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China GJB 25Cr3MoA 航空用高纯洁度合金结构钢棒规范 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 25Cr3MoA / 25Cr3MoA
Category Grade Standard Region/Area Standard Content
Metals 25Cr3MoA GJB 6487 China 航空用高纯洁度合金结构钢棒规范

Chemical composition(mass fraction)(wt.%) of the 25Cr3MoA

Element Min Max Similar
Sn - 0.0300 -
Cu - 0.2000 -
Mo 0.5000 0.7000 -
Ni - 0.3000 -
Cr 3.0000 3.5000 -
S - 0.0150 -
P - 0.0200 -
Mn 0.4000 0.7000 -
Si 0.1000 0.3500 -
C 0.2000 0.2800 -

Mechanical Properties of steel grade 25Cr3MoA

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)
816 (≥) 159 (≥) 41 34 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 142

Physical Properties of steel grade 25Cr3MoA

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
23 - -     0.22 -  
697 772 - 31.3 241   -  
459 - 34 23.2   122 332

Heat Treatment of steel grade 25Cr3MoA

Heat treated : 1194°C - 1336°C

Technological Curves of steel grade 25Cr3MoA

Cross Reference Table (Equivalent Grade) of 25Cr3MoA

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