Resistance Welding Alloys

CMW sells many of the same quality high conductivity tungsten copper alloys that it uses to make resistance welding accessories. Generally these materials are designed for a combination of specific electrical properties, and retention of strength at elevated temperatures.

COPPER BASE ALLOYS (GROUP A RWMA MATERIALS)

Long electrode life is of paramount importance to the user of resistance welding equipment. Selection of the proper CMW alloy or combination of alloys will help to give improved weld strength and electrode life.

CMW electrodes are fabricated from alloys selected from the results of laboratory and practical field tests. For special problems, CMW engineers will make recommendations based on their years of experience.

Click on the links below to learn more about our materials.

 RWMA Classification   Number
Class1 Copper, Zirconium 1.15000
Class 2 Copper, Chromium  2.18200
Class 2  Copper, Chromium, Zirconium  2.18150
Class 3  Copper, Nickel, Silicon, Chromium  3.18000
Class 3  Copper, Nickel (Beryllium Free)  3.17510
Class 3  Copper, Beryllium  4.17200

 

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RWMA Class 1 (Copper, Zirconium)
Class 1 material is recommended for spot welding of coated steels and high conductivity materials, excluding copper and silver.

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RWMA Class 2 (Copper, Chromium)
Class 2 material is recommended for spot and seam welding cold and hot-rolled steels and coated materials as well as current carrying shafts and arms, back-up bars for both resistance and arc welding and electrical current carrying structural parts and springs.

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RWMA Class 2 (Copper, Chromium, Zirconium)
Class 2 material is recommended for spot and seam welding cold and hot rolled steels. There is some evidence that this alloy outperforms other alloys material when welding coated or galvanized steels.

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RWMA Class 3 (Copper, Nickel, Berylium Free)
Class 3 material is recommended for heavy duty offset holders, back-up bars, flash welding dies, current carrying structural members, shafts and bushings in combination with Class 2 Alloys.

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