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France AFNOR NF 12MF4 Non standardized steels and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 12MF4 / 12 MF 4
Category Grade Standard Region/Area Standard Content
Metals 12 MF 4 -- France Non standardized steels

Chemical composition(mass fraction)(wt.%) of the 12 MF 4

Element Min Max Similar
Si 0.1000 0.4000 -
S 0.1200 0.2400 -
P - 0.0600 -
Mn 0.9000 1.2000 -
C 0.0900 0.1500 -

Mechanical Properties of steel grade 12 MF 4

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)
142 (≥) 519 (≥) 12 11 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 443

Physical Properties of steel grade 12 MF 4

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
12 - -     0.23 -  
815 161 - 32.3 234   -  
712 - 31 24.2   443 332

Heat Treatment of steel grade 12 MF 4

Heat treated : 1632°C - 1157°C

Technological Curves of steel grade 12 MF 4

Cross Reference Table (Equivalent Grade) of 12 MF 4

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