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G 21 Mn 5

Germany SEW G21Mn5 Steel casting for use at low temperature. Technical delivery conditions and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: G21Mn5 / G 21 Mn 5
Category Grade Standard Region/Area Standard Content
Metals G 21 Mn 5 SEW 685 Germany Steel casting for use at low temperature. Technical delivery conditions

Chemical composition(mass fraction)(wt.%) of the G 21 Mn 5

Element Min Max Similar
Si - 0.6000 -
S - 0.0150 -
P - 0.0200 -
Mn 1.1000 1.3000 -
Cr - 0.3000 -
C 0.1700 0.2300 -

Mechanical Properties of steel grade G 21 Mn 5

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)
515 (≥) 157 (≥) 41 34 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 344

Physical Properties of steel grade G 21 Mn 5

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
12 - -     0.14 -  
142 937 - 34.3 114   -  
127 - 13 42.2   332 112

Heat Treatment of steel grade G 21 Mn 5

Heat treated : 1944°C - 1322°C

Technological Curves of steel grade G 21 Mn 5

Cross Reference Table (Equivalent Grade) of G 21 Mn 5

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