SS347
SS347 is a niobium-stabilized austenitic stainless steel related to SS304. Niobium stabilizes carbon, improving resistance to intergranular corrosion after welding or exposure in the sensitization temperature range.
SS347 Information
SS347 is a niobium-stabilized austenitic stainless steel related to SS304. Niobium stabilizes carbon, improving resistance to intergranular corrosion after welding or exposure in the sensitization temperature range.
Metallic winding and compatible ring components where service conditions are suitable.
| Material specification | ASTM A240 |
|---|---|
| Specified grade / UNS | 347 S34700 |
SS347 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 % | 9.0–13.0 |
| Mo % | - |
| N % | - |
| Cu % | - |
| Other elements | Nb 10×C min; 1.00 max |
SS347 Mechanical Properties
ASTM A240 · Grade-specific requirements
| Tensile min (MPa) | Yield min (MPa) | Elongation min (%) | Hardness max |
|---|---|---|---|
| 515 | 205 | 40 | ≤201 HBW |
ASTM A240 Grade Reference
347 S34700
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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