Stainless Steel 904L Sheet: supplier, stockist and exporter in Mumbai, India
Rajgranth Metal & Alloys supplies stainless steel 904l sheet (UNS N08904) from Mumbai and exports it to 18 markets.
What is SS 904L sheet?
Sheet is the thinner flat product, supplied cut to size in a stated surface finish, and heavier gauges are sold as plate to the same standard and range. SS 904L sheet and plate are used for fabricated panels, equipment housings, tank shells and process equipment, where the finish and flatness matter as much as the grade. SS 904L (UNS N08904, EN 1.4539) is a super-austenitic stainless steel with 23 to 28 percent nickel, 4 to 5 percent molybdenum and added copper. The chemistry gives it far better resistance than 316L to sulphuric acid and to pitting and crevice corrosion in chlorides.
High nickel, high molybdenum, with copper. Built for sulphuric acid service.
Rajgranth Metal & Alloys lists SS 904L among the grades it supplies and exports from Mumbai.
SS 904L designations and equivalents
| Standard | Designation |
|---|---|
| UNS | N08904 |
| EN / Werkstoff | 1.4539 |
| AISI | 904L |
| Also called | 904, Alloy 904L |
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SS 904L chemical composition
Limits are those of the standard named in the table caption. Product-specific standards for pipe, tube and bar carry their own limits, so always confirm the composition on the mill test certificate supplied with the material.
| Element | Carbon | Manganese | Silicon | Phosphorus | Sulphur | Chromium | Nickel | Molybdenum | Copper | Nitrogen |
|---|---|---|---|---|---|---|---|---|---|---|
| Limit | 0.020 max | 2.00 max | 1.00 max | 0.045 max | 0.035 max | 19.00 – 23.00 | 23.00 – 28.00 | 4.00 – 5.00 | 1.00 – 2.00 | 0.10 max |
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SS 904L mechanical properties
| Property | Requirement |
|---|---|
| Tensile strength | 490 MPa minimum |
| Yield strength (0.2% offset) | 220 MPa minimum |
| Elongation in 50 mm | 35% minimum |
| Hardness | 90 HRB maximum |
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SS 904L sheet: sizes and finishes
The published size range, finishes and conditions for sheet are set out on the sheet & plate pages, which list every dimension we publish. Sizes outside the range can be produced to order; send the dimensions with your enquiry.
| Parameter | Range |
|---|---|
| Thickness | 0.3 mm, 100 mm |
| Width | 1000 mm, 1219 mm, 1500 mm, 2000 mm |
| Length | 2000 mm, 2438 mm, 3000 mm, 6000 mm |
| Form | Sheet, Plate, Coil, Circle, Flat |
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Standards for SS 904L sheet
SS 904L sheet is commonly specified to ASTM A240 / ASME SA-240 and ASTM A480. Commonly specified product standards. Confirm the standard, edition and any supplementary requirements on your order; we supply to the standard you name.
Why buyers choose SS 904L sheet
Resists sulphuric acid in moderate concentrations
Better pitting resistance than 316L
Austenitic toughness down to low temperatures
Where SS 904L sheet is used
- Sulphuric and phosphoric acid process equipment
- Seawater-cooled heat exchangers
- Flue gas desulphurisation components
- Pulp and paper bleaching plant
- Pharmaceutical process equipment
What to state when you enquire for SS 904L sheet
- Thickness in mm and sheet size, with width of 1000, 1219, 1500 or 2000 mm published
- Surface finish: 2B, BA, No. 4, hairline, mirror, matt or chequered
- Protective film on one side or both, for polished finishes
- Quantity in sheets or kilograms
- The standard and