HYW Products' ERCuSi-A Silicon Bronze MIG welding wire is a copper-silicon filler metal (AWS A5.7/A5.7M ERCuSi-A) for GMAW (MIG) welding and MIG brazing. Widely used in automotive sheet-metal repair, it deposits at low heat to braze-weld galvanized and high-strength steels without burning through, while delivering excellent corrosion resistance on copper, brass, and bronze.
Low-heat MIG brazing reduces distortion and preserves zinc coatings
Smooth, stable arc with excellent bead wetting and minimal spatter
Strong corrosion resistance for marine and freshwater service
Runs on 100% argon shielding, DCEP (reverse polarity)
Precision layer-wound rolls and spools for consistent feeding
Ideal Applications
Automotive body panel and sheet-metal MIG brazing
Joining galvanized, zinc-coated, and high-strength steels
Welding copper, brass, and silicon bronze
Corrosion-resistant overlays and build-up
HVAC, marine, and ornamental fabrication
Technical Specifications
Property
Value
AWS Classification
AWS A5.7/A5.7M ERCuSi-A
Welding Process
GMAW (MIG) / MIG braze
Nominal Composition
Cu remainder, Si 2.8–4.0%, Mn 1.5% max, Sn 1.0% max
Tensile Strength (typ.)
~50,000 psi (345 MPa)
Density
~0.308 lb/in³ (8.5 g/cm³)
Shielding Gas
100% Argon
Polarity
DCEP (DC reverse, electrode positive)
Available Sizes & Recommended Amperage
Diameter
Recommended Amperage (DCEP, Argon)
.023" (0.6 mm)
40–120 A
.030" (0.8 mm)
60–160 A
.035" (0.9 mm)
80–200 A
Available packaging: 2 lb roll, 2 lb roll (2-pack), 2 lb roll (5-pack), 10 lb spool, and 10 lb spool (2-pack).
Store in a clean, dry location and keep wire free of oil, grease, and moisture to ensure optimal feeding and weld quality. Amperage values are general starting points — adjust for joint design, base-metal thickness, and welding position.
WARNING
This product can expose you to chemicals including manganese, which is known to the State of California to cause birth defects or other reproductive harm. Welding fumes from this product can also expose you to chemicals known to cause cancer. For more information go to www.P65Warnings.ca.gov.
