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England B.S. 318C17 Specification for steel castings for pressure purposes and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 318C17 / 318 C 17
Category Grade Standard Region/Area Standard Content
Metals 318 C 17 BS 1504 England Specification for steel castings for pressure purposes

Chemical composition(mass fraction)(wt.%) of the 318 C 17

Element Min Max Similar
Si - 1.0000 -
S - 0.0300 -
P - 0.0450 -
Ni 11.0000 14.0000 -
Mo 2.0000 3.0000 -
Mn - 2.0000 -
Cr 18.0000 20.0000 -
C - 0.0800 -

Mechanical Properties of steel grade 318 C 17

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)
797 (≥) 398 (≥) 32 24 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 324

Physical Properties of steel grade 318 C 17

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
13 - -     0.33 -  
423 989 - 14.3 232   -  
535 - 31 41.2   334 213

Heat Treatment of steel grade 318 C 17

Heat treated : 1189°C - 1265°C

Technological Curves of steel grade 318 C 17

Cross Reference Table (Equivalent Grade) of 318 C 17

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