DATA SHEET

Material:

Elkanite 20W3

Applications:

The primary use of Elkanite 20W3 is as facings and inserts for projection, cross wire and flash butt welding electrodes and dies.

 It can be used as a die for low pressure hot upsetting and hot rivetting and is also a main spark erosion electrode material. Other applications include backings for M.I.G. welding operations and as a heat sink where good thermal co-efficiency of expansion properties are called for. 

Forms of Supply

Produced by the infiltration of copper into a tungsten matrix Elkanite 20W3 is available in stock lengths of 8".  Larger bars can be made upon request.  Diameter sizes range from 1/ 8" upwards and a large range of square and rectangle sizes are available from stock.  Discs, rings and plates can also be produced to order.

Nominal Composition:

75% tungsten 25% copper.

Hardness:

97 - 103 Rockwell 'B'

(approx. 221 - 260 HV)

(approx. 224 - 260 HB30)

U.T.S:

645MN/m²

Electrical Conductivity:

27 - 44% I.A.C.S.

(15.66 - 25.52 M / ohm mm²)

Specific Resistivity:

6.385 - 3.918 microhm cm

Thermal Conductivity:

139 W / mK typical

Coefficient of Linear Expansion

(20-900 degs C):  

9.82 x 10^­6 in/in/deg C

Softening Temperature

Approx. 1000 deg C