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GS-12 MnMo 7 4

Germany SEW GS-12MnMo74 High strength steel castings with good weldability. Technical delivery conditions and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: GS-12MnMo74 / GS-12 MnMo 7 4
Category Grade Standard Region/Area Standard Content
Metals GS-12 MnMo 7 4 SEW 520 Germany High strength steel castings with good weldability. Technical delivery conditions

Chemical composition(mass fraction)(wt.%) of the GS-12 MnMo 7 4

Element Min Max Similar
V - 0.1000 -
Si - 0.6000 -
S - 0.0150 -
P - 0.0200 -
Nb - 0.0500 -
N - 0.0200 -
Mo 0.3000 0.4000 -
Mn 1.5000 1.8000 -
Cr - 0.2000 -
C 0.0800 0.1500 -

Mechanical Properties of steel grade GS-12 MnMo 7 4

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)
392 (≥) 687 (≥) 11 11 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 123

Physical Properties of steel grade GS-12 MnMo 7 4

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
33 - -     0.22 -  
436 525 - 32.3 321   -  
747 - 11 33.2   142 433

Heat Treatment of steel grade GS-12 MnMo 7 4

Heat treated : 1229°C - 1427°C

Technological Curves of steel grade GS-12 MnMo 7 4

Cross Reference Table (Equivalent Grade) of GS-12 MnMo 7 4

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