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30 CrNiMo 8

Spain UNE 30CrNiMo8 Quenched and tempered steels. Part 1: technical delivery conditions for special steels and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 30CrNiMo8 / 30 CrNiMo 8
Category Grade Standard Region/Area Standard Content
Metals 30 CrNiMo 8 UNE 36051-1 Spain Quenched and tempered steels. Part 1: technical delivery conditions for special steels

Chemical composition(mass fraction)(wt.%) of the 30 CrNiMo 8

Element Min Max Similar
Si - 0.4000 -
S - 0.0350 -
P - 0.0350 -
Ni 1.8000 2.2000 -
Mo 0.3000 0.5000 -
Mn 0.3000 0.6000 -
Cr 1.8000 2.2000 -
C 0.2600 0.3400 -
Si - 0.4000 -
S - 0.0350 -
P - 0.0350 -
Ni 1.8000 2.2000 -
Mo 0.3000 0.5000 -
Mn 0.5000 0.8000 -
Cr 1.8000 2.2000 -
C 0.2600 0.3400 -
Si - 0.4000 -
S - 0.0350 -
P - 0.0350 -
Ni 1.8000 2.2000 -
Mo 0.3000 0.5000 -
Mn 0.3000 0.6000 -
Cr 1.8000 2.2000 -
C 0.2600 0.3400 -

Mechanical Properties of steel grade 30 CrNiMo 8

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)
628 (≥) 564 (≥) 14 12 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 331

Physical Properties of steel grade 30 CrNiMo 8

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
24 - -     0.23 -  
155 382 - 12.3 334   -  
121 - 14 31.2   313 224

Heat Treatment of steel grade 30 CrNiMo 8

Heat treated : 1714°C - 1517°C

Technological Curves of steel grade 30 CrNiMo 8

Cross Reference Table (Equivalent Grade) of 30 CrNiMo 8

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