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England B.S. 320S18 Specification for stainless and heat-resisting steel round wire and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 320S18 / 320 S 18
Category Grade Standard Region/Area Standard Content
Metals 320 S 18 BS 1554 England Specification for stainless and heat-resisting steel round wire

Chemical composition(mass fraction)(wt.%) of the 320 S 18

Element Min Max Similar
Si - 1.0000 -
S - 0.0300 -
P - 0.0450 -
Ni 10.5000 13.5000 -
Mo 2.0000 2.5000 -
Mn - 2.0000 -
Cr 16.5000 18.5000 -
C - 0.0800 -

Mechanical Properties of steel grade 320 S 18

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)
167 (≥) 312 (≥) 24 44 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 333

Physical Properties of steel grade 320 S 18

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
14 - -     0.42 -  
814 359 - 12.3 324   -  
145 - 23 41.2   132 321

Heat Treatment of steel grade 320 S 18

Heat treated : 1622°C - 1989°C

Technological Curves of steel grade 320 S 18

Cross Reference Table (Equivalent Grade) of 320 S 18

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