Types 309 Stainless Steel and 309S are austenitic chromium-nickel stainless steels that provide excellent corrosion resistance and heat resistance plus good strength at room and elevated temperatures. Type 309S Stainless Steel is identical to Type 309 except for a lower carbon content that minimizes carbide precipitation and improves weldability. They are essentially nonmagnetic as annealed and become lightly magnetic when cold worked.
309 Stainless Steel Chemistry Data
Carbon 0.2 max
Chromium 22 - 24
Iron Balance
Manganese 2 max
Nickel 12 - 15
Phosphorus 0.045 max
Silicon 1 max
Sulphur 0.03 max
309 Stainless Steel Applications:
furnace parts, heating elements, aircraft and jet engine parts, heat exchangers, sulfite liquor handling equipment, kiln liners, boiler baffles, refinery and chemical processing equipment, and auto exhaust parts
309 Stainless Steel Physical Data :
Density (lb / cu. in.) 0.287
Specific Gravity 7.9
Specific Heat (Btu/lb/Deg F - [32-212 Deg F]) 0.12
Electrical Resistivity (microhm-cm (at 68 Deg F)) 468
Melting Point (Deg F) 2650
Modulus of Elasticity Tension 29
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