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X12MoCrNi4-4-3

France AFNOR NF X12MoCrNi4-4-3 Iron and steel. Steels for bearings. Types and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: X12MoCrNi4-4-3 / X12MoCrNi4-4-3
Category Grade Standard Region/Area Standard Content
Metals X12MoCrNi4-4-3 NF A35-565 France Iron and steel. Steels for bearings. Types

Chemical composition(mass fraction)(wt.%) of the X12MoCrNi4-4-3

Element Min Max Similar
W - 0.2000 -
V 1.1000 1.3000 -
Si 0.1000 0.2500 -
S - 0.0150 -
P - 0.0150 -
Ni 3.2000 3.7000 -
Mo 4.0000 4.5000 -
Mn 0.1000 0.3500 -
Cu - 0.2000 -
Cr 3.7500 4.5000 -
C 0.1000 0.1600 -

Mechanical Properties of steel grade X12MoCrNi4-4-3

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)
465 (≥) 147 (≥) 42 33 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 424

Physical Properties of steel grade X12MoCrNi4-4-3

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
43 - -     0.31 -  
355 139 - 14.3 413   -  
264 - 12 44.2   234 214

Heat Treatment of steel grade X12MoCrNi4-4-3

Heat treated : 1351°C - 1634°C

Technological Curves of steel grade X12MoCrNi4-4-3

Cross Reference Table (Equivalent Grade) of X12MoCrNi4-4-3

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