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China 宝钢Q/BQB 34CrMo4 氧气瓶用无缝钢管 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 34CrMo4 / 34CrMo4
Category Grade Standard Region/Area Standard Content
Metals 34CrMo4 Q/BQB 250 China 氧气瓶用无缝钢管

Chemical composition(mass fraction)(wt.%) of the 34CrMo4

Element Min Max Similar
Cu - 0.2000 -
Mo 0.1500 0.2500 -
Ni - 0.3000 -
Cr 0.9000 1.2000 -
P - 0.0250 -
S - 0.0200 -
Mn 0.5000 0.8000 -
Si 0.1500 0.3500 -
C 0.3000 0.3700 -

Mechanical Properties of steel grade 34CrMo4

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)
345 (≥) 316 (≥) 42 41 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 343

Physical Properties of steel grade 34CrMo4

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
34 - -     0.32 -  
477 165 - 33.3 342   -  
447 - 14 42.2   224 341

Heat Treatment of steel grade 34CrMo4

Heat treated : 1786°C - 1193°C

Technological Curves of steel grade 34CrMo4

Cross Reference Table (Equivalent Grade) of 34CrMo4

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