4470S6030 - ER70S-6 Mild Steel MIG Welding Wire, 0.030 in, 33 lb Spool

Premium ER70S-6 Mild Steel MIG Wire

The ER70S-6 .030" MIG Welding Wire (33 lb Spool) is a high-quality, general-purpose solid wire designed for the Gas Metal Arc Welding (GMAW) of mild and carbon steels. As an S-6 classification wire, it is formulated with higher levels of manganese and silicon compared to S-3 or S-2 wires. These added deoxidizers act as powerful cleaning agents within the weld puddle, making this wire exceptionally forgiving when welding on base metals that may have light rust, mill scale, oil, or other surface contaminants.

Engineered for professional fabrication, this wire features a precision copper coating that enhances electrical conductivity at the contact tip and prevents corrosion during storage. The smooth finish ensures consistent feedability through the liner and gun, minimizing bird-nesting and arc instability. It produces a smooth, stable arc with low spatter, resulting in high-quality weld beads that require minimal post-weld grinding or cleanup. This wire is suitable for all-position welding when used with the appropriate short-circuit transfer settings.

This 33 lb (15 kg) spool is designed to fit standard industrial wire feeders and larger MIG machines with 12-inch spool hubs. It is an ideal choice for structural steel fabrication, automotive repairs, general maintenance, and manufacturing where efficiency and weld integrity are paramount. It operates effectively with both 100% CO2 shielding gas (for deeper penetration) and Argon/CO2 blends (for a smoother arc and reduced spatter).

Technical Specifications

• AWS Classification: ER70S-6
• Diameter: 0.030 inches (0.8 mm)
• Tensile Strength: Typically 70,000+ PSI (depending on gas)
• Shielding Gas: 100% CO2 or 75% Ar / 25% CO2