6010 vs 6011 vs 6013 vs 7018: Which Stick Welding Rod Do You Need?

E6010 is your dirty-metal, deep-penetration pipe rod that runs DCEP only. E6011 does the same job on AC machines. E6013 is the smooth, easy-to-run beginner rod with shallow penetration. E7018 is the structural workhorse with low-hydrogen properties that prevent cracking. Each rod fills a different role, and no single one replaces the others.

These four electrodes cover about 90% of all stick welding work in the field and shop. Understanding what each one does well (and where it fails) means you’ll pick the right rod the first time instead of fighting the arc or chasing defects.

Quick Comparison Table

E6010: The Pipe Welder’s Rod

E6010 is the industry standard for pipeline root passes, field repairs on dirty steel, and any situation where you need to burn through contamination and still get full penetration. Its high-cellulose sodium coating generates a forceful, digging arc that blasts through rust, mill scale, paint, and light oil.

What 6010 Does Best

The whip-and-pause technique with 6010 on an open-root pipe joint creates the classic “keyhole” that pipeline welders rely on. The fast-freeze puddle solidifies quickly, letting you control the root bead in any position around the pipe. No other rod handles this task as well.

6010 also excels at repair welding where you can’t (or don’t want to) grind every surface clean. Farm equipment caked in grease and dirt, structural repairs on painted steel, field repairs on rusted-out equipment: 6010 punches through it all.

What 6010 Doesn’t Do Well

It won’t run on AC. Period. The sodium binder in the coating can’t maintain arc stability through the zero-crossing points of alternating current. If your machine is AC-only, you need E6011.

The bead appearance is rough compared to 7018 or 6013. Spatter is heavy. Slag is thin and sometimes hard to see, which can lead to slag inclusions if you don’t clean thoroughly between passes.

6010 at 1/8" diameter runs 75-130 amps on DCEP. It’s an all-position rod, but the aggressive arc makes it overkill for simple fillet welds on clean steel.

E6011: The AC Alternative to 6010

E6011 is essentially 6010 reformulated to run on AC. The potassium binder in the coating ionizes at lower voltages than sodium, allowing the arc to re-establish itself 120 times per second as the current alternates.

When to Choose 6011 Over 6010

If your machine outputs AC only (older Lincoln “buzz boxes,” some engine-driven welders on AC mode), 6011 is your deep-penetration option. It gives you roughly the same digging action, the same ability to burn through dirty metal, and the same fast-freeze puddle.

On DCEP, 6011 runs slightly smoother than 6010 but with marginally less penetration. Most welders who have access to clean DC prefer 6010. But on AC, 6011 is the clear winner because 6010 isn’t an option.

What 6011 Doesn’t Do Well

Same limitations as 6010: rough bead appearance, heavy spatter, thin slag that can be missed during cleaning. On AC, the arc is noticeably rougher than on DCEP, with more spatter and more noise. That’s the nature of AC welding with any rod.

E6011 at 1/8" diameter runs 75-125 amps. It’s slightly lower at the top end than 6010 because the potassium coating runs a bit hotter.

E6013: The Beginner-Friendly Rod

E6013 runs on anything: AC, DCEP, or DCEN. It strikes easily (often described as a “light switch” start), maintains a stable arc even with long arc length, produces minimal spatter, and lays down a smooth, flat bead with a heavy slag that practically peels itself off.

What 6013 Does Best

Learning to weld. If you’ve never struck an arc before, 6013 is where you start. It forgives the two most common beginner mistakes: holding too long an arc and inconsistent travel speed. The rutile coating keeps the arc stable even when your technique wavers.

Beyond practice, 6013 is legitimately useful for thin material (16 gauge and up), cosmetic welds where appearance matters more than strength, light fabrication, and any job where you need a smooth bead without grinding.

What 6013 Doesn’t Do Well

Structural work. The shallow penetration means it doesn’t fuse deeply into the base metal. On a qualification test requiring bend specimens, 6013 welds fail more often than 7018. It’s not specified for structural work under AWS D1.1.

Dirty metal. Unlike 6010/6011, E6013 can’t burn through significant rust, mill scale, or paint. It needs reasonably clean steel to produce sound welds.

Pipe welding. The shallow penetration and fluid puddle make 6013 a poor choice for root passes on open-root joints. It can’t create the keyhole penetration that pipe codes require.

E6013 at 1/8" runs 80-130 amps. Its broad operating range on any polarity makes it the most machine-compatible rod in this comparison.

E7018: The Structural Standard

E7018 is the most widely used stick electrode in construction, fabrication, and manufacturing. Its low-hydrogen coating produces crack-free welds in medium-carbon and high-strength steels where cellulosic or rutile rods would cause hydrogen-induced cracking.

What 7018 Does Best

Structural steel connections governed by AWS D1.1. Bridge construction, building steel, pressure vessels, heavy equipment frames, anywhere the weld must meet code and pass inspection. The 70,000 PSI tensile strength overmatches A36 steel, and the low-hydrogen deposit resists cracking even in thick, heavily restrained joints.

