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A731 Grade Type XM-8

America ASTM A731GradeTypeXM-8 无缝及焊接铁素体和马氏体不锈钢公称管 and Mechanical Properties, Chemical Element, Cross Reference.

Category Grade Standard Region/Area Standard Content
Metals A731 Grade Type XM-8 ASTM A731/A731M America 无缝及焊接铁素体和马氏体不锈钢公称管

Chemical composition(mass fraction)(wt.%) of the A731 Grade Type XM-8

Element Min Max Similar
Ti - - -
Si - 1.0000 -
S - 0.0300 -
P - 0.0400 -
Ni+Cu - 0.5000 -
Ni - 0.5000 -
N - 0.0400 -
Mn - 1.0000 -
Cr 17.0000 19.0000 -
C - 0.0700 -
Al - 0.1500 -

Mechanical Properties of steel grade A731 Grade Type XM-8

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)
814 (≥) 883 (≥) 23 42 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 313

Physical Properties of steel grade A731 Grade Type XM-8

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
32 - -     0.31 -  
192 799 - 31.3 111   -  
996 - 44 43.2   414 224

Heat Treatment of steel grade A731 Grade Type XM-8

Heat treated : 1881°C - 1254°C

Technological Curves of steel grade A731 Grade Type XM-8

Cross Reference Table (Equivalent Grade) of A731 Grade Type XM-8

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