​​​​​​​​​​​​​​​​​​​C15000 COPPER ZIRCONIUM - RWMA CLASS 1 a small addition of zirconium to copper improves resistance to softening and resists deformation at high temperatures where normal copper would soften rapidly. Zirconium Copper is used as a class 1 electrode material to minimize sticking when resistance spot welding galvanized materials. Zirconium Copper is also used in many high temperature applications i.e. aerospace, power generation, etc. C15000 Copper Zirconium is used for electrodes for welding aluminum alloys, magnesium alloys, coated materials, brass and bronzes. C15000 copper can be used for both spot and seam welding.​

 

C18150 COPPER CHROMIUM ZIRCONIUM - RWMA CLASS 2 The zirconium addition to chromium copper improves creep resistance at high operating temperatures and reduces sticking of electrodes to the work during spot welding of galvanized materials. C18150 is specified mainly for electrode applications. C18150 specifically is for cap style resistance welding electrodes and weld wheels. This alloy is used for spot and seam welding of cold and hot rolled steel, stainless steel and low conductivity brass and bronze. They are also used as flash welding dies, and as electrodes for the welding of galvanized steel and other coated materials. C18150 Chromium-Zirconium Copper conforms to specifications SAE J461,463；RWMA Class 2, ISO5182-1991

 

C18200 CHROMIUM COPPER - RWMA CLASS 2 is a heat treatable, corrosion resistant alloy which combines high electrical conductivity with high strength. Class 2 chrome copper is a superior resistance welding electrode material specifically recommended for high-level production spot welding and seam welding of clean mild steels, low alloy steels, low conductivity brasses, and bronzes. Typical applications include projection welding dies, seam welder shafts and bearings, flash and butt welding dies, resistance welding electrodes, spot welding tips, seam welding wheels, electrode holder jaws, cable connectors, current carrying structural members, electrical switch gears and electrical and thermal conductors requiring greater strength than copper.

 

​C18000 COPPER NICKEL SILICON CHROMIUM - RWMA CLASS 3 is a very hard heat treatable copper with moderate electrical conductivity. This alloy is utilized when a combination of very good mechanical strength along with moderate electrical and thermal conductivity are required. C18000 offers excellent value for the properties it offers. C18000 is a viable substitute for C17500 and C17510 in many applications. high hardness makes them ideal for electrodes for spot and seam welding of high resistance materials such as stainless steels, nichrome, inconel, and monel metal. As a casting, they are used for flash, butt and projection welding electrodes and fixtures. Other uses are welding gun components, seam welding bearing and other current carrying structural parts.

 

C17510 COPPER NICKEL BERYLLIUM - RWMA CLASS 3 has high thermal conductivity combined with good hardness and high-temperature strength. This alloy is being chosen with increasing frequency for applications requiring a combination of high electrical conductivity and mechanical strength, and for applications requiring wear and corrosion resistance. Alloy C17510 Class III beryllium copper is specifically recommended for projection welding dies, flash and butt welding dies, current carrying shafts and bushings. Class III alloy (having higher strength than class II), is recommended for highly stressed welder structural current carrying members and heavy-duty offset electrode holders. Class III alloy is generally recommended for spot welding and seam welding wheels having high electrical resistance, such as stainless steels. C17510 Beryllium Copper conforms to specifications ASTM B441 (ROD), ASTM B534 (PLATE) , RWMA Class III​​