ATI 418 SPL Stainless Steel (Greek Ascoloy) vs Custom 455
Property comparison of ATI 418 SPL Stainless Steel (Greek Ascoloy) and Custom 455, both stainless steel.
| Property | ATI 418 SPL Stainless Steel (Greek Ascoloy) | Custom 455 | Difference |
|---|---|---|---|
| Yield strength | 586 MPa | 1,276 MPa | +118% |
| Tensile strength | 793 MPa | 1,379 MPa | +74% |
| Elongation | 18 % | 10 % | -44% |
| Elastic modulus | 200,000 MPa | 196,501 MPa | -2% |
| Density | 7,860 kg/m³ | 7,750 kg/m³ | -1% |
Difference is Custom 455 relative to ATI 418 SPL Stainless Steel (Greek Ascoloy). 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 S41800
- standard
- AMS 5508
- heat treatment
- Annealed
- grade
- Custom 455
- standard
- MIL-HDBK-5J
- heat treatment
- H1000
About 400-series stainless steels
Martensitic and ferritic stainless steels carry less nickel than the 300-series and remain magnetic. 410 and 420 are hardenable by quench and temper and are used for cutlery, shafts, and valve parts. 430 stays soft and is used for cosmetic trim and mild corrosion service. Compared to 300-series grades they trade general corrosion resistance for hardenability.
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