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G 20 NiMoCr 3 7

Germany SEW G20NiMoCr37 Steel casting for use at low temperature. Technical delivery conditions and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: G20NiMoCr37 / G 20 NiMoCr 3 7
Category Grade Standard Region/Area Standard Content
Metals G 20 NiMoCr 3 7 SEW 685 Germany Steel casting for use at low temperature. Technical delivery conditions

Chemical composition(mass fraction)(wt.%) of the G 20 NiMoCr 3 7

Element Min Max Similar
Si 0.3000 0.5000 -
S - 0.0150 -
P - 0.0150 -
Ni 0.6000 1.1000 -
Mo 0.4000 0.8000 -
Mn 0.7000 1.1000 -
Cr 0.3000 0.5000 -
C 0.1700 0.2300 -

Mechanical Properties of steel grade G 20 NiMoCr 3 7

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)
182 (≥) 117 (≥) 22 33 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 134

Physical Properties of steel grade G 20 NiMoCr 3 7

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
22 - -     0.13 -  
165 918 - 43.3 113   -  
571 - 24 21.2   341 331

Heat Treatment of steel grade G 20 NiMoCr 3 7

Heat treated : 1958°C - 1715°C

Technological Curves of steel grade G 20 NiMoCr 3 7

Cross Reference Table (Equivalent Grade) of G 20 NiMoCr 3 7

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