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China GB L450MB 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: L450MB / L450MB
Category Grade Standard Region/Area Standard Content
Metals L450MB 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 L450MB

Element Min Max Similar

Mechanical Properties of steel grade L450MB

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)
399 (≥) 815 (≥) 44 24 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 341

Physical Properties of steel grade L450MB

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 - -     0.14 -  
481 156 - 33.3 143   -  
152 - 33 11.2   131 341

Heat Treatment of steel grade L450MB

Heat treated : 1543°C - 1728°C

Technological Curves of steel grade L450MB

Cross Reference Table (Equivalent Grade) of L450MB

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