Class | Nominal tungsten (weight percent) | Density (g/cc) | Hardness ( HRC )(maximum) |
1 | 90 | 16.85 - 17.25 | 32 |
2 | 92.5 | 17.15- 17.85 | 33 |
3 | 95 | 17.75- 18.35 | 34 |
4 | 97 | 18.25- 18.85 | 35 |
WCu tungsten copper alloy Chemical composition
Material | WCu% Tungsten Content | Hardness HB | g/ Density at 20ºC | W/M.K Thermal conductivity at 25ºC | (10-6/k) Coefficient of thermal expansion at 20ºC |
W90Cu10 | 90 | 260 | 17.0 | 180-190 | 6.5 |
W85Cu15 | 85 | 240 | 16.4 | 190-200 | 7.0 |
W80Cu20 | 80 | 220 | 15.6 | 200-210 | 8.3 |
W75Cu25 | 75 | 195 | 14.9 | 220-230 | 9.0 |
W50Cu50 | 50 | 125 | 12.2 | 310-340 | 12.5 |
Tungsten Alloys | ||||
EFI Grade | EF17 | EF175 | EF18 | EF185 |
ASTM B 777-07 | 1 | 2 | 3 | 4 |
Weight % Tungsten | 90 | 92.5 | 95 | 97 |
Nominal Density GM/CC | 17.00 | 17.50 | 18.00 | 18.50 |
Minimum* Ultimate Tensile Strength UTS (KSI) | 110 | 110 | 105 | 100 |
Minimum* Elongation % | 5 | 5 | 3 | 2 |
Modulus of Elasticity (KSI) | 45,000 | 48,000 | 50,000 | 52,000 |