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China GJB D40Mn2 炮弹用无缝钢管规范 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: D40Mn2 / D40Mn2
Category Grade Standard Region/Area Standard Content
Metals D40Mn2 GJB 6482 China 炮弹用无缝钢管规范

Chemical composition(mass fraction)(wt.%) of the D40Mn2

Element Min Max Similar
C 0.3700 0.4400 -
Si 0.1700 0.3700 -
Mn 1.4000 2.0000 -
P - 0.0250 -
S - 0.0250 -
Cr - 0.3000 -
Ni - 0.3000 -
Mo - 0.1500 -
Cu - 0.3000 -

Mechanical Properties of steel grade D40Mn2

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)
651 (≥) 797 (≥) 31 43 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 421

Physical Properties of steel grade D40Mn2

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
21 - -     0.24 -  
371 129 - 41.3 222   -  
654 - 33 41.2   344 341

Heat Treatment of steel grade D40Mn2

Heat treated : 1832°C - 1644°C

Technological Curves of steel grade D40Mn2

Cross Reference Table (Equivalent Grade) of D40Mn2

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