The electrodes of nut spot welding machines can be divided into three categories, one is: good conductivity but poor strength; One type is suitable for most workpieces with moderate conductivity and strength; The other type has poor conductivity but good strength (mainly high temperature strength). Below, the editor will introduce them to everyone.

Top class: Good conductivity but poor strength, such as copper and copper alloys, such as E-Cu (Cu Cd, Cu Ag alloys).

Suitable for welding components that require high current density but poor high-temperature strength, such as welding aluminum and aluminum alloys, and can also be used for welding coated steel plates. It is also commonly used to manufacture conductive components that are not subjected to stress or low stress.

The second type: moderate conductivity and strength. Suitable for most parts, this type of copper alloy is used in the automotive industry, such as Cr Cu (chromium bronze), Cr Zr Cu (chromium zirconium copper), Co Be Cu (beryllium cobalt copper), etc.

It is a universal electrode material used for spot welding low-carbon steel, low-alloy steel, stainless steel, high-temperature alloys, copper alloys with low conductivity, and coated steel. It is also suitable for manufacturing various conductive components in resistance welding machines such as shafts, clamps, platens, electrode clamps, and machine arms.

The third category: poor conductivity but good strength (mainly high temperature strength), with higher mechanical properties and good wear resistance, such as chromium zinc bronze, M4 alloy, Mo, WCu, W.

Suitable for welding high strength and hardness stainless steel, high-temperature alloys, etc.