position welding rod guide covers the position-by-position matchups. When in doubt about a crack, a visible lack of fusion, or undercut beyond the acceptance criteria, gouge it out and reweld. Patching over a defect buries it. Carbon arc gouging is the fast way to remove bad metal, and on code work the repair still follows the same qualified procedure. Electrode classifications themselves follow AWS standards.

Five-Point Pre-Weld Checklist

1. Electrode correct for the position, dry, and stored properly.
2. Joint ground to bare, clean metal — no rust, paint, oil, or slag.
3. Polarity and amperage matched to rod diameter and plate thickness.
4. Ground clamp close to the joint, on clean metal, cable undamaged.
5. Arc length and travel angle set in your head before you strike.

Tape that to the side of the machine. Most of the defects above disappear before the arc is even lit.

Where MMAW Wins: Real Applications from Pipeline Roots to Farm Repairs

MMAW is rarely the fastest process in the shop. There is slag to chip, deposition rates are modest, and the welder stops every few inches to change an electrode. Yet it keeps showing up where the job is remote, windy, dirty, or structurally unforgiving. That is not nostalgia or habit. It is a clean match between process strengths and site constraints. The advantages of stick welding become obvious once you stop asking which process is best and start asking what the site will actually allow.

Structural Steel and Pipeline Roots

On structural steel erection, the welder often works at height, in wind, with a stinger, a work lead, and a portable machine. There is no gas cylinder to haul up, no regulator to knock over, and no hose to drag across a beam. Stick is largely unaffected by wind because the shielding gas is generated at the arc as the flux coating burns, rather than delivered through a nozzle where a gust can strip it away.

That single characteristic explains why MMAW still holds ground on exposed field welds. A gas-shielded process on an open deck in a crosswind needs a shelter, and a shelter at elevation is a rigging problem. A stick welder just welds.

Pipeline root passes are the other classic case. Cellulosic electrodes such as E6010 freeze fast, dig deep, and burn through mill scale and surface contamination. The welder sets a root gap, works with a whip-and-pause motion to control penetration and fill the keyhole, then follows with a hot pass before the fill and cap. Fast-freeze slag means the root can be climbed in position without the puddle running out ahead of the arc.

On restrained joints and thicker sections, the electrode of choice shifts to a low-hydrogen type like E7018. Those rods must be properly stored. Moisture in the coating turns into hydrogen in the weld, and hydrogen in a restrained joint is a cracking risk. Rods come out of a sealed container into a heated quiver or portable oven, and electrodes that have been exposed to the atmosphere too long get redried per the manufacturer’s instructions before they go anywhere near a structural weld.

Field Maintenance and Farm Repairs

Walk into any farm shop, quarry, or rental yard and you will usually find a small engine-driven or inverter stick machine. It earns its place because one box of electrodes and one lead set covers an enormous range of jobs:

• A broken gate hinge, straightened and gusseted on the spot.
• Cracked trailer fenders, exhaust brackets, and mower decks.
• Reinforcing a rusted equipment frame that nobody is going to sand clean.
• Rebuilding a worn bucket edge or a loader pin boss before it completely fails.

The steel in these repairs is often rusty, painted, greasy, or of unknown alloy. Stick tolerates all three better than most processes, because the flux does part of the cleaning work and the slag blanket shields the cooling weld from the air. Outdoors, the wind that would ruin a MIG weld is a non-issue. Add a generator, an extension lead, and a ground clamp, and you have a complete repair capability that fits in the back of a pickup.

Repair Work Where Access and Surface Condition Rule

Maintenance welding is frequently a reach problem rather than a quality problem. Stick shines here for a practical reason: the electrode holder is small, the cable is flexible, and a rod can be bent to get into a corner or around an obstruction that no gun or torch will fit. Long work leads let the machine sit far from the arc, which matters on scaffolding, inside tanks, or across a yard.

Thick, unknown, contaminated sections also favour the process. Deep penetration into a heavy casting or a repaired structural member is more forgiving with a digging electrode than with a shallow-penetrating wire process, and the arc is easy to restart on a partially completed joint.

Where It Still Fits in the Shop

MMAW is not only a field process. Job shops keep a stick machine for one-offs, heavy sections, cast iron repair with nickel electrodes, and hardfacing where abrasion resistance matters more than speed. It is a poor fit for thin sheet, where the arc burns through before the welder can react, and for high-volume production where deposition rate decides the quote.

