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21 MnCr 6 3

Germany DIN 21MnCr63 Cold formed welded structural hollow sections of non-alloy and fine grain steels and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 21MnCr63 / 21 MnCr 6 3
Category Grade Standard Region/Area Standard Content
Metals 21 MnCr 6 3 -- Germany Cold formed welded structural hollow sections of non-alloy and fine grain steels

Chemical composition(mass fraction)(wt.%) of the 21 MnCr 6 3

Element Min Max Similar
V - 0.1000 -
Ti - 0.0500 -
Si - 0.5000 -
S - 0.0250 -
P - 0.0300 -
Ni - 0.3000 -
Nb - 0.0500 -
N - 0.0200 -
Mo - 0.2000 -
Mn - 1.5000 -
Cr+Cu+Mo - 0.6000 -
C - 0.1400 -
Al 0.0200 - -

Mechanical Properties of steel grade 21 MnCr 6 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)
763 (≥) 994 (≥) 24 23 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 423

Physical Properties of steel grade 21 MnCr 6 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
23 - -     0.23 -  
398 439 - 32.3 141   -  
589 - 22 32.2   334 443

Heat Treatment of steel grade 21 MnCr 6 3

Heat treated : 1578°C - 1452°C

Technological Curves of steel grade 21 MnCr 6 3

Cross Reference Table (Equivalent Grade) of 21 MnCr 6 3

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