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Copper Tungsten Alloys

Applications for Copper Tungsten

  • RESISTANCE WELDING
  • HEAT SINKS
  • ELECTRICAL DISCHARGE MACHINING
  • ELECTRO-CHEMICAL MACHINING
  • ELECTRICAL CONTACTS

Copper Tungsten Class 10 (1W3, 5W3)

Class 10 material is recommended as facings or inserts for projection welding electrodes and flash and butt welding dies where high electrical conductivity is desirable and a degree of malleability is necessary.

Copper Tungsten Class 11 (10W3)

Class 11 (a harder material than Class 10) is recommended as facing inserts for flash and butt welding dies and general purpose projection welding electrodes. It may also be used as seam welder bearing inserts and facing for electro-forming or electro-forging, such as stainless steel.

Copper Tungsten Class 12 (30W3)

Class 12 material is specifically recommended for heavy duty projection welding electrodes and for die facings in electro-forming and electro-forging applications. It is suitable as die material for electrical upsetting of rivets and studs.

RWMA Class/(Temper) Alloy Number Hardness Conductivity(%) Tensile Strength
Class 10
(1W3)
55W; 45CU B77 53 110 ksi
Class 10
(5W3)
70W; 30CU B95 48 140 ksi
Class 11
(10W3)
75W; 25CU B98 45 150 ksi
Class 12
(30W3)
80W; 20CU B103 41 170 ksi

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