Application	Typical electrode	Why MMAW fits
Pipeline root pass	E6010 cellulosic	Fast freeze, deep penetration, burns through mill scale
Structural field welds	E7018 low hydrogen	Wind resistant arc, low hydrogen deposit
Farm and maintenance repair	E6011 or E7014	Runs on dirty steel, portable, no gas supply

The pattern is consistent. MMAW wins wherever portability, tolerance of surface condition, and resistance to wind outweigh speed. Those conditions are far more common in the real world than a clean, calm, indoor bench.

MMAW vs MIG, TIG and Flux-Cored: Honest Comparisons and Limitations

Ask five welders which process is best and you will get five confident, contradictory answers. The truth is less romantic: every arc process is a set of trade-offs, and MMAW happens to trade speed and cleanliness for toughness, portability and forgiveness. Understanding exactly what you give up when you pick up a stinger is what separates a welder who chooses a process from one who just defends a favourite.

The Short Scorecard

Process	Deposition	Learning Curve	Cost & Portability	Wind	Out of Position	Cleanup
MMAW (stick)	Low to moderate — stub loss and slag eat the clock	Moderate; one hand juggles arc length, angle and travel	Lowest; runs off any generator	Excellent	Excellent with the right electrode	Heavy chipping and brushing
GMAW (MIG)	High — no slag, no stub loss	Easiest first arc	Moderate; gas cylinder to haul	Poor outdoors	Fine on sheet, weaker overhead	Light spatter only
GTAW (TIG)	Low; slow by design	Steepest	Highest	Very poor	Excellent	None
FCAW (flux-cored)	High; continuous wire plus flux shield	Moderate	Moderate; gasless versions travel well	Good	Good	Slag, much like stick
SAW (submerged arc)	Very high	Different skill set; mechanized	High; shop-bound	Not applicable indoors	Flat only	Flux recovery needed

Why the Wire Processes Pull Ahead on Speed

Solid-wire GMAW generally achieves much higher deposition efficiency than stick welding for a simple structural reason: there is no slag to chip and no electrode stub thrown away. Every inch of wire you buy becomes weld metal, and the gun keeps feeding until you release the trigger. Stick, by contrast, stops every time you burn down to a stub, and the coating that protects the pool becomes a layer you must remove before the next pass. On a long production joint, that difference compounds into hours.

Flux-cored arc welding is often described as the middle ground, and the description holds up. You get continuous wire feed and a flux-based shield, which means higher deposition than stick plus wind tolerance that MIG’s gas cloud cannot match. Self-shielded wires are common on outdoor structural and repair work. The cost is familiar: slag on every pass, and fume that demands attention. Every one of these processes generates fume, and OSHA’s welding and cutting guidance treats ventilation as a baseline requirement rather than an optional extra.

Where TIG and SAW Sit

TIG produces the cleanest, most controllable arc of the group, which is why it dominates thin stainless, aluminium and aerospace work — see this aerospace TIG welding guide for how strict that world gets. But it is slower, needs both hands, and is far less tolerant of wind and dirty material than MMAW. Submerged arc is the opposite extreme: enormous deposition, flat position only, buried under a blanket of granular flux, and suited to shop fabrication rather than a trailer repair in a muddy yard.

Where Stick Genuinely Loses

• Deposition rate: the slowest of the common manual processes, and the gap widens on thick sections.
• Slag time: chipping, brushing and inspecting between every pass on multi-pass work.
• Electrode changes and stub loss: constant interruptions, plus the last couple of inches of every rod discarded.
• Hydrogen risk: cellulosic electrodes such as E6010 and E6011 deposit high-hydrogen weld metal, which is why low-hydrogen consumables and storage discipline matter so much on crack-sensitive steel.
• Thin sheet: stick welding struggles on very thin sheet metal, where low current and arc stability become difficult to control, making MIG or TIG the usual choice. The same logic applies to aluminium, where a MIG setup is almost always the practical answer.
• Spatter and physical
  

  Safety, Fumes and Compliance: What Every Stick Welder Must Know

  Stick welding is forgiving of dirty steel. Your eyes, lungs, and skin are not. Every arc produces intense radiation, spatter, a live electrical circuit, and metal-bearing fume. Those hazards are predictable, which means they can be engineered out of the job rather than left to luck.

