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France AFNOR NF 38C4u Quenched and tempered steels - Part 1: technical delivery conditions for specials steels and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 38C4u / 38 C 4 u
Category Grade Standard Region/Area Standard Content
Metals 38 C 4 u NF A35-552-1 France Quenched and tempered steels - Part 1: technical delivery conditions for specials steels

Chemical composition(mass fraction)(wt.%) of the 38 C 4 u

Element Min Max Similar

Mechanical Properties of steel grade 38 C 4 u

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)
954 (≥) 123 (≥) 14 33 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 312

Physical Properties of steel grade 38 C 4 u

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 -  
781 128 - 33.3 424   -  
484 - 44 21.2   411 442

Heat Treatment of steel grade 38 C 4 u

Heat treated : 1618°C - 1912°C

Technological Curves of steel grade 38 C 4 u

Cross Reference Table (Equivalent Grade) of 38 C 4 u

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