ATI 20 (Superaustenitic) vs ATI 201LN Austenitic Stainless Steel (Cryogenic Grade)
Property comparison of ATI 20 (Superaustenitic) and ATI 201LN Austenitic Stainless Steel (Cryogenic Grade), both stainless steel.
| Property | ATI 20 (Superaustenitic) | ATI 201LN Austenitic Stainless Steel (Cryogenic Grade) | Difference |
|---|---|---|---|
| Yield strength | 380 MPa | 320 MPa | -16% |
| Tensile strength | 621 MPa | 685 MPa | +10% |
| Elongation | 40 % | 51 % | +28% |
| Elastic modulus | 193,000 MPa | 193,000 MPa | 0% |
| Density | 8,080 kg/m³ | 7,840 kg/m³ | -3% |
Difference is ATI 201LN Austenitic Stainless Steel (Cryogenic Grade) relative to ATI 20 (Superaustenitic). 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 N08020
- standard
- ASTM B463
- heat treatment
- Annealed
- grade
- 201LN
- standard
- ASTM A240; ASME SA-240; ASTM A666
- heat treatment
- Mill 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.
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