Class 2 Chrome Copper (RWMA Alloy C18200)
Class 2 material is a general purpose resistance welding electrode material recommended for spot and seam welding of most materials. It is suitable for spot welding electrodes, projection welding electrodes, seam welding wheels, shafts and bearings, flash welding electrodes and current-carrying structural members. It is also available as high strength and high electrical conductivity castings for use as welding plattens and secondary circuit structural members. This material derives its properties from a combination of chemistry, heat treatment and cold work. Class 2 material should be used in the heat treated condtition.
Typical Uses
Consumer
Pencil-type and light soldering guns, tips and rod extensions
Electrical
Switch contacts, electric motor and generator components, contacts, wire, high temperature semi condutor basses, parts for electronic devices, cable connectors, thermal condutors requiring greater strength than plain copper, arcing and bridging parts, circuit breaker parts, electron tube grid side rods.
Industrial
Resistance welding machine electrodes, spot welding tips, seam welding wheels, electrode holders, flash welding electrodes, plastic mold components, current carrying shafts and arms, wear plates on heavy equipment, heat sinks, structural parts.
Chemical Composition
(%max., unless shown as range or min.)
|
|
Cu |
Cr |
Fe |
Pb |
Si |
|
Min.Max. |
Rem. |
.6-1.2 |
.10 |
.05 |
.10 |
|
Nominal |
99.1 |
.9 |
- |
- |
- |
Other designations:
Ampcoloy 97, CMW 3, C-2, CL-2, Electroloy XX, H-2, #130, Tuffaloy 77, Tuff 77, Weldaloy 20, Cr-Cu
