Luvata offers weld wheels that are designed specifically with your application in mind.
Welding wheel alloys include Class I, Class II and Class III. Common weld wheels are in sizes up to 20".
- Kova® copper, nickel, silicon and chromium (CuNiSiCr)
- Copper Zirconium (CuZr)
- Copper Chrome Zirconium (CuCrZr)
- Copper Nickel Silicon (CuNiSi)
Kova® - the 'beryllium-free' alloy made of copper, nickel, silicon and chromium (CuNiSiCr).
Kova is a high-strength, beryllium-free precipitation hardening alloy with medium-high electrical and thermal conductivity.
Kova is the perfect replacement for harmful beryllium copper alloys.
- Easy to machine and form
- Extended use due to hardness
- High strength with moderate thermal and electrical conductivity
- Easy disposal
- Projection welding electrodes
- Weld wheels
Kova® NK203 is a RWMA Class III alloy
Ni 1.8 - 3.0%; Si 0.4 - 0.8%; Cr 0.1 - 0.8%; Fe 0.15% max;. Cu balance
|Physical, electrical and thermal properties|
Density: 8.8 kg/dm3
Coefficient of linear expansion: 0.0000175 1/K
Specific heat: 380 J/(kg x K)
Acceptance test certificate EN-CEN/TS 13388:2008
Errors and omissions excepted. Values given are industry standards.
|Form of supply||Tensile strength [N/mm2]||0.2% Offset yield strength [N/mm2]||Elongation AS [%]||Hardness HV|