SS 304 coils are available for enquiry as stainless steel flat products. A versatile austenitic stainless steel with good general corrosion resistance and formability. This grade is specified by its material standard and UNS designation; the right finish and tolerance depend on fabrication and service conditions.
For coils, send thickness, width and coil weight or length, plus finish, quantity and destination. Confirm size availability and any project-specific testing before placing an order. For welded work, ask about the corresponding low-carbon variant (304L) and its certificate.
Quick specifications
| Property | Specification / ordering detail |
|---|---|
| Material standard | ASTM A240 / ASME SA240 (flat-rolled stainless steel) |
| Grades covered | SS 304 (S30400); 304L (S30403) is a distinct low-carbon grade. Dual certification only when supported by the certificate. |
| Thickness range | Specify thickness; stock range on request |
| Width / size range | Specify width; availability on request |
| Length | Coil weight / length on request |
| Finish options | Mill, 2B or BA as appropriate; confirm processing route, slit edges and finish availability |
| Form | Flat-rolled strip wound in coils; state coil ID, OD and weight |
Equivalent designations
| System | Designation |
|---|---|
| UNS | S30400 |
| Werkstoff Nr. | 1.4301 |
| JIS | SUS 304 |
| EN | 1.4301 |
| BS | 304S31 |
Chemical composition
Published typical values by Outokumpu, mass %. A dash means no typical value stated in the cited summary, not zero or an ASTM limit. Request the actual MTC for supplied material.
| Grade / basis | C | Mn | Si | P | S | Cr | Ni | Mo | N |
|---|---|---|---|---|---|---|---|---|---|
| SS 304 typical (%) | 0.04 | — | — | — | — | 18.1 | 8.1 | — | — |
Mechanical properties
ASTM A240 minimums for plate, sheet and strip, annealed condition. Hardness is not stated in this cited summary; check the applicable purchase standard and MTC.
| Grade / ASTM A240 minima | Tensile (MPa) | 0.2% yield (MPa) | Elongation (%) | Hardness |
|---|---|---|---|---|
| SS 304 | 515 | 205 | 40 | — |
Source: Outokumpu Core 304 / Steel Grades guide ↗. Values vary by product form, condition and standard; not a substitute for the material certificate.
What these numbers mean for a buyer
The chemistry row shows a published typical production example, not min/max acceptance ranges. The mechanical row shows minimum values from the cited ASTM A240 summary, not guaranteed results for any individual coil or plate. Review the exact heat number and measured results on the supplied EN 10204 3.1 mill certificate. UNS identifies the alloy; thickness, finish and dimensional tolerances must still be specified separately.
Practical ordering checklist
- Material grade and UNS, plus whether dual certification is required.
- ASTM/ASME or EN standard and revision required by the project.
- Thickness, width, coil weight or length, plus tolerances and edge condition.
- Finish, quantity, delivery destination and packing requirements.
- MTC, inspection, surface testing and any project-specific corrosion test.
Forms and finishes
Coils are flat-rolled forms, but ordering dimensions and feasible finishes vary by thickness, route and grade. Confirm the requested finish, tolerances and certificate for this specific coil before quoting.
Typical applications
Food processing equipment, general fabrication, tanks and architectural applications. Engineering selection must account for the actual fluid, temperature, environment and code.
Related products
- SS 304 Sheets
- SS 316 Sheets
- SS 304 Plates
- SS 316 Plates