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China GB L415NB 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: L415NB / L415NB
Category Grade Standard Region/Area Standard Content
Metals L415NB 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 L415NB

Element Min Max Similar
S - 0.0200 -
P - 0.0250 -
Mn - 1.6000 -
C - 0.2100 -

Mechanical Properties of steel grade L415NB

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)
943 (≥) 333 (≥) 33 12 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 443

Physical Properties of steel grade L415NB

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
11 - -     0.42 -  
558 389 - 44.3 131   -  
385 - 13 21.2   114 213

Heat Treatment of steel grade L415NB

Heat treated : 1934°C - 1575°C

Technological Curves of steel grade L415NB

Cross Reference Table (Equivalent Grade) of L415NB

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