ER70S-6 MIG Wire (Select Spool Size & Diameter)

GTW by Weldmark ER70S-6 MIG Welding Wire – Precision Layer-Wound, Copper-Coated Carbon Steel

GTW by Weldmark ER70S-6 is a premium-grade solid MIG welding wire engineered for maximum performance in carbon steel applications. Copper-coated for enhanced conductivity and reduced wear, this wire is available in diameters ranging from .023" to .045" and comes in spool sizes from 2 lbs to 44 lbs, making it suitable for everything from light fabrication to high-volume production work.

Formulated with elevated levels of manganese and silicon, Weldmark ER70S-6 delivers exceptional weld puddle control and superior wetting action. This ensures consistent, high-strength welds—even on surfaces contaminated with light rust, oil, or dirt. The higher silicon content also produces a smoother, cleaner bead appearance, minimizing post-weld finishing time.

Weldmark ER70S-6 wire produces low spatter and porosity-free welds with X-ray quality integrity. Its high tensile strength makes it ideal for structural steel, automotive work, and general fabrication. Compatible with common shielding gases such as 100% CO₂, 75/25 Ar/CO₂, or Ar/O₂ mixtures, this wire provides excellent versatility and weld quality across a variety of welding conditions.

Key Benefits:

• Copper-coated for smooth feeding and extended tip life

• High silicon and manganese content for improved weld puddle fluidity

• Produces X-ray quality welds with minimal spatter

• Excellent on lightly contaminated base metals

• Compatible with multiple shielding gas combinations

• Available in .023", .030", .035", and .045" diameters on 2–44 lb spools

Perfect for fabricators, repair shops, and industrial welders seeking reliable performance, Weldmark ER70S-6 is a trusted choice for clean, strong welds in demanding environments.