ATI 305 Austenitic Stainless Steel vs ATI 309 Austenitic Stainless Steel
Property comparison of ATI 305 Austenitic Stainless Steel and ATI 309 Austenitic Stainless Steel, both stainless steel.
| Property | ATI 305 Austenitic Stainless Steel | ATI 309 Austenitic Stainless Steel | Difference |
|---|---|---|---|
| Yield strength | 170 MPa | 290 MPa | +71% |
| Tensile strength | 485 MPa | 621 MPa | +28% |
| Elongation | 40 % | 49 % | +23% |
| Elastic modulus | 200,000 MPa | 200,000 MPa | 0% |
| Density | 7,900 kg/m³ | 8,030 kg/m³ | +2% |
| Thermal conductivity | 16.3 W/m·K | 15.6 W/m·K | -4% |
| Specific heat | 460 J/kg·K | 460 J/kg·K | 0% |
| Coefficient of thermal expansion | 0.000017 1/K | 0.000016 1/K | -6% |
Difference is ATI 309 Austenitic Stainless Steel relative to ATI 305 Austenitic Stainless Steel. Values are taken from the representative row of each material; both materials may have multiple heat treatments or conditions on their individual pages.
Identification
- grade
- 305
- standard
- ASTM A240
- heat treatment
- Annealed
- grade
- 309
- standard
- ASTM A167; ASTM A240
- heat treatment
- Annealed
About austenitic stainless steels
Austenitic stainless steels are the largest stainless family. They are non-magnetic in the annealed condition and gain corrosion resistance from chromium and nickel (and molybdenum in 316-class grades). They cannot be hardened by heat treatment and rely on cold work for higher strength. Includes the 300-series, super-austenitic grades (904L, AL-6XN), and high-nitrogen variants used in pressure vessels and chemical service.
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