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20 NCD4-M

France AFNOR NF 20NCD4-M Foundry products. Cast steels for low temperatures purposes and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 20NCD4-M / 20 NCD4-M
Category Grade Standard Region/Area Standard Content
Metals 20 NCD4-M NF A32-053 France Foundry products. Cast steels for low temperatures purposes

Chemical composition(mass fraction)(wt.%) of the 20 NCD4-M

Element Min Max Similar
Si - 0.6000 -
S - 0.0200 -
P - 0.0250 -
Ni 0.8000 1.2000 -
Mo 0.4000 0.8000 -
Mn 0.8000 1.2000 -
Fe - - -
Cr 0.3000 0.5000 -
C 0.1700 0.2300 -

Mechanical Properties of steel grade 20 NCD4-M

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)
137 (≥) 949 (≥) 42 44 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 344

Physical Properties of steel grade 20 NCD4-M

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
13 - -     0.44 -  
745 246 - 44.3 414   -  
518 - 12 44.2   424 343

Heat Treatment of steel grade 20 NCD4-M

Heat treated : 1766°C - 1377°C

Technological Curves of steel grade 20 NCD4-M

Cross Reference Table (Equivalent Grade) of 20 NCD4-M

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