E71T-GS Flux-Core Wire: Settings & Single-Pass Guide
E71T-GS Amperage by Diameter
| Diameter | Amperage Range |
|---|---|
| 0.030" (0.8 mm) | 25 - 110A |
| 0.035" (0.9 mm) | 35 - 150A |
E71T-GS is the flux-core wire you find in small spools at hardware stores and home centers. It is designed for single-pass welds on thin mild steel with small 110V flux-core welders. It works for home projects, auto body patches, and light repairs, but it is not classified for multi-pass welding and should not be used on anything structural or load-bearing.
What This Means in Practice
E71T-GS is designed for single-pass welds on thin material. The 'GS' means it is a general specification wire, not tested to the multi-pass standards that E71T-11 meets. In practice, this means you should not use it for structural multi-pass welds. It excels at light gauge sheet metal, exhaust work, and small fabrication projects where a gas bottle is impractical.
E71T-GS Suitability Scores
How well this electrode matches common applications. Not a quality rating. all AWS-certified electrodes meet their specification.
When to Use E71T-GS
Single-pass welds on thin mild steel (20 gauge to 3/16 inch).
Light-duty fabrication and home projects.
Small portable flux-core welders (110V machines).
Quick repairs where you do not have gas available.
E71T-GS Limitations
Single-pass only per AWS classification.
Not tested or classified for multi-pass welding, meaning mechanical properties are unpredictable beyond one pass.
Not interchangeable with E71T-11 for multi-pass or structural applications.
Limited to thin material.
E71T-GS Storage Requirements
Store in dry area. Protect from moisture.
E71T-GS Technical Specifications
| Property | Value |
|---|---|
| AWS Classification | E71T-GS |
| Process | Flux-Core Welding (FCAW) |
| Polarity | DCEN |
| Positions | flat, horizontal, vertical up, overhead |
| Penetration | light |
| Coating Type | self-shielded flux-cored |
| Tensile Strength | 70,000 psi |
| Yield Strength | 58,000 psi |
| Elongation | 22% |
| Base Metals | carbon steel, low-carbon steel |
| Shielding Gas | None (self-shielded) |
| AWS Specification | A5.20 |
E71T-GS Questions
What flux core wire for a 110V welder?
E71T-GS in 0.030 inch diameter. This is the wire sold in small spools at hardware stores specifically for 110V flux-core welders. It is designed for single-pass welds on thin mild steel (up to about 3/16 inch). It works without gas and is fine for home projects, auto body patches, and light repairs. For anything thicker or multi-pass, you need E71T-11 on a 220V machine. For heavier work, E71T-11 specifications on a 220V machine handles multi-pass welds and thicker material.
What does GS mean in E71T-GS?
GS stands for General Single-pass. This wire is classified only for single-pass welding and does not have minimum impact toughness requirements. For multi-pass work or applications requiring impact testing, use E71T-11 instead.
Can E71T-GS be used for multi-pass welding?
It is not recommended. E71T-GS is classified for single-pass use only. Multi-pass welding with E71T-GS can cause excessive manganese buildup in the weld, reducing toughness. Use E71T-11 for multi-pass applications.
Where to Buy E71T-GS
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External Resources
Manufacturer data sheets and standards for E71T-GS.
Data sourced from AWS A5.20/A5.20M. Amperage ranges are approximate starting points. adjust based on position, fit-up, and material thickness. Always follow manufacturer recommendations and applicable codes.