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31 CrMo 12 5

Favorite Datasheet

Germany SEW 31CrMo125 Steels for larger forgings for components in turbine and generator installations and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 31CrMo125 / 31 CrMo 12 5
Category Grade Standard Region/Area Standard Content
Metals 31 CrMo 12 5 SEW 555 Germany Steels for larger forgings for components in turbine and generator installations

Chemical composition(mass fraction)(wt.%) of the 31 CrMo 12 5

Element Min Max Similar
Si - 0.3000 -
S - 0.0200 -
P - 0.0200 -
Mo 0.3000 0.7000 -
Mn 0.4000 0.7000 -
Cr 2.8000 3.3000 -
C 0.2800 0.3500 -

Mechanical Properties of steel grade 31 CrMo 12 5

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)
475 (≥) 792 (≥) 22 13 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 224

Physical Properties of steel grade 31 CrMo 12 5

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
24 - -     0.34 -  
595 418 - 33.3 424   -  
755 - 24 33.2   313 233

Heat Treatment of steel grade 31 CrMo 12 5

Heat treated : 1743°C - 1665°C

Technological Curves of steel grade 31 CrMo 12 5

Cross Reference Table (Equivalent Grade) of 31 CrMo 12 5

Grade Standard Country Application
ASTM 5140
AISI 201
AISI 202
1.2767
17-4PH
AISI 1052
AISI 416Se
AISI 1330
AISI 205 Stainless Steel
AISI A10
AISI A2
AISI A3
AISI A4
1.0036
1.0037
SAE J403
UNS G10100
AMS 4924
ASTM A36
Electrode 100S-1
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