ATI 409HP Ferritic Stainless Steel vs ATI 410S Ferritic Stainless Steel (ASTM Minimum)
Property comparison of ATI 409HP Ferritic Stainless Steel and ATI 410S Ferritic Stainless Steel (ASTM Minimum), both stainless steel.
| Property | ATI 409HP Ferritic Stainless Steel | ATI 410S Ferritic Stainless Steel (ASTM Minimum) | Difference |
|---|---|---|---|
| Yield strength | 241 MPa | 290 MPa | +20% |
| Tensile strength | 434 MPa | 444 MPa | +2% |
| Elongation | 33 % | 33 % | 0% |
| Elastic modulus | 200,000 MPa | 200,000 MPa | 0% |
| Density | 7,760 kg/m³ | 7,730 kg/m³ | 0% |
| Thermal conductivity | 25 W/m·K | 26.9 W/m·K | +8% |
| Specific heat | 477 J/kg·K | 460 J/kg·K | -4% |
| Coefficient of thermal expansion | 0.000011 1/K | 0.000011 1/K | +3% |
Difference is ATI 410S Ferritic Stainless Steel (ASTM Minimum) relative to ATI 409HP Ferritic 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
- UNS S40900/S40930
- standard
- ASTM A240/A240M
- heat treatment
- Annealed
- grade
- UNS S41008
- standard
- ASTM A240
- heat treatment
- Annealed
About ferritic stainless steels
Ferritic stainless steels are magnetic, body-centered cubic, and cannot be hardened by heat treatment. They are cheaper than austenitic grades because they carry little or no nickel. 409 and 439 are the standard automotive exhaust grades; 444 and the superferritic grades (29-4C, E-Brite) handle chloride and seawater service better than 316 at lower nickel cost.
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