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GX 2 NiCrMo 28 20 2

France AFNOR NF GX2NiCrMo28202 Steel castings for pressure purposes and Mechanical Properties, Chemical Element, Cross Reference.

Category Grade Standard Region/Area Standard Content
Metals GX 2 NiCrMo 28 20 2 NF EN 10213 France Steel castings for pressure purposes

Chemical composition(mass fraction)(wt.%) of the GX 2 NiCrMo 28 20 2

Element Min Max Similar
Si - 1.0000 -
S - 0.0250 -
P - 0.0350 -
Other - - -
Ni 26.0000 30.0000 -
N - 0.2000 -
Mo 2.0000 2.5000 -
Mn - 2.0000 -
Cu - 2.0000 -
Cr 19.0000 22.0000 -
C - 0.0300 -
Si - 1.0000 -
S - 0.0250 -
P - 0.0350 -
Ni 26.0000 30.0000 -
N - 0.2000 -
Mo 2.0000 2.5000 -
Mn - 2.0000 -
Cu - 2.0000 -
Cr 19.0000 22.0000 -
C - 0.0300 -

Mechanical Properties of steel grade GX 2 NiCrMo 28 20 2

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)
219 (≥) 464 (≥) 21 42 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 344

Physical Properties of steel grade GX 2 NiCrMo 28 20 2

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 - -     0.23 -  
781 563 - 12.3 143   -  
555 - 41 31.2   231 212

Heat Treatment of steel grade GX 2 NiCrMo 28 20 2

Heat treated : 1876°C - 1185°C

Technological Curves of steel grade GX 2 NiCrMo 28 20 2

Cross Reference Table (Equivalent Grade) of GX 2 NiCrMo 28 20 2

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