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France AFNOR NF L485QB 易燃液体输送管线 - 钢管交货技术条件 - 第2部分:B级要求的管道 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: L485QB / L 485 QB
Category Grade Standard Region/Area Standard Content
Metals L 485 QB NF EN 10208-2 France 易燃液体输送管线 - 钢管交货技术条件 - 第2部分:B级要求的管道

Chemical composition(mass fraction)(wt.%) of the L 485 QB

Element Min Max Similar

Mechanical Properties of steel grade L 485 QB

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)
749 (≥) 748 (≥) 42 23 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 242

Physical Properties of steel grade L 485 QB

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 - -     0.12 -  
665 315 - 23.3 431   -  
522 - 31 41.2   134 123

Heat Treatment of steel grade L 485 QB

Heat treated : 1726°C - 1598°C

Technological Curves of steel grade L 485 QB

Cross Reference Table (Equivalent Grade) of L 485 QB

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