253 MA High-Temperature Austenitic vs 304H Austenitic Stainless Steel (UNS S30409)
Property comparison of 253 MA High-Temperature Austenitic and 304H Austenitic Stainless Steel (UNS S30409), both stainless steel.
| Property | 253 MA High-Temperature Austenitic | 304H Austenitic Stainless Steel (UNS S30409) | Difference |
|---|---|---|---|
| Yield strength | 310 MPa | 206.8 MPa | -33% |
| Tensile strength | 650 MPa | 517.1 MPa | -20% |
| Elongation | 40 % | 40 % | 0% |
| Elastic modulus | 200,000 MPa | 199,955 MPa | 0% |
| Coefficient of thermal expansion | 0.000019 1/K | 0.000017 1/K | -13% |
Difference is 304H Austenitic Stainless Steel (UNS S30409) relative to 253 MA High-Temperature Austenitic. 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
- S30815
- standard
- ASTM A240 / EN 10028
- heat treatment
- Annealed
- grade
- 304H
- standard
- 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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