ATI 439HP Ferritic Stainless Steel vs ATI 441HP Ferritic Stainless Steel
Property comparison of ATI 439HP Ferritic Stainless Steel and ATI 441HP Ferritic Stainless Steel, both stainless steel.
| Property | ATI 439HP Ferritic Stainless Steel | ATI 441HP Ferritic Stainless Steel | Difference |
|---|---|---|---|
| Yield strength | 290 MPa | 310 MPa | +7% |
| Tensile strength | 455 MPa | 496 MPa | +9% |
| Elongation | 34 % | 31 % | -9% |
| Elastic modulus | 200,000 MPa | 200,000 MPa | 0% |
| Density | 7,695 kg/m³ | 7,711 kg/m³ | 0% |
| Coefficient of thermal expansion | 0.00001 1/K | 0.00001 1/K | 0% |
Difference is ATI 441HP Ferritic Stainless Steel relative to ATI 439HP 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 S43035
- standard
- ASTM A240/A268/A479
- heat treatment
- Annealed
- grade
- UNS S44100
- standard
- ASTM A240/A554
- 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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