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England B.S. 309S20 Specification for stainless and heat-resisting steel round wire and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 309S20 / 309 S 20
Category Grade Standard Region/Area Standard Content
Metals 309 S 20 BS 1554 England Specification for stainless and heat-resisting steel round wire

Chemical composition(mass fraction)(wt.%) of the 309 S 20

Element Min Max Similar
Si - 1.0000 -
S - 0.0300 -
P - 0.0450 -
Ni 12.0000 15.0000 -
Mn - 2.0000 -
Cr 22.0000 25.0000 -
C - 0.1200 -

Mechanical Properties of steel grade 309 S 20

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)
692 (≥) 779 (≥) 14 31 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 323

Physical Properties of steel grade 309 S 20

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
41 - -     0.11 -  
367 469 - 32.3 442   -  
113 - 31 22.2   211 242

Heat Treatment of steel grade 309 S 20

Heat treated : 1184°C - 1759°C

Technological Curves of steel grade 309 S 20

Cross Reference Table (Equivalent Grade) of 309 S 20

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