7018 also produces an excellent bead profile. The iron powder in the coating boosts deposition rate and creates a smooth, convex bead with self-peeling slag. For fill and cap passes on pipe, 7018 gives a far better appearance than 6010.

What 7018 Doesn’t Do Well

Dirty metal. Low-hydrogen coatings are sensitive to surface contamination. Rust, oil, paint, and mill scale introduce moisture and hydrocarbons that cause porosity. 7018 demands clean, ground, or blasted surfaces.

Pipe root passes. The medium penetration and fluid puddle can’t create the keyhole that open-root pipe joints require. Standard practice is 6010 for the root, then 7018 for hot pass, fill, and cap.

Field work without rod storage. Once you crack the seal on a can of 7018, those rods start absorbing moisture. In humid environments, they can pick up enough water in 4-8 hours to cause porosity. You need a rod oven on any job site using 7018.

E7018 at 1/8" runs 110-165 amps on AC or DCEP. It needs slightly more amperage than 6010 or 6013 at the same diameter because the iron powder coating requires more heat to melt.

Penetration Profiles Compared

Understanding how each rod penetrates the base metal helps you choose the right one for the joint design.

E6010/E6011: Deep, narrow penetration profile. The digging arc concentrates heat into a small area, melting deep into the base metal. This is why they excel at root passes. The weld pool freezes fast (fast-freeze), so it holds in place on vertical and overhead joints.

E6013: Shallow, wide penetration profile. The smooth arc spreads heat across a broader area but doesn’t dig deep. Good for lap joints, light fillets, and sheet metal where you want fusion without blow-through.

E7018: Medium-depth, medium-width penetration. Deeper than E6013 but not as aggressive as E6010. The fluid puddle wets out to the toes of the joint nicely, producing good fusion on prepped groove welds and fillets.

AC vs DC: Which Rods Run on What?

Your machine’s output determines which rods you can run. Here’s the breakdown:

DCEP (electrode positive) gives the deepest penetration for all rods. DCEN (electrode negative) reduces penetration and speeds up deposition, but only E6013 is commonly run on DCEN. For more detail on polarity effects, see AC vs DC Stick Welding.

Application Decision Guide

Pipeline and pipe welding: E6010 root pass (DCEP), E7018 fill and cap. If AC-only machine, substitute E6011 for the root.

Structural steel (AWS D1.1): E7018 for everything unless the WPS specifies otherwise. Prequalified WPS procedures in D1.1 almost universally call for low-hydrogen electrodes.

Farm and ranch repair: E6011 (runs on the AC buzz box that’s been in the barn for 30 years). Switch to E6010 if you upgrade to a DC machine.

Learning to weld: Start with E6013 to build fundamentals. Move to E7018 once you can run consistent beads. Then try E6010 to develop the whip-and-pause technique.

Thin material (16 gauge to 1/8"): E6013 at 3/32" diameter, low amperage. See Stick Welding Thin Metal for technique details.

Dirty, rusty, or painted steel: E6010 (DCEP) or E6011 (AC). These are the only rods that reliably burn through surface contamination. See Stick Welding Rusty Metal for specifics.

Outdoor/windy conditions: Any stick rod beats MIG or TIG in wind, but E6010/E6011 handle the worst conditions because their gas-heavy shield recovers quickly from wind disruption. See Stick Welding in Wind.

Common Problems and Troubleshooting

Porosity with E7018: Check rod storage first. Moisture-contaminated 7018 is the number one cause of porosity in structural stick welding. Also check for surface contamination on the base metal.

Can’t strike E6010: Amperage too low, or you’re trying to run it on AC. E6010 needs DCEP and enough amps to establish the arc. At 1/8", start at 90 amps and work up.

E6013 won’t penetrate: That’s by design. E6013 has shallow penetration. If you need deeper fusion, switch to E7018 or E6010. Cranking up the amps on 6013 just makes the puddle wider, not deeper.

Heavy spatter with E6010/E6011: Shorten your arc length. These rods spatter more at longer arc lengths. Keep the arc at one rod-core-wire diameter (about 3/32" for a 1/8" rod).

Slag inclusions in multi-pass welds: Clean each pass completely before welding the next. With 7018, the heavy slag can trap in the toes of the weld if your bead profile is too convex. Adjust travel speed to flatten the bead crown.

Arc blow with DC: Switch to AC if possible, or change your ground clamp position. 7018, 6011, and 6013 all run on AC. If you must stay on DC, reduce the arc length and adjust your electrode angle to push the arc toward the joint. See Stick Welding Common Defects for a full arc blow discussion.

Stocking Your Rod Selection

For a home shop or small fabrication shop, keep these four rods on hand:

• 1/8" E6011 (10 lb can): General-purpose, dirty metal, repairs
• 1/8" E6013 (10 lb can): Thin material, practice, cosmetic work
• 1/8" E7018 (10 lb can): Structural, heavy work, strongest welds
• 3/32" E6013 (5 lb can): Sheet metal, delicate work

Add 3/32" and 5/32" E7018 if you do a range of material thicknesses. Add E6010 if you have a DC machine and do pipe work or heavy dirty-metal repairs. A rod oven is mandatory if you stock 7018 for structural work.