Washington Alloy, TCU SB/00, Silicon Bronze Filler Metal, 0.023 in; 36 in, Copper-based, 3% Silicon

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.

• Size: 0.023 in.
• Length: 36 in
• Material: Copper-based Silicon Bronze
• Tensile Strength: 50,000 psi
• Elongation: 65%
• Brinell Hardness: 80-100
• Electrical Conductivity: 7.0% IACS
• Density: 0.308 lbs/in3
• Thermal Conductivity: 21 Btu
• Silicon Content: 3%
• Other Elements: Manganese, Tin, Zinc (small amounts)
• Chemical Composition Limits: Zinc 1.00%, Manganese 1.50%, Silicon 2.8-4.0%, Iron 0.50%, Aluminum 0.01%, Lead 0.02%, Tin 1.00%, Copper Remainder
• AWS Specification: AWS A5.27 RcuSi-A
• ANSI/AWS Specification: ANSI/AWS A5.7 ERCuSi-A
• ASME Specification: ASME SFA 5.7 ERCuSi-A

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