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G 20 Mn 5

France AFNOR NF G20Mn5 Steel castings for pressure purposes and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: G20Mn5 / G 20 Mn 5
Category Grade Standard Region/Area Standard Content
Metals G 20 Mn 5 NF EN 10213 France Steel castings for pressure purposes

Chemical composition(mass fraction)(wt.%) of the G 20 Mn 5

Element Min Max Similar
V - 0.0300 -
Si - 0.6000 -
S - 0.0200 -
P - 0.0200 -
Ni - 0.8000 -
Mo - 0.1200 -
Mn 1.0000 1.6000 -
Cu - 0.3000 -
Cr+Mo+Ni+V+Cu - 1.0000 -
Cr - 0.3000 -
C 0.1700 0.2300 -
V - 0.0500 -
Si - 0.6000 -
S - 0.0200 -
P - 0.0200 -
Ni - 0.8000 -
Mo - 0.1500 -
Mn 1.0000 1.6000 -
Cu - 0.3000 -
Cr - 0.3000 -
C 0.1700 0.2300 -
V - 0.0300 -
Si - 0.6000 -
S - 0.0200 -
P - 0.0200 -
Ni - 0.8000 -
Mo - 0.1200 -
Mn 1.0000 1.6000 -
Cu - 0.3000 -
Cr - 0.3000 -
C 0.1700 0.2300 -

Mechanical Properties of steel grade G 20 Mn 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)
227 (≥) 947 (≥) 44 31 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 322

Physical Properties of steel grade G 20 Mn 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
22 - -     0.22 -  
782 215 - 41.3 131   -  
598 - 43 43.2   424 232

Heat Treatment of steel grade G 20 Mn 5

Heat treated : 1763°C - 1843°C

Technological Curves of steel grade G 20 Mn 5

Cross Reference Table (Equivalent Grade) of G 20 Mn 5

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