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China GB 18Nb 低合金高强度结构钢 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 18Nb / 18Nb
Category Grade Standard Region/Area Standard Content
Metals 18Nb GB 1591 China 低合金高强度结构钢

Chemical composition(mass fraction)(wt.%) of the 18Nb

Element Min Max Similar

Mechanical Properties of steel grade 18Nb

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)
815 (≥) 296 (≥) 33 22 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 224

Physical Properties of steel grade 18Nb

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 -  
353 142 - 42.3 122   -  
841 - 31 11.2   413 141

Heat Treatment of steel grade 18Nb

Heat treated : 1856°C - 1765°C

Technological Curves of steel grade 18Nb

Cross Reference Table (Equivalent Grade) of 18Nb

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