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G 18 Mo 5

France AFNOR NF G18Mo5 Steel castings for pressure purposes and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: G18Mo5 / G 18 Mo 5
Category Grade Standard Region/Area Standard Content
Metals G 18 Mo 5 NF EN 10213 France Steel castings for pressure purposes

Chemical composition(mass fraction)(wt.%) of the G 18 Mo 5

Element Min Max Similar
Si - 0.6000 -
S - 0.0200 -
P - 0.0200 -
Mo 0.4500 0.6500 -
Mn 0.8000 1.2000 -
C 0.1500 0.2000 -
V - 0.0500 -
Si - 0.6000 -
S - 0.0200 -
P - 0.0200 -
Ni - 0.4000 -
Mo 0.4500 0.6500 -
Mn 0.8000 1.2000 -
Cu - 0.3000 -
Cr - 0.3000 -
C 0.1500 0.2000 -

Mechanical Properties of steel grade G 18 Mo 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)
261 (≥) 483 (≥) 43 33 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 141

Physical Properties of steel grade G 18 Mo 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
42 - -     0.11 -  
668 583 - 43.3 332   -  
375 - 21 21.2   314 322

Heat Treatment of steel grade G 18 Mo 5

Heat treated : 1447°C - 1744°C

Technological Curves of steel grade G 18 Mo 5

Cross Reference Table (Equivalent Grade) of G 18 Mo 5

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