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China GJB D50 炮弹用碳素钢棒规范 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: D50 / D50
Category Grade Standard Region/Area Standard Content
Metals D50 GJB 398A China 炮弹用碳素钢棒规范

Chemical composition(mass fraction)(wt.%) of the D50

Element Min Max Similar
C 0.4700 0.5500 -
Mn 0.5000 0.8000 -
Si 0.1700 0.3700 -
P - 0.0350 -
S - 0.0350 -
Cr - 0.2500 -
Ni - 0.2500 -
Cu - 0.2500 -

Mechanical Properties of steel grade D50

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)
984 (≥) 514 (≥) 23 22 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 414

Physical Properties of steel grade D50

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
33 - -     0.33 -  
697 499 - 24.3 434   -  
266 - 33 11.2   442 312

Heat Treatment of steel grade D50

Heat treated : 1614°C - 1742°C

Technological Curves of steel grade D50

Cross Reference Table (Equivalent Grade) of D50

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