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Description

UK 320S18 austenitic special steel and 320S18 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Steel: 320S18
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Steel 320S18 UK austenitic special steel
309S20
310S17
310S25
314S25
316S14
316S19
316S33
317S11
317S17
318S17

Chemical composition(mass fraction)(wt.%) of the 320S18

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%) Mo(%) Ti(%)
Max 0.08 Max 1.00 Max 2.00 Max 0.045 Max 0.03 16.5-18.5 10.5-13.5 2.00-2.50 5×CMax 0.80

Mechanical Properties of steel grade 320S18

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)
377 (≥) 989 (≥) 31 12 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 211

Physical Properties of steel grade 320S18

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
33 - -     0.33 -  
849 257 - 11.3 343   -  
149 - 22 21.2   314 242

Heat Treatment of steel grade 320S18

Heat treated : 1352°C - 1439°C

Technological Curves of steel grade 320S18

Cross Reference Table (Equivalent Grade) of 320S18

Grade Standard Country Application
320S18 UK austenitic special steel

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