Tungsten Copper for Electrical Application

Tungsten Copper for Electrical Application

Tungsten copper electrical contacts are subjected to extreme mechanical and thermal stresses during operation. For fractions of a second, temperatures rise to several thousand degrees as a result of the arcing. Our tungsten-Copper materials are used owing to their unique physical properties.

Advantages: without other element except Tungsten and Copper, uniform material, low content of gas and impurity, very high burn-off resistance, excellent thermal and electrical conductivity, all necessary joining and machining processes.
Typical properties electrical of W-Cu

Type Density(g/cm3) HB(MPa) Electrical
Conductivity
(% IACS) Form
WCu10 16.8-17.2 ≥2550 > 27 Rods, Bars
Sheets,Plates,
Parts
WCu20 15.2-15.6 ≥2160 > 34
WCu25 14.5-15.0 ≥1940 > 38
WCu30 13.8-14.4 ≥1720 > 42
　
Grade RWMA GroupB
Nominal
composition
% Weight Rockwell Hardness Electrical Conductvity
% ACS Ultimate Tensile Strength Mpa
WT55 --- 45 copper 79B 55 435
55 tungsten
WT70 class10 30 copper 90B 50 586
70 tungsten
WT75 class11 25 Copper 94B 48 621
75 Tungsten
WT80 Class12 20 Copper 98B 44 662
80 Tungsten
WT85 -- 15 copper 102B 36 518
85 tungsten
WT90 -- 10 copper 106B 28 482
90 Tungsten
TC50 -- 50 copper 94B 47 483
50 Tungsten-Carbide
TC70 -- 30 copper 37C 30 587
　
Cross Breaking
Strength Density GMS/CC

Thermal
Exp in/in
cx10(6)at 20°
Thermal
Conductivity W/CM
20-400°C Specific
Heat/kg°C
at 20° Electro
resistance
at20°
759 12.6 11.8 2.4 251 3.16
966 14.18 10.77 2.01 214 3.41
1035 14.7 10.22 1.89 201 3.51
1173 15.58 9.2 1.82 188 3.9
1173 16.19 7.97 1.75 175 4.71
1035 17.05 6.49 1.47 163 6.1
966 11.27 12.2 -- -- 3.6
1241 12.6 9.8 -- -- 5.7