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Description

Australia AS X9931 Australia Structural steel and X9931 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Structure Steel: X9931
Category Type Steel Grade Standard Country Application
Steel GradesStructure Steel X9931 AS Australia Australia Structural steel
8740H
9260H
926LH
X9315H
X4036
4130
4140
4340
X7039
X7232

Chemical composition(mass fraction)(wt.%) of the X9931

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%) Mo(%)
0.27-0.35 0.10-0.35 0*45-0.70 0.040 0.04 0.50-0.80 2.30-2.80 0.45-0.65

Mechanical Properties of steel grade X9931

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)
815 (≥) 644 (≥) 12 43 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 131

Physical Properties of steel grade X9931

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
44 - -     0.23 -  
415 241 - 12.3 311   -  
379 - 14 21.2   442 414

Heat Treatment of steel grade X9931

Heat treated : 1315°C - 1515°C

Technological Curves of steel grade X9931

Cross Reference Table (Equivalent Grade) of X9931

Grade Standard Country Application
X9931 AS Australia Australia Structural steel
X9931 AS Australia Australia Structural steel

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