Washington Alloy, TCU SB 01, Filler Metal, .023 in, Copper-based; Silicon Bronze; AWS A5.27 RcuSi-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.

• AWS Specification: AWS A5.27 RcuSi-A, ANSI/AWS A5.7 ERCuSi-A
• ASME Specification: ASME SFA 5.7 ERCuSi-A
• Material: Copper-based, Silicon Bronze
• Size: .023 in.
• Weight: 2 lb
• Silicon Content: 3%
• Manganese Content: 1.5% max
• Tin Content: 1.0% max
• Zinc Content: 1.0% max
• Lead Content: 0.02% max
• Iron Content: 0.5% max
• Aluminum Content: 0.01% max
• 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

Downloads