RWMA Copper Alloys

Zirconium Copper is used in spot welding electrodes and seam weld wheels. It is particularly useful when welding galvanized materials because of its high thermal conductivity, which prevents sticking.

Chromium Copper is the primary copper alloy for high level production spot and seam welding of clean mild steel, low alloy steels, stainless steel, low conductivity brasses and bronzes, nickel-silver, nickel, nickel alloys, and monel. It is also suitable for projection welding dies, seam welder shafts and bearings, flash and butt welding dies, and current-carrying structural members.

Chromium Zirconium Copper is used as an electrode material for welding galvanized steel and other metallic-coated materials. It has improved creep resistance at high operating temperatures.

Class 3 Beryllium Free Copper is a very hard, heat-treatable copper with moderate electrical conductivity that is ideal for use as seam weld wheels, projection welding dies, flash and butt welding dies, current-carrying shafts and bushings, high stressed structural current-carrying members, electrode holders, and high pressure electrodes where the welded material has a high electrical resistance.

Class 3 Beryllium Copper is heat-treatable with moderate electrical and thermal conductivity and high tensile strength. It is recommended for projection welding dies, flash and butt welding dies, current-carrying members, and heavy-duty offset electrode holders. It is also generally recommended for spot and steam welding steels with high electrical resistance, such as stainless steel.