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China GJB 25A 航空用钢锻件规范 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 25A / 25A
Category Grade Standard Region/Area Standard Content
Metals 25A GJB 5040 China 航空用钢锻件规范

Chemical composition(mass fraction)(wt.%) of the 25A

Element Min Max Similar
C 0.2200 0.3000 -
Mn 0.5000 0.8000 -
Si 0.1700 0.3700 -
Cr - 0.3000 -
Ni - 0.3000 -
S - 0.0300 -
P - 0.0300 -
Cu - 0.2500 -
W - 0.2000 -
Mo - 0.1500 -
V - 0.0500 -
Ti - 0.0300 -
C 0.2200 0.3000 -
Mn 0.5000 0.8000 -
Si 0.1700 0.3700 -
Cr - 0.3000 -
Ni - 0.3000 -
S - 0.0300 -
P - 0.0300 -
Cu - 0.2500 -
W - 0.2000 -
Mo - 0.1500 -
V - 0.0500 -
Ti - 0.0300 -

Mechanical Properties of steel grade 25A

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)
542 (≥) 315 (≥) 42 34 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 134

Physical Properties of steel grade 25A

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
13 - -     0.34 -  
469 812 - 11.3 114   -  
383 - 44 33.2   323 441

Heat Treatment of steel grade 25A

Heat treated : 1191°C - 1782°C

Technological Curves of steel grade 25A

Cross Reference Table (Equivalent Grade) of 25A

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