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Description

UK 309S20 austenitic special steel and 309S20 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Steel: 309S20
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Steel 309S20 UK austenitic special steel
434S17
215S15
304S51
316S51
316S52
321S51(1010)
321S51(1105)
347S51
321S31
303S31

Chemical composition(mass fraction)(wt.%) of the 309S20

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%)
Max 0.12 Max 1.00 Max 2.00 Max 0.045 Max 0.03 22.0-25.0 12.5-15.0

Mechanical Properties of steel grade 309S20

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)
676 (≥) 594 (≥) 13 14 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 321

Physical Properties of steel grade 309S20

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
32 - -     0.32 -  
857 215 - 14.3 323   -  
324 - 24 44.2   121 133

Heat Treatment of steel grade 309S20

Heat treated : 1142°C - 1214°C

Technological Curves of steel grade 309S20

Cross Reference Table (Equivalent Grade) of 309S20

Grade Standard Country Application
309S20 UK austenitic special steel

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