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Stick welding amperage is not a single setting for each rod. The useful range depends on electrode type, diameter, joint fit-up, welding position, arc length, and whether the machine is running AC or DC. Use the charts below as starting points, then adjust while watching the arc and weld puddle.
How to Use These Amperage Charts
Start near the middle of the listed range. If the rod sticks repeatedly, the arc sounds weak, or the puddle barely wets the edges, increase amperage in 5- to 10-amp steps. If the rod burns too quickly, the puddle is difficult to control, or the base metal is undercutting, reduce the setting.
Thin material usually requires less amperage and a smaller electrode. Thick material does not automatically require the highest setting; joint design, preheating, and multiple passes also determine the result. A 1/8-inch rod may weld 1/8-inch steel successfully, but a properly prepared 1/4-inch joint will normally need several passes rather than one oversized pass.
6010 and 6011 Amperage Chart
6010 is a forceful, deep-penetrating rod commonly used on DC+, while 6011 is designed to run on AC and can also run on DC+. Both tolerate some mill scale and less-than-perfect preparation, but they produce more spatter and a rougher bead than 7018.
| Electrode diameter | Typical amperage | Common use |
|---|---|---|
| 3/32 inch | 40–85 A | Thin steel, root passes, small repairs |
| 1/8 inch | 75–125 A | General-purpose structural and repair work |
| 5/32 inch | 110–160 A | Thicker steel and high-deposition passes |
| 3/16 inch | 140–210 A | Heavy sections and larger machines |
6010 and 6011 work well for an open-root pipe-style joint or rusty farm equipment, but they are not the easiest rods for a beginner. Use a short arc and maintain the rod angle recommended for the joint. Excessive amperage can create a deep, narrow groove and leave undercut along the edges.
6013 Amperage Chart
6013 electrodes have a softer arc and smoother appearance than 6010 or 6011. They are a good choice for light fabrication, sheet metal repairs, and general mild-steel work when deep penetration is not the main goal. They run on AC, DC+, or DC-, depending on the electrode manufacturer’s instructions.
| Electrode diameter | Typical amperage | Practical starting point |
|---|---|---|
| 3/32 inch | 40–90 A | 60–70 A |
| 1/8 inch | 80–130 A | 95–110 A |
| 5/32 inch | 120–180 A | 135–155 A |
| 3/16 inch | 160–240 A | 180–200 A |
For thin sheet, a 3/32-inch 6013 at roughly 45 to 65 amps is usually easier to control than a 1/8-inch rod. Even then, use short welds and allow the work to cool. Holding a continuous bead on thin material is a common way to produce burn-through and distortion.
7018 Amperage Chart
7018 is a low-hydrogen electrode used where stronger, cleaner welds are required. It produces a smooth bead with good mechanical properties, but it needs cleaner steel and better storage than general-purpose rods. Follow the package directions for polarity; many 7018 rods run best on DC+ or AC.
| Electrode diameter | Typical amperage | Typical starting point |
|---|---|---|
| 3/32 inch | 70–100 A | 80–90 A |
| 1/8 inch | 90–140 A | 110–120 A |
| 5/32 inch | 130–190 A | 145–165 A |
| 3/16 inch | 180–250 A | 200–220 A |
7018 is less forgiving when stored damp. Moisture can contribute to porosity and hydrogen-related cracking, especially in critical work. For occasional home repairs, buy a small package and keep unused rods sealed. A rod oven is useful for frequent structural welding, but it is unnecessary for many casual projects if the electrodes are bought in small quantities and stored correctly.
Adjusting Amperage by Welding Position
Flat welding generally allows the highest amperage because the puddle is supported by the workpiece. Reduce the setting for horizontal, vertical, and overhead welding, often by 5 to 15 amps. Smaller rods are easier to control in these positions. For vertical-up work, a tight arc, controlled travel speed, and a smaller puddle matter as much as the dial setting.
If the weld is excessively wide and flat, reduce amperage or increase travel speed. If it is tall, narrow, and cold-looking, increase amperage slightly or slow down. A slag inclusion often results from poor cleaning between passes, an incorrect rod angle, or trapping slag at the toes—not simply from using the wrong amperage.
Choosing a Stick Welder for These Rods
A compact inverter stick welder rated around 160 to 200 amps is sufficient for most 3/32- and 1/8-inch electrodes. It should have a stable low-amp range for small rods and enough duty cycle for repeated passes. A basic AC machine can be inexpensive and durable, but a DC inverter usually offers an easier arc, lower weight, and better control.
When comparing 200-amp inverter stick welders, check the rated output at its duty cycle rather than trusting the maximum number alone. A machine that reaches 200 amps briefly may be less useful than one that can sustain 140 to 160 amps without overheating.
Safety and Setup Checks
Use a properly rated auto-darkening welding helmet, leather gloves, flame-resistant clothing, and adequate ventilation. Remove paint, oil, and galvanized coatings from the weld area; zinc fumes are hazardous. Confirm the work clamp has clean contact, use cables large enough for the output, and inspect the electrode holder before welding.
Finally, read the electrode manufacturer’s label. Published ranges vary slightly between brands, and the package instructions take priority over any general chart. Make a short test bead on similar scrap, chip the slag, and inspect penetration and profile before committing to the actual part.