Resistance Welding
Welding Wheels
Class 2 - Chromium Zirconium Copper (18150)
RWMA Class 2 Copper
UNS C18150
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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
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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.
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Suitable for projection welding dies, seam welder shafts and bearings, flash and butt dies and current carrying structural members.
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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
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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.
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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
