304H Austenitic Stainless Steel (UNS S30409) vs Alloy 330 High-Temperature Austenitic
Property comparison of 304H Austenitic Stainless Steel (UNS S30409) and Alloy 330 High-Temperature Austenitic, both stainless steel.
| Property | 304H Austenitic Stainless Steel (UNS S30409) | Alloy 330 High-Temperature Austenitic | Difference |
|---|---|---|---|
| Yield strength | 206.8 MPa | 172 MPa | -17% |
| Tensile strength | 517.1 MPa | 483 MPa | -7% |
| Elongation | 40 % | 30 % | -25% |
| Elastic modulus | 199,955 MPa | 196,000 MPa | -2% |
| Coefficient of thermal expansion | 0.000017 1/K | 0.000018 1/K | +7% |
Difference is Alloy 330 High-Temperature Austenitic relative to 304H Austenitic Stainless Steel (UNS S30409). 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
- 304H
- standard
- ASTM A240
- heat treatment
- Annealed
- grade
- N08330
- standard
- AMS 5592 / ASTM B536
- 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.
What else is in Engineering Database
AI built for engineering. Searches the engineering database, performs calculations, gives source-backed engineering insights.
Get started for free ↗Reference Data375 engineering tablesMaterial properties, pipe and shape dimensions, code tables, and electrical ratings across mechanical, civil, chemical, electrical, materials, and manufacturing engineering.
Browse dataCalculatorsDeterministic engineering calculatorsSizing, checking, and conversion tools that run against the reference tables. Inputs are code-compliant, outputs are traceable to the source standard.
Browse calculators