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18 CrNiMo 7-6

Germany DIN 18CrNiMo7-6 Case hardening steels - Technical delivery conditions and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 18CrNiMo7-6 / 18 CrNiMo 7-6
Category Grade Standard Region/Area Standard Content
Metals 18 CrNiMo 7-6 DIN EN 10084 Germany Case hardening steels - Technical delivery conditions

Chemical composition(mass fraction)(wt.%) of the 18 CrNiMo 7-6

Element Min Max Similar
Mo 0.2500 0.3500 -
Ni 1.4000 1.7000 -
Cr 1.5000 1.8000 -
P - 0.0350 -
S - 0.0350 -
Mn 0.5000 0.9000 -
Si - 0.4000 -
C 0.1500 0.2100 -

Mechanical Properties of steel grade 18 CrNiMo 7-6

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)
222 (≥) 268 (≥) 42 42 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 311

Physical Properties of steel grade 18 CrNiMo 7-6

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
44 - -     0.41 -  
787 864 - 44.3 124   -  
928 - 24 31.2   321 234

Heat Treatment of steel grade 18 CrNiMo 7-6

Heat treated : 1945°C - 1812°C

Technological Curves of steel grade 18 CrNiMo 7-6

Cross Reference Table (Equivalent Grade) of 18 CrNiMo 7-6

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