Applications:
Resistance Welding: Class 2 copper alloys are widely used in resistance welding for electrodes, tips, wheels, holders, and dies.
Welding Coated Steels: They are particularly well-suited for welding coated materials like galvanized steel.
Other Uses: Class 2 copper alloys also find applications in current-carrying shafts and arms, heat sinks, and structural parts.
Properties:
Class 2 copper alloys offer a good combination of strength and conductivity, along with resistance to sticking when welding coated materials. They are stronger than Class 1 alloys but with slightly lower conductivity, according to Anchor Bronze & Metals, Inc..
Copper Chromium Zirconium (C18150):
Another Class 2 alloy, Copper Chromium Zirconium, adds zirconium to chromium copper to enhance creep resistance at high temperatures and reduce electrode sticking.
Scrap Copper #2:
It's important to note that "Class 2" also refers to a grade of scrap copper, which is different from the RWMA Class 2 material. Scrap copper #2 is a slightly lower grade than #1, containing impurities like solder or paint, but is still valuable for recycling.
