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China GB TW4 钨条 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: TW4 / TW4
Category Grade Standard Region/Area Standard Content
Metals TW4 GB/T 3459 China 钨条

Chemical composition(mass fraction)(wt.%) of the TW4

Element Min Max Similar
W - - -
N - 0.0050 -
O - 0.0070 -
C - 0.0100 -
P - 0.0030 -
Mo - 0.0500 -
Mg - 0.0050 -
Ca - 0.0050 -
Si - 0.0050 -
Al - 0.0050 -
Ni - 0.0500 -
Fe - 0.0300 -
As - 0.0020 -
Sb - 0.0010 -
Sn - 0.0005 -
Bi - 0.0005 -
Pb - 0.0005 -

Mechanical Properties of steel grade TW4

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
876 (≥) 937 (≥) 32 44 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 144

Physical Properties of steel grade TW4

Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
43 - -     0.41 -  
183 941 - 42.3 444   -  
389 - 22 13.2   421 423

Heat Treatment of steel grade TW4

Heat treated : 1754°C - 1635°C

Technological Curves of steel grade TW4

Cross Reference Table (Equivalent Grade) of TW4

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