254 SMO Super-Austenitic vs Alloy 904L Super-Austenitic
Property comparison of 254 SMO Super-Austenitic and Alloy 904L Super-Austenitic, both stainless steel.
| Property | 254 SMO Super-Austenitic | Alloy 904L Super-Austenitic | Difference |
|---|---|---|---|
| Yield strength | 300 MPa | 220 MPa | -27% |
| Tensile strength | 650 MPa | 490 MPa | -25% |
| Elongation | 35 % | 36 % | +3% |
| Elastic modulus | 200,000 MPa | 190,000 MPa | -5% |
| Density | 8,000 kg/m³ | 7,950 kg/m³ | -1% |
| Thermal conductivity | 13 W/m·K | 12.9 W/m·K | -1% |
| Specific heat | 460 J/kg·K | 460 J/kg·K | 0% |
Difference is Alloy 904L Super-Austenitic relative to 254 SMO Super-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
- S31254
- standard
- ASTM A240
- heat treatment
- Annealed
- grade
- N08904
- standard
- ASTM A240/B625
- 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