309S stainless steel 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.
309S Stainless Steel Chemistry Data :
Carbon 0.08 max
Chromium 22 - 24
Iron Balance
Manganese 2 max
Nickel 12 - 15
Phosphorus 0.045 max
Silicon 1 max
Sulphur 0.03 max
309S Stainless Steel Physical Properties:
Density (lb./ in^2) @ RT 0.29
Modulus of Elasticity in Tension (psi x 10^6) 29.0
Specific Heat (BTU/o F/lb.) 32 to 212 oF 0.12
Thermal Conductivity (BTU/hr/ft^2/ft) 212oF 9.0
932oF 10.8
Mean Coefficient of Thermal Expansion (in. x 10^-6 per o F) 32 to 212oF 8.3
32 to 600oF 9.3
32 to 1,000oF 9.6
32 to 1,200oF 10.0
Electrical Resistivity (micro ohms - cm) at 70oF 39.8
Melting Point Range (oF) 2550 - 2650
Oxidation Resistance - Continuous Service(oF) 2000
Oxidation Resistance - Intermittent Service(oF) 1800
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