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France AFNOR NF M20-M Casting products. Magnetic cast steel grades and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: M20-M / M 20-M
Category Grade Standard Region/Area Standard Content
Metals M 20-M NF A32-052 France Casting products. Magnetic cast steel grades

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

Element Min Max Similar
S - 0.0400 -
P - 0.0400 -

Mechanical Properties of steel grade M 20-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)
844 (≥) 118 (≥) 22 22 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 444

Physical Properties of steel grade M 20-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
41 - -     0.41 -  
772 572 - 31.3 141   -  
576 - 43 13.2   434 224

Heat Treatment of steel grade M 20-M

Heat treated : 1279°C - 1247°C

Technological Curves of steel grade M 20-M

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

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