Resistance Welding
Welding Wheels
Class 2 - Chromium Zirconium Copper (18150)
RWMA Class 2 Copper
UNS C18150
Class 2 copper (18150) Copper Chromium Zirconium is used extensively for cap style resistance welding electrodes. Evidence suggests that it can provide less sticking and resist deformation longer than its copper-chrome counterpart in some specific situations.
C18150
Class 2 - Chromium Copper (18200)
RWMA Class 2 Copper
UNS C18200
Class 2 Alloy is a superior resistance welding electrode material specifically recommended for high level production spot and seam welding of clean mild steel, low ally steel, low conductivity brasses and bronzes.
Suitable for projection welding dies, seam welder shafts and bearings, flash and butt dies and current carrying structural members.
Available as high strength and high electrical conductivity casting for such use as gun welder arms, welder platen and secondary structural members. Class 2 is also heat treatable.
C18200
Class 3 - Beryllium Free Copper (18000)
RWMA Class 3 Beryllium Free
C18000
C18000 is utilized when a combination of very good mechanical strength along with
moderate electrical and thermal electrical conductivity are required. C18000 is a viable
substitute for C17500 and C17510 for many applications. C18000 is a heat treatable copper
alloy.
C18000
Class 3 - Beryllium Copper (17510)
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ASTM B441
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ASTM B534
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MIL C-81021
Class 3 Alloy is specifically recommended for projection welding dies, flash and butt welding dies, current carrying shafts and bushings. As castings, Class 3 Alloy (having higher strength than Class 2), is recommended for highly stressed welder structural current carrying members and heavy duty offset electrode holders.
Class 3 Alloy is generally recommended for spot welding and seam welding steels having high electrical resistance, such as stainless steels. The Class 3 Alloy is heat treatable.
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SAE J461
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SAE J463
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UNS C17510
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SAE J463
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UNS C17510
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Class 3 Copper
C17510