  The common mistake is treating safety as a helmet and gloves. Bigger risks accumulate quietly: arc eye hours later, fume across a shift, a spark smoldering under a bench after the welder has packed up.

  The Arc Is a Radiation Source

  The arc emits ultraviolet and infrared radiation far more intensely than sunlight. UV can burn the cornea and skin, often with a delay, which is why “arc eye” may not show up until evening. The arc also reflects off concrete and stainless, so people nearby need protection too.

  Wear a proper helmet with the right filter. ANSI Z49.1, referenced in OSHA’s welding guidance, recommends roughly shade 10 for shielded metal arc welding at 60-160 amperes, with darker shades as current rises. Add safety glasses under the hood, leathers or gauntlets, and clothing that will not melt into a burn. Cover exposed skin; spatter stays hot longer than it looks.

  Electric Shock: You Are Part of the Circuit

  An idle stick welder still has open-circuit voltage at the stinger. It is lower than mains voltage, but dangerous when skin is wet, gloves are damp, or the welder stands on wet ground. Inspect leads for damaged insulation, keep the electrode holder fully insulated, and clamp the ground to clean bare metal close to the joint. Never weld in standing water or with wet gloves, and disconnect the machine before repairing a cable. The HSE welding guidance covers electrical and fume controls in practical terms.

  Fire Prevention: Permit, Perimeter, Watch

  NFPA 51B, the hot-work fire prevention standard, calls for clearing combustibles within 35 feet, controlling ignition sources, and maintaining a fire watch during and after welding. The NFPA 51B standard is usually enforced through a hot work permit. Sparks travel through cracks, floor openings, and wall gaps, so check the other side. Keep an extinguisher within reach, and never strike an arc on a sealed drum or tank. Stick welding’s portability is one of its real advantages of stick welding, but field work is exactly where fire controls get improvised. Improvise the setup, never the precautions.

  Fumes: The Slowest Hazard

  The plume contains iron oxide, manganese, fluoride compounds from low-hydrogen coatings, hexavalent chromium from stainless electrodes, and zinc oxide from galvanized steel. The NIOSH welding criteria document details these exposures. OSHA Table Z-1 sets a manganese fume permissible exposure limit of 5 mg/m³ as a ceiling value, while ACGIH recommends a much lower respirable threshold limit value of 0.02 mg/m³. That gap matters. For stainless, OSHA’s hexavalent chromium standard at 29 CFR 1910.1026 sets a PEL of 5 micrograms per cubic meter as an 8-hour time-weighted average. The manganese limit appears in 29 CFR 1910.1000 Table Z-1.

  Ventilation comes first. Use local exhaust at the arc, keep the hood close to the plume, and add mechanical general ventilation where possible. OSHA’s welding standard at 29 CFR 1910.254 requires ventilation in confined spaces or wherever exposure limits could be exceeded. In a tank, pit, or closed shop, that means a permit, atmospheric testing, an attendant, and a rescue plan. Respiratory protection is the last line of defense: use a fitted respirator within a written program, and choose a PAPR or supplied air for high exposures.

  Short Note: Welding galvanized steel produces zinc oxide fume associated with metal fume fever, a recognized acute illness with flu-like symptoms that may appear hours later. Feeling fine at the end of a shift is not evidence that the exposure was safe. Remove coatings where practical, ventilate, and use respiratory protection when needed.

  Compliance is the floor, not the goal. A shop can meet every number and still leave workers exposed through poor hood placement or an untrained fire watch. The practical test is whether fume stays out of the breathing zone, sparks stay away from anything that can burn, and your body stays out of the circuit. If not, stop and fix the setup before the next rod.

  Getting Good at Stick Welding: A Practice Plan, Training Path and Certification

  Stick welding is easy to understand and hard to do. Most people who quit do it around their fourth or fifth hour with the stinger in hand, right when the beads start looking almost acceptable.

  Here is the honest comparison. With MIG, the machine feeds wire and largely holds arc length for you. With stick, you manage three things at once: arc length as the rod burns down, work and travel angle, and travel speed. Drop one and the bead tells on you. That is why twenty hours of focused stick practice beats two hundred hours of distracted practice.

  A Four-Week Practice Plan

  Budget about an hour per session, three sessions a week, plus a machine that runs 1/8-inch and 3/32-inch electrodes. You want clean scrap plate in 1/4-inch and 3/8-inch thickness, a 6011 or 6013 rod for early drills, and 7018 once you can hold a line. Keep a chipping hammer and wire brush within reach, and never drill on rusty or painted steel, because the arc will find the rust before it finds the joint.

