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China NB S31668 承压设备用不锈钢和耐热钢锻件 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: S31668 / S31668
Category Grade Standard Region/Area Standard Content
Metals S31668 NB/T 47010 China 承压设备用不锈钢和耐热钢锻件

Chemical composition(mass fraction)(wt.%) of the S31668

Element Min Max Similar
S - 0.0200 -
P - 0.0350 -
Ti 0.4000 0.7000 -
Mo 2.0000 3.0000 -
Ni 10.0000 14.0000 -
Cr 16.0000 18.0000 -
Mn - 2.0000 -
Si - 1.0000 -
C - 0.0800 -

Mechanical Properties of steel grade S31668

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)
189 (≥) 994 (≥) 11 42 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 221

Physical Properties of steel grade S31668

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
44 - -     0.22 -  
841 298 - 32.3 233   -  
271 - 41 34.2   314 312

Heat Treatment of steel grade S31668

Heat treated : 1839°C - 1559°C

Technological Curves of steel grade S31668

Cross Reference Table (Equivalent Grade) of S31668

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