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ERCuSi-A Silicon Bronze Welding Rod ANSI/AWS A5.7 Class ERCuSi-A ASME SFA-5.7 Class ERCuSi-A Description and Application Silicon Bronze is a copper alloy wire containing 3% silicon and used for GMAW, GTAW or Oxyacetylene Welding of copper, brass, bronze, steel and cast iron. Silicon Bronze is best known for welding plain or galvanized steel sheet metal in the manufacturing of steel cabinets, metal furniture and ductwork. Weld deposits demonstrate high strength, excellent corrosion resistance and good weldability, making this wire suitable for surfacing parts in corrosive environments. Approximate Melting Temperature: 1866F (1019C) Average As-Welded Brinell Hardness: 80 - 100 Brinell Tensile Strength: 51,000 psi Density: 0.308 lbs/in3 MIG welding with Silicon Bronze: it generally is best to keep the weld pool small and the interpass temperature below 150F (65C) to minimize heat cracking; the use of narrow weld passes reduces contraction stresses and also permits faster cooling through the hot-short temperature range. TIG welding with Silicon Bronze: best results are obtained by keeping the weld pool small; Preheating is not required; welding can be done in all positions, but the flat position is preferred. Oxyacetylene Welding: The oxyacetylene gas flame should be slightly oxidizing (neutral) to keep the weld puddle small in order to allow fast solidification and this will also minimize cracking; use a borax type flux both before and during welding; preheating is not recommended.
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⚠️ WARNING (California Proposition 65):This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.For more information, please visit www.P65Warnings.ca.gov.
