ER70S-3 is a copper-coated, solid carbon steel welding wire for general-purpose welding (GMAW/MIG & GTAW/TIG) on mild and low-alloy steels, known for stable arcs, low spatter, and good performance on clean surfaces, used in fabricating automotive parts, farm equipment, and trailers, featuring manganese and silicon deoxidizers for clean welds.
Key Characteristics:
Type: Solid, copper-coated mild steel wire.
Deoxidizers: Contains silicon (Si) and manganese (Mn).
Applications: General fabrication, automotive frames, farm/earthmoving equipment, sheet metal, trailers, and structural components.
Welding Processes: Suitable for Gas Metal Arc Welding (GMAW/MIG) and Gas Tungsten Arc Welding (GTAW/TIG).
Shielding Gas: Works well with 100% CO2, Argon/CO2 mixtures, and Argon/Oxygen mixtures.
Performance: Provides a smooth, stable arc with minimal spatter, ideal for high-speed spray transfers or short-arc applications.
Weld Quality: Offers excellent welder appeal and often results in slag-free welds, requiring less post-weld cleanup.
Chemical Composition (Typical):
Carbon (C): ~0.06-0.10%
Manganese (Mn): ~1.25-1.50%
Silicon (Si): ~0.55-0.80%
Phosphorus (P): <0.025%
Sulfur (S): <0.025%
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