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21 CrMoV 5-7

EU EN 21CrMoV5-7 steels and nickel alloys for fasteners with specified elevated and/or low temperature properties and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 21CrMoV5-7 / 21 CrMoV 5-7
Category Grade Standard Region/Area Standard Content
Metals 21 CrMoV 5-7 EN 10269 EU steels and nickel alloys for fasteners with specified elevated and/or low temperature properties

Chemical composition(mass fraction)(wt.%) of the 21 CrMoV 5-7

Element Min Max Similar
V 0.2000 0.3500 -
Mo 0.5500 0.8000 -
Ni - 0.6000 -
Cr 1.2000 1.5000 -
P - 0.0300 -
S - 0.0300 -
Mn 0.4000 0.8000 -
Si - 0.4000 -
C 0.1700 0.2500 -

Mechanical Properties of steel grade 21 CrMoV 5-7

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)
953 (≥) 413 (≥) 11 44 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 323

Physical Properties of steel grade 21 CrMoV 5-7

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
42 - -     0.11 -  
545 664 - 23.3 231   -  
197 - 41 44.2   341 121

Heat Treatment of steel grade 21 CrMoV 5-7

Heat treated : 1714°C - 1824°C

Technological Curves of steel grade 21 CrMoV 5-7

Cross Reference Table (Equivalent Grade) of 21 CrMoV 5-7

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