Chemical components

Product Description

ER70S-6 is a premium solid mild steel welding wire compliant with AWS A5.18 standards, designed for gas metal arc welding (GMAW/MIG) and gas tungsten arc welding (GTAW/TIG) of mild and low-alloy steels. Featuring a high-purity composition with 0.06-0.15% carbon, 1.40-1.85% manganese, and 0.80-1.15% silicon, it excels in providing excellent deoxidation and weld metal fluidity. The enhanced deoxidizers (Si, Mn) eliminate porosity and inclusions, making it ideal for welding on dirty or mill-scale surfaces without extensive pre-cleaning. Compatible with 75% Argon/25% CO2 or 100% CO2 shielding gases, it produces smooth, spatter-free welds with excellent bead appearance.

Features

▪ Superior Deoxidation: The high silicon (0.80-1.15%) and manganese (1.40-1.85%) content provides excellent deoxidation, effectively removing oxygen from the weld pool. This prevents porosity and inclusions even when welding on surfaces with light rust, mill scale, or oil contamination.
▪ Excellent Weld Metal Properties: Delivers tensile strength of 480-660 MPa, yield strength ≥400 MPa, and elongation ≥22%. The balanced composition ensures mechanical properties matching typical mild steel base materials including ASTM A36, A515, and similar grades.
▪ Smooth Arc Characteristics: Produces a stable, smooth arc with minimal spatter and excellent bead wetting. The wire feeds smoothly through MIG guns and provides consistent droplet transfer for high-quality weld appearance in all positions.
▪ Versatile Gas Compatibility: Performs well with both 75% Ar/25% CO2 (most common) and 100% CO2 shielding gases. The argon-rich mixture provides smoother operation and less spatter, while CO2 offers deeper penetration and higher deposition rates.

Applications

▪ Ideal for general fabrication and applications requiring clean, high-quality MIG welds on mild steel, ER70S-6 is widely used in:
▪ Automotive Industry: Body panels, frame components, and automotive assembly requiring clean, spatter-free welds with excellent appearance. Suitable for welding galvanized and coated steels.
▪ General Fabrication: Structural steel, tanks, frames, and light manufacturing requiring efficient MIG welding with minimal joint preparation. Excellent for production welding environments.
▪ Maintenance & Repair: Field repairs, equipment fabrication, and general maintenance work where weld quality and appearance are important. Effective on surfaces that cannot be thoroughly cleaned before welding.
▪ Construction & Light Fabrication: Light structural work, handrails, gates, and miscellaneous metal fabrication requiring clean, visually appealing welds.