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China GB L485QB 石油天然气工业 输送钢管 交货技术条件 第2部分:B级钢管 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: L485QB / L485QB
Category Grade Standard Region/Area Standard Content
Metals L485QB GB/T 9711.2 China 石油天然气工业 输送钢管 交货技术条件 第2部分:B级钢管

Chemical composition(mass fraction)(wt.%) of the L485QB

Element Min Max Similar

Mechanical Properties of steel grade L485QB

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)
554 (≥) 238 (≥) 21 24 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 144

Physical Properties of steel grade L485QB

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
41 - -     0.14 -  
144 665 - 13.3 111   -  
885 - 14 21.2   133 132

Heat Treatment of steel grade L485QB

Heat treated : 1274°C - 1998°C

Technological Curves of steel grade L485QB

Cross Reference Table (Equivalent Grade) of L485QB

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