SS904L
SS904L is a high-alloy, low-carbon austenitic stainless steel containing elevated nickel and molybdenum plus copper. It provides improved resistance to reducing acids and chloride-induced localized corrosion compared with standard 300-series grades.
SS904L Information
SS904L is a high-alloy, low-carbon austenitic stainless steel containing elevated nickel and molybdenum plus copper. It provides improved resistance to reducing acids and chloride-induced localized corrosion compared with standard 300-series grades.
Metallic winding and compatible ring components where service conditions are suitable.
| Material specification | ASTM A240 |
|---|---|
| Specified grade / UNS | 904L N08904 |
SS904L Chemical Composition
ASTM A240 · Grade-specific requirements
| Element / requirement | Value |
|---|---|
| C % | ≤0.020 |
| Mn % | ≤2.00 |
| P % | ≤0.045 |
| S % | ≤0.035 |
| Si % | ≤1.00 |
| Cr % | 19.0–23.0 |
| Ni % | 23.0–28.0 |
| Mo % | 4.00–5.00 |
| N % | ≤0.10 |
| Cu % | 1.00–2.00 |
| Other elements | - |
SS904L Mechanical Properties
ASTM A240 · Grade-specific requirements
| Tensile min (MPa) | Yield min (MPa) | Elongation min (%) | Hardness max |
|---|---|---|---|
| 490 | 220 | 35 | ≤90 HRBW |
ASTM A240 Grade Reference
904L N08904
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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