Washington Alloy, TCU SB 120, Welding Filler Metal, 0.035 in, Silicon Bronze, ERCuSi-A

Washington Alloy Silicon Bronze is a copper-based filler metal containing 3% silicon and small amounts of manganese, tin, and zinc. Primarily used for MIG, TIG, and oxyacetylene welding of copper, copper-silicon, and copper-zinc base metals to themselves and to steel. The oxyacetylene gas flame should be slightly oxidizing. Keep the weld puddle small in order to promote fast solidification and minimize cracking. A high boric acid flux should be used both before and during welding. Preheating is NOT recommended.

• Diameter: 0.035 in.
• Weight: 250 lb
• Alloy: ERCuSi-A
• Material: Silicon Bronze
• AWS Specification: AWS A5.27 RcuSi-A
• Silicon Content: 2.8-4.0%
• Additional Elements: Manganese, Tin, Zinc
• Solidus Temperature: 1780 F
• Liquidus Temperature: 1880 F
• Electrical Conductivity: 7.0% IACS annealed
• Density: 0.308 lbs/in3
• Thermal Conductivity: 21 Btu
• Elongation: 65%
• Tensile Strength: 50,000 psi
• Brinell Hardness: 80-100

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