HYW Products' ERCuSi-A Silicon Bronze TIG welding rod is a copper-silicon filler metal (AWS A5.7/A5.7M ERCuSi-A) supplied in 36" cut lengths for GTAW (TIG) welding and braze welding. Its low melting point and excellent flow make it ideal for joining and surfacing copper, brass, and galvanized or coated steels with minimal heat input — reducing burn-through and distortion on thin sheet.
Low heat input minimizes warping and burn-through on thin-gauge sheet metal
Excellent wetting and flow for clean, strong braze-welded joints
Strong corrosion resistance in marine and freshwater environments
Runs on 100% argon shielding, DCEN (straight polarity) for TIG
36" precision-cut rods available in multiple diameters and pack sizes
Ideal Applications
Braze welding galvanized, zinc-coated, and mild steel sheet
Auto body and sheet-metal repair where low distortion is critical
Joining copper, brass, and silicon bronze base metals
Corrosion-resistant surfacing and overlay
Marine hardware, tanks, and ornamental metalwork
Technical Specifications
Property
Value
AWS Classification
AWS A5.7/A5.7M ERCuSi-A
Welding Process
GTAW (TIG)
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
DCEN (DC straight, electrode negative)
Rod Length
36"
Available Sizes & Recommended Amperage
Diameter
Recommended Amperage (DCEN, Argon)
1/16" (1.6 mm)
50–110 A
3/32" (2.4 mm)
90–150 A
1/8" (3.2 mm)
120–200 A
Available pack sizes: 1/2 lb (8 oz), 1 lb, 2 lb, 5 lb, and 10 lb.
Store in a clean, dry location and keep rods free of oil, grease, and moisture to ensure optimal 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.
