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France AFNOR NF 20M5-M Foundry products. Cast steels for low temperatures purposes and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 20M5-M / 20 M5-M
Category Grade Standard Region/Area Standard Content
Metals 20 M5-M NF A32-053 France Foundry products. Cast steels for low temperatures purposes

Chemical composition(mass fraction)(wt.%) of the 20 M5-M

Element Min Max Similar
Si - 0.5000 -
S - 0.0300 -
P - 0.0300 -
Mn - 1.2000 -
Fe - - -
C - 0.2200 -

Mechanical Properties of steel grade 20 M5-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)
198 (≥) 185 (≥) 33 31 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 411

Physical Properties of steel grade 20 M5-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
14 - -     0.23 -  
274 321 - 41.3 424   -  
581 - 21 14.2   113 224

Heat Treatment of steel grade 20 M5-M

Heat treated : 1721°C - 1246°C

Technological Curves of steel grade 20 M5-M

Cross Reference Table (Equivalent Grade) of 20 M5-M

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