SS304 Stainless Steel
SS304 is a widely used austenitic chromium-nickel stainless steel combining corrosion resistance, mechanical strength, formability and weldability for general industrial sealing service.
SS304 Grade Information
SS304 is a widely used austenitic chromium-nickel stainless steel combining corrosion resistance, mechanical strength, formability and weldability for general industrial sealing service.
Indian stainless flat-product standard, revised as IS 6911:2026. The selected grade connections below are documented in BIS product guidance; exact 2026 grade designations must be checked against the ordered standard.
| Material specification | IS 6911 |
|---|---|
| Material identification | S30400 |
| Product / supply condition | Specify hot/cold rolled condition, heat treatment, thickness and finish. |
SS304 Stainless Steel Chemical Composition
Manufacturer typical composition, mass %; selected elements only.
| Element / description | Mass % / reference value |
|---|---|
| C | 0.04 |
| Cr | 18.1 |
| Ni | 8.1 |
| Mo | — |
| Other | — |
SS304 Stainless Steel Mechanical Properties
Published reference values for the stated form and condition. Typical values are not specification acceptance limits.
| Product form / condition | Tensile (MPa) | 0.2% proof / yield (MPa) | Elongation (%) | Data basis |
|---|---|---|---|---|
| Hot-rolled plate, usually 10–20 mm, transverse; room temperature | 600 | 270 | 55 | Manufacturer typical values; elongation A5. |
Manufacturer reference data is shown for comparison. Use the selected IS 6911 edition and certified material test results for acceptance. Confirm specimen direction, gauge length, thickness and heat treatment.
IS 6911 Grade Reference
S30400
| Material specification | IS 6911 |
|---|---|
| Source edition | IS 6911:2026 |
| Publication status | Revised in 2026 |
| Product / supply condition | Specify hot/cold rolled condition, heat treatment, thickness and finish. |
| Specification information | The 2017 edition was withdrawn after 18 August 2026. The 2026 revision updates grade designations and includes 153 grades across five steel classes. The three grades linked here are a selected, source-supported subset, not the full scope. |
| Comparison tables | View the IS 6911 comparison tables |
| Material overview | View SS304 in Materials |
| Source reference | BIS — IS 6911:2026 implementation circular, 23 April 2026 |
| Source reference | BIS — IS 4351 product manual, Annex A (documented IS 6911 grade references) |
| Source reference | Outokumpu — Steel Grades, Properties and Global Standards, Tables 4, 5 and 7 |
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