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China GB F-21 钛及钛合金锻件 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: F-21 / F-21
Category Grade Standard Region/Area Standard Content
Metals F-21 GB/T 25137 China 钛及钛合金锻件

Chemical composition(mass fraction)(wt.%) of the F-21

Element Min Max Similar
Total Others - 0.4000 -
Total Each - 0.1000 -
Ti - - -
Si 0.1500 0.2500 -
O - 0.1700 -
Nb 2.2000 3.2000 -
N - 0.0300 -
Mo 14.0000 16.0000 -
H - 0.0150 -
Fe - 0.4000 -
C - 0.0500 -
Al 2.5000 3.5000 -

Mechanical Properties of steel grade F-21

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)
624 (≥) 987 (≥) 24 13 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 133

Physical Properties of steel grade F-21

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
12 - -     0.31 -  
213 337 - 24.3 314   -  
497 - 34 23.2   222 431

Heat Treatment of steel grade F-21

Heat treated : 1948°C - 1671°C

Technological Curves of steel grade F-21

Cross Reference Table (Equivalent Grade) of F-21

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