Вольфрамовые стержни

 Molybdenum

 Tungsten

 Density

 G/CM³

 10.22

 19.3

 Melting point

 ^oC

 2620

 3410

 Thermal conductivity

 W/M.K

 98.8   (1400 ^oC )

 174   (10--100 ^oC )

 Resistivity

  Ω.CM

 53.1  (1730 ^oC )

 35   (1000 ^oC )

 Vapor pressure

 Pa

 7.09 X 10^-6   (1600 ^oC )

 low

 Modulus

 /MPa

 343 350

 35 316

 Thermal expansion coefficient

 K^-1

 6.2 X 10^-6    (700 ^oC )

 4.5 X 10^-6   (0--100 ^oC )

 Hardness

 HB

 35--125

 290--350

 Tensile strength

 MPa

 687

 981-1472

Brand

Chemical composion W/(%)

Main composion

Main composion Impurity composion ≤

C

W

Ti

Zr

Fe

Al

Si

Ni

Ca+Mg

W

O2

N2

C

Mo1

-

-

-

-

0.01

0.002

0.006

0.005

0.007

0.3

0.01

0.003

0.01

Chemical composion W/(%)

Brand

W

Impurity ≤

Al

Ca

 Fe

Mg

Mo

Ni

Si

C

N

O

W1

Balance

0

0.005

0.005

0.003

0.01

0.003

0.005

0.008

0

0.005