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40 NiCrMo 8-4

Germany DIN 40NiCrMo8-4 Heat treatable low alloyed NiCrMnMo steel and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 40NiCrMo8-4 / 40 NiCrMo 8-4
Category Grade Standard Region/Area Standard Content
Metals 40 NiCrMo 8-4 -- Germany Heat treatable low alloyed NiCrMnMo steel

Chemical composition(mass fraction)(wt.%) of the 40 NiCrMo 8-4

Element Min Max Similar

Mechanical Properties of steel grade 40 NiCrMo 8-4

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)
714 (≥) 345 (≥) 23 24 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 241

Physical Properties of steel grade 40 NiCrMo 8-4

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
14 - -     0.21 -  
669 868 - 33.3 224   -  
791 - 34 12.2   123 142

Heat Treatment of steel grade 40 NiCrMo 8-4

Heat treated : 1227°C - 1576°C

Technological Curves of steel grade 40 NiCrMo 8-4

Cross Reference Table (Equivalent Grade) of 40 NiCrMo 8-4

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