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AS3678 Grade 250

China 舞钢Q/WTB AS3678Grade250 合同号“99CK-A-19”技术要求及工艺要点 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: AS3678Grade250 / AS3678 Grade 250
Category Grade Standard Region/Area Standard Content
Metals AS3678 Grade 250 WJX 033 China 合同号“99CK-A-19”技术要求及工艺要点

Chemical composition(mass fraction)(wt.%) of the AS3678 Grade 250

Element Min Max Similar
Cu+Ni+Cr+Mo - 1.0000 -
CE - 0.4500 -
Mo - 0.1000 -
Cr - 0.3000 -
Ni - 0.5500 -
Cu - 0.4000 -
Ti - 0.0400 -
Al - 0.1000 -
S - 0.0400 -
P - 0.0400 -
Mn - 1.7000 -
Si - 0.5500 -
C - 0.2200 -

Mechanical Properties of steel grade AS3678 Grade 250

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)
437 (≥) 123 (≥) 12 31 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 342

Physical Properties of steel grade AS3678 Grade 250

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
42 - -     0.23 -  
211 342 - 31.3 124   -  
551 - 41 43.2   141 111

Heat Treatment of steel grade AS3678 Grade 250

Heat treated : 1362°C - 1559°C

Technological Curves of steel grade AS3678 Grade 250

Cross Reference Table (Equivalent Grade) of AS3678 Grade 250

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