  Week	Drill	Material	Success Criteria
  1	Pad of overlapping beads, flat	1/4 in plate	Uniform width, 50% overlap, slag lifts in one piece
  2	T-joints and lap joints, flat and horizontal	1/4 in plate	Equal legs, no undercut, visible fusion at the toe
  3	Vertical-up stringers, then a weave	3/8 in plate	Weave no wider than three rod diameters, no slag traps
  4	Restarts, tie-ins, open root with backing	3/8 in plate	Flush tie-ins, filled craters, no cracks

  How to Judge Your Own Beads

  You do not need an instructor over your shoulder for every pass. Learn to read the deposit the way a machinist reads a chip:

  • Ripples evenly spaced and consistent in height along the whole bead
  • Width holding steady, with no waisting or bulging
  • Toes wetting into the base metal, no undercut line
  • Slag that cracks and lifts cleanly at the edges instead of fusing
  • Crater filled at the end of the run, not left as a sunken fish-eye
  • Spatter sitting loose on the plate rather than welded flat

  Photograph every bead straight on and from the side. Two photos a week apart will show progress that felt invisible inside the booth.

  Reading Your Mistakes

  • Undercut: usually too much current or a travel angle leaning too far into the joint. Drop 5 to 10 amps and watch the arc force push the puddle.
  • Slag inclusions: travel too fast, or the previous pass was not cleaned to bare metal. Chip, brush, then look before you strike.
  • Porosity: damp 7018, a long arc, or a whipping motion that lets the shield gas blow away. Keep low-hydrogen rods dry and the arc tight.
  • Arc blow: move the ground clamp closer to the work, shorten the arc, or switch to AC if the machine offers it.

  Training Path and Certification

  Self-teaching works with a plan, but it works faster with feedback. A community college evening course or a short trade school block buys you supervised arc time and someone who can look at your root and tell you why it failed.

  For employment, certification matters more than a diploma, and the two are not the same thing. Structural work in the US is generally qualified under AWS D1.1, pipe under ASME Section IX, and most employers run their own in-house test to that code: a plate or pipe coupon welded in a set position (1G flat, 2G horizontal, 3G vertical, 4G overhead, 6G pipe), then cut, bent and inspected visually.

  Quick Note: A certificate is tied to the code, process and position you tested on. Change employers or move from plate to pipe and you will likely test again, so practice the test coupon itself, not just pretty beads.

  If you can run a clean vertical-up 7018 root and cover pass on 3/8-inch plate, you are ready to walk into most entry-level structural tests with a real chance. Get the arc time in first, then let the paperwork follow.

  Putting It All Together: A Practical Checklist and Final Thoughts

  Everything in this guide collapses into one habit: run the same short sequence every time you pick up a stinger. A checklist isn’t bureaucracy. It’s how experienced welders keep a good process from producing a bad weld.

  The Three-Stage Checklist

  Before the arc:

  • Confirm the electrode matches base metal, position and code requirement, not just what’s in the tin.
  • Check coating condition. Damp, chipped or rust-fouled rods get set aside, and E7018 comes out of a holding oven, not a damp toolbox.
  • Clean to bare, shiny metal at least an inch beyond the joint. Grind out cracks and old weld before you cover them.
  • Inspect leads, stinger insulation and ground clamp; clamp close to the joint on clean steel.
  • Set polarity and amperage for electrode diameter and plate thickness, and check duty cycle on small machines.

  During the weld: hold a steady arc length and travel angle, watch the edges of the puddle rather than the arc, and listen for that bacon-frying sound. Remove slag between every pass — never weld over it.

  After the weld: chip and brush, inspect for undercut, porosity and incomplete fusion, verify tie-ins and crater fill, then record electrode lot, settings and repairs when the work is governed by a procedure.

  Quick Note: Most stick welding failures trace back to preparation, moisture or travel speed, not the machine. A $2,000 inverter cannot rescue a dirty joint or a wet electrode.

