SB030-10 - Techniweld Silicon Bronze MIG Wire .030 10lb Spool ERCuSi-A

Industrial Grade Silicon Bronze MIG Wire

The Techniweld Silicon Bronze (ERCuSi-A) MIG welding wire is a copper-based alloy containing approximately 3% silicon and small amounts of manganese, tin, and zinc. This composition is specifically engineered for the Gas Metal Arc Welding (GMAW) process, commonly referred to as MIG welding. The primary metallurgical advantage of this alloy is its ability to provide high strength and excellent corrosion resistance while maintaining a relatively low melting point compared to ferrous filler metals. This wire is manufactured to meet AWS A5.7 specifications, ensuring consistent chemical composition and mechanical properties for critical industrial applications.

Silicon Bronze is frequently utilized for joining copper, brass, and bronze base metals. However, its utility extends significantly into the fabrication of ferrous metals, particularly in the surfacing of steel and the joining of galvanized steel sheets. The silicon content promotes deoxidation, which helps in producing sound, porosity-free welds. When used on galvanized steel, the lower heat input required for silicon bronze reduces the disturbance of the zinc coating, thereby maintaining the corrosion-resistant properties of the base material better than standard steel wires. This 10lb spool is precision-wound to ensure consistent wire feeding and arc stability, reducing downtime in automated or manual production environments.

Technical Specifications:

• Alloy: ERCuSi-A (Copper-Silicon)


• Diameter: 0.030 inches


• Shielding Gas: 100% Argon is required to prevent oxidation and ensure a stable spray or short-circuit transfer.


• Current: DCEP (Direct Current Electrode Positive).

This product is an essential consumable for fabrication shops dealing with HVAC components, electrical enclosures, and marine hardware where corrosion resistance and thermal conductivity are paramount.