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China YS FTa-4 冶金用钽粉 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: FTa-4 / FTa-4
Category Grade Standard Region/Area Standard Content
Metals FTa-4 YS/T 259 China 冶金用钽粉

Chemical composition(mass fraction)(wt.%) of the FTa-4

Element Min Max Similar
Mg - 0.0100 -
Cu - 0.0010 -
Al - 0.0010 -
Ca - 0.0010 -
Sn - 0.0010 -
Mn - 0.0010 -
Ti - 0.0100 -
Mo - 0.0100 -
W - 0.0100 -
Nb - 0.0300 -
Si - 0.0300 -
Cr - 0.0200 -
Ni - 0.0200 -
Fe - 0.0200 -
N - 0.0450 -
C - 0.0200 -
O - 0.3000 -
H - 0.0100 -
Ta 99.5000 - -

Mechanical Properties of steel grade FTa-4

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)
663 (≥) 629 (≥) 43 23 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 431

Physical Properties of steel grade FTa-4

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
34 - -     0.23 -  
264 226 - 14.3 221   -  
712 - 41 22.2   413 231

Heat Treatment of steel grade FTa-4

Heat treated : 1372°C - 1557°C

Technological Curves of steel grade FTa-4

Cross Reference Table (Equivalent Grade) of FTa-4

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