Can Copper be welded to Austenitic Stainless Steel?
Copper is readily welded to austenitic stainless steels with the Gas Tungsten Arc Welding (GTAW) by using suitable filler metals like ERCuAl-A2 or ERCu-Ni3. Welding is usually limited to thin sections, less than 3mm (0.13 in). Buttering is not needed, especially for thin sections. The heat has to be addressed to the higher conductivity metal (Copper). Preheating at 540 0C (1000 0F) may be used to reduce thermal stresses on the finished weldment. For Gas Metal Arc Welding, preferred for heavier thicknesses, the filler metals are the same as above, but one may wish to perform buttering by braze welding the stainless side to reduce dilution. Top Welding Copper to Stainless (B) [From PWL #56] Q: I would like to have information on how to effectively weld stainless to copper. In particular the pieces have cylindrical shapes. The 2 parts to be joined are cylindrical (equal dimensions) ranging from 1 to 10 mm. Materials are copper and stainless (different grades). A: It would be inappropriate
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