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20 NiCrMo 4 F

EU EU 20NiCrMo4F 球轴承和滚动轴承钢 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 20NiCrMo4F / 20 NiCrMo 4 F
Category Grade Standard Region/Area Standard Content
Metals 20 NiCrMo 4 F EU 94 EU 球轴承和滚动轴承钢

Chemical composition(mass fraction)(wt.%) of the 20 NiCrMo 4 F

Element Min Max Similar
Si 0.1500 0.4000 -
S - 0.0350 -
P - 0.0350 -
Ni 0.9000 1.2000 -
Mo 0.1500 0.2500 -
Mn 0.4000 0.7000 -
Cr 0.3500 0.6500 -
C 0.1700 0.2300 -

Mechanical Properties of steel grade 20 NiCrMo 4 F

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)
385 (≥) 541 (≥) 11 33 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 232

Physical Properties of steel grade 20 NiCrMo 4 F

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
23 - -     0.12 -  
355 345 - 42.3 441   -  
439 - 32 11.2   423 222

Heat Treatment of steel grade 20 NiCrMo 4 F

Heat treated : 1663°C - 1616°C

Technological Curves of steel grade 20 NiCrMo 4 F

Cross Reference Table (Equivalent Grade) of 20 NiCrMo 4 F

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