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France AFNOR NF 38MnB5 Steels for quenching and tempering - part 3: technical delivery conditions for alloy steels and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 38MnB5 / 38 MnB 5
Category Grade Standard Region/Area Standard Content
Metals 38 MnB 5 NF EN 10083-3 France Steels for quenching and tempering - part 3: technical delivery conditions for alloy steels

Chemical composition(mass fraction)(wt.%) of the 38 MnB 5

Element Min Max Similar
Si - 0.4000 -
S - 0.0350 -
P - 0.0250 -
Mn 1.1500 1.4500 -
C 0.3600 0.4200 -
B 0.0008 0.0050 -

Mechanical Properties of steel grade 38 MnB 5

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)
544 (≥) 869 (≥) 31 41 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 414

Physical Properties of steel grade 38 MnB 5

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
22 - -     0.21 -  
683 598 - 44.3 231   -  
957 - 31 34.2   333 112

Heat Treatment of steel grade 38 MnB 5

Heat treated : 1542°C - 1738°C

Technological Curves of steel grade 38 MnB 5

Cross Reference Table (Equivalent Grade) of 38 MnB 5

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