  Back to the Trailer Hinge

  The torn gate hinge, done properly: grind old weld and paint off both hinge and trailer frame, clamp the hinge in alignment, tack in two places. For 1/8-inch mild steel in the flat or horizontal position, E6011 at around 90–110 amps runs well on dirty, galvanized-adjacent field steel; E7018 works if the machine is DC and the rods stayed dry. Set the ground clamp on the frame within a foot of the work, strike ahead of the tack and back into it, keep a tight arc, then finish with a slight weave to tie both edges. Chip the slag, check the toes for undercut, confirm the gate swings, touch up the paint. Ten minutes of preparation for ninety seconds of welding — the usual ratio.

  The Four Ideas That Matter Most

  1. Match the electrode to the job. A selection guide for alloy steel electrodes is worth reading before you buy a shelf of random rods.
  2. Control moisture and cleanliness. Electrode condition at the moment of welding matters as much as technique.
  3. Let current and travel speed do the work. Fighting the machine with body English never ends well.
  4. Never separate technique from safety. Shade, skin, ventilation and fire watch are part of the process, per OSHA’s welding guidance.

  When to Stop and Call Someone Qualified

  Structural members, pressure-retaining components, and anything that lifts or supports a load belong to qualified welders working to a qualified procedure. A written weld procedure specification defines electrode, current, position, preheat and technique, and under frameworks such as ASME Section IX it isn’t optional. If you can’t produce the WPS, or the part has already cracked twice, stop and get engineering input. Guessing on a lifting lug is how people get hurt.

  Stick welding rewards patience more than talent. If you’re learning, buy scrap plate instead of a project and burn rods until the bead width stops wandering, then move to MIG once you understand what a puddle is doing — our practical MIG welding guide is the natural next step. The process is old, loud and unfashionable, and it will still be the one that saves the night when the trailer gate gives out.

  Note: Keep learning with our related guides on electrode selection, the advantages of stick welding, and welding safety and fume control before your next job.

  Frequently Asked Questions

  Is MMAW the same as stick welding?

  Yes. MMAW stands for manual metal arc welding, which is the same process North Americans call shielded metal arc welding (SMAW) and everyone calls stick welding. All three names describe an arc struck between a flux-coated consumable electrode and the workpiece, with the coating generating the shielding gas and slag.

  Can I run E7018 on an AC machine?

  Most standard E7018 electrodes are designed to run on AC or DCEP, but arc quality and restarting are usually better on DC. Some classifications are DC-only, so check the manufacturer’s data sheet for the specific rod you bought before assuming it will run on your machine.

  Why does my E6010 electrode keep sticking to the plate?

  Cellulosic electrodes need enough current to sustain a forceful arc and a firm, short strike. Sticking usually means the amperage is too low, the ground clamp is poor, the plate is dirty, or the welder is hesitating at the strike instead of pulling away to establish arc length.

  Do I need a DC welder to stick weld?

  No. Many electrodes such as E6011, E6013, E7014 and most E7018 run on AC, which is why inexpensive AC buzz boxes remain popular. DC gives smoother arcs and access to electrodes like E6010 that are DC-only, so it is more versatile if your budget allows.

  What is the difference between E6013 and E7018?

  E6013 is a rutile electrode with a soft, easy arc and shallow penetration, well suited to thin sheet, light fabrication and beginners. E7018 is a low-hydrogen electrode with 70,000 psi tensile strength, better toughness and much stricter moisture control, making it the standard choice for structural and restrained joints.

  Can I weld stainless steel or aluminum with MMAW?

  Stainless steel is routinely welded with matching stainless electrodes such as E308L-16, though hexavalent chromium fume makes ventilation critical. Aluminum can technically be welded with specialized stick electrodes, but the process is difficult and rarely used compared with TIG or MIG.

  How thick can stick welding go?

  There is no hard upper limit; multi-pass stick welding is used on heavy plate and pipe with appropriate joint prep, preheat and procedure. The practical lower limit is around 18 to 20 gauge sheet, below which arc control and burn-through become difficult and MIG or TIG is a better fit.

  How long does it take to learn stick welding?

  Most people can strike an arc and run a rough bead within a few hours, but consistent, sound welds in all positions typically take weeks of deliberate practice. Passing a code qualification test usually requires months of structured training and many hours under supervision.

  Is it dangerous to stick weld galvanized steel?

  Welding galvanized steel produces zinc oxide fume that can cause metal fume fever, and the coating also interferes with weld quality. Grind the zinc away from the weld zone, weld with strong ventilation or fume extraction, and use appropriate respiratory protection rather than relying on a breeze.