Main Comp.W≥95.0%

Other Content≤

Fe

0.0026

Al

0.0006

Si

0.001

Ca

0.001

Ni

0.0009

O

0.0018

Cu

0.0005

N

0.0015

Pb

0.0001

Sn

0.0001

Sb

0.001

As

0.001

Cd

0.0001

Mg

0.0006

C

0.002

Bi

0.0001

Mo

0.003

-

-

Tungsten Property

Melting point:

3420  ^oC±20  ^oC

Boiling point:

5550 ^oC

Coefficient of linear thermal expansion at 20 °C

4.2 · 10^-6 [m/(m·K)]

Thermal conductivity at 20 °C

 164 [W/(m·K)]

Specific heat at 20 °C

0.13 [J/(g·K)]

Electrical conductivity at 20 °C

18 · 10⁶ [1/Ω·m)]

Specific electrical resistance at 20 °C

: 0.050 [(Ω·mm²)/m]