Elkonit Copper Tungsten

Elkonite is the registered trade mark of CMW used to identify a group of metal compositions whose elements consist basically of the refractory metals tungsten, molybdenum and tungsten carbide combined with copper. Combinations of these elements produce dense, hard metals of superior wear resistance and strength at elevated temperatures, coupled with good thermal and electrical conductivity. The mechanical and physical properties of the CMW Elkonite materials make them particularly suitable as the die inserts and facings for volume projection welding, flash and butt welding, electrical upsetting and electroforming applications.

Elkonite copper tungsten is also used successfully as facing on spot welding electrodes where heat balance or mechanical wear resistance are required. The initial premium cost of Elkonite copper tungsten is offset by lower production cost per weld due to long die life and less electrode dressing time. The high stability of Elkonite copper tungsten insures uniform heating and prevents misalignment, resulting in a higher quality weld.

Elkonite Copper Tungsten Main Properties

Elkonit copper tungsten picture
Group

Grade

Composition(%wt)

Class #

hardness

conductivity

Elkonite10055

1W3

55W,45Cu

10

70HRB

49%IACS

Elkonite10068

3W3

68W,32Cu

 

83HRB

42%IACS

Elkonite10070

5W3

70W,30Cu

11

88HRB

42%IACS

Elkonite10075

10W3

75W,25Cu

 

92HRB

38%IACS

Elkonite10080

30W3

80W,20Cu

12

98HRB

34%IACS

Elkonite10250

TC5

50WC,50Cu

 

94HRB

45%IACS

Elkonite10256

TC10

56WC,44Cu

 

100HRB

42%IACS

Elkonite10270

TC20

70WC,30Cu

 

37HRC

30%IACS

Elkonite Copper Tungsten Generally Uses

1W3, 3W3 generally used for flash welding with the butt of the mosaic blocks. Forge ability of these applications requires a high conductivity and a metal. These materials also can be used for spot welding (as a spherical electrode) ferrous metal of low conductivity, such as stainless steel welding.
The 5W3 and TC5 general used for light projection welding and pressure welding plus.
10W3 applies to most of the flash welding electrodes mosaic blocks, projection welding butt welding tongs. For light electric upsetting electric forging dies, and seam welding liner insert.
TC10. Recommended for use in the impression of mass production projection welding, the welding pressure is set relatively high. Non-ferrous metal processing, electric and low-carbon steel forging crude commonly used this material as the stamp face cross welded large diameter line and bars in this material.
TC20 is very hard and the easy corrosion (electrolytic corrosion) TC20 difficult to process, and may be considered the top of the carbon tool. Processing is unrealistic.
This material used as the electric upsetting electric forging in very specific applications.

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