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China GB ZT740 钻探用无缝钢管 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: ZT740 / ZT740
Category Grade Standard Region/Area Standard Content
Metals ZT740 GB/T 9808 China 钻探用无缝钢管

Chemical composition(mass fraction)(wt.%) of the ZT740

Element Min Max Similar
S - 0.0300 -
P - 0.0300 -

Mechanical Properties of steel grade ZT740

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)
368 (≥) 795 (≥) 14 44 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 142

Physical Properties of steel grade ZT740

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 - -     0.32 -  
439 828 - 14.3 341   -  
193 - 24 11.2   142 134

Heat Treatment of steel grade ZT740

Heat treated : 1299°C - 1485°C

Technological Curves of steel grade ZT740

Cross Reference Table (Equivalent Grade) of ZT740

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