SS321
SS321 is a titanium-stabilized austenitic stainless steel based on the 18-8 Cr-Ni family. Titanium ties up carbon as stable carbides, improving resistance to intergranular corrosion after exposure in the sensitization temperature range.
SS321 Information
SS321 is a titanium-stabilized austenitic stainless steel based on the 18-8 Cr-Ni family. Titanium ties up carbon as stable carbides, improving resistance to intergranular corrosion after exposure in the sensitization temperature range.
Metallic winding and compatible ring components where service conditions are suitable.
| Material specification | ASTM A240 |
|---|---|
| Specified grade / UNS | 321 S32100 |
SS321 Chemical Composition
ASTM A240 · Grade-specific requirements
| Element / requirement | Value |
|---|---|
| C % | ≤0.08 |
| Mn % | ≤2.00 |
| P % | ≤0.045 |
| S % | ≤0.030 |
| Si % | ≤0.75 |
| Cr % | 17.0–19.0 |
| Ni % | 9.0–12.0 |
| Mo % | - |
| N % | ≤0.10 |
| Cu % | - |
| Other elements | Ti 5×(C+N) min; 0.70 max |
SS321 Mechanical Properties
ASTM A240 · Grade-specific requirements
| Tensile min (MPa) | Yield min (MPa) | Elongation min (%) | Hardness max |
|---|---|---|---|
| 515 | 205 | 40 | ≤217 HBW |
ASTM A240 Grade Reference
321 S32100
The chemical and mechanical tables on this page use the ASTM A240 requirements for this grade, including the product conditions listed in the standard overview.
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