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309S stainless steel material chemical composition:
| Grade | C % | Cr % | Ni % | Mn % | P % | S % | Si % |
| 309S | ≤0.08 | 22.0-24.0 | 12.0-15.0 | ≤2.00 | ≤ 0.045 | ≤ 0.03 | ≤ 0.75 |
309s stainless steel properties:
309s stainless steel plate mechanical properties:
| Grade | Yield strength | Tensile strength | Elongation δ5 | Hardness |
| σs MPa | σb MPa | % | HB | |
| 309S | ≥205 | ≥515 | ≥40 | ≤217 |
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 |
309S stainless steel application
309S stainless steel is widely used in boilers, energy (nuclear power, thermal power, fuel cell), industrial furnaces, incinerator, heating furnace, chemical, petrochemical and other important areas.
309S stainless steel / SS309s is heat-resistant austenitic stainless steel materials.It has more performance than austenitic stainless steel. Besides,it is of high temperature-resistance, so slso named heat resistant steel,and is regarded as the first choice of heat treatment engineering.
