SS304L Stainless Steel
SS304L is the low-carbon version of SS304, combining general corrosion resistance, formability and weldability with reduced susceptibility to chromium carbide precipitation during welding.
SS304L Grade Information
SS304L, commonly designated AISI 304L, is a low-carbon austenitic chromium-nickel stainless steel. Its chemistry is closely related to SS304, but the lower carbon limit reduces the tendency for chromium carbide precipitation during welding.
For Spiral Wound Gaskets, SS304L may be selected as metallic winding material and for compatible ring components where its corrosion resistance, temperature capability and process compatibility meet the required service conditions.
| Material specification | ASTM A240 |
|---|---|
| Specified grade / UNS | 304L S30403 |
SS304L Stainless Steel Chemical Composition
ASTM A240 · Grade-specific requirements
| Element / requirement | Value |
|---|---|
| C % | ≤0.030 |
| Mn % | ≤2.00 |
| P % | ≤0.045 |
| S % | ≤0.030 |
| Si % | ≤0.75 |
| Cr % | 18.0–20.0 |
| Ni % | 8.0–12.0 |
| Mo % | - |
| N % | ≤0.10 |
| Cu % | - |
| Other elements | - |
SS304L Stainless Steel Mechanical Properties
ASTM A240 · Grade-specific requirements
| Tensile min (MPa) | Yield min (MPa) | Elongation min (%) | Hardness max |
|---|---|---|---|
| 485 | 170 | 40 | ≤201 HBW |
ASTM A240 Grade Reference
304L S30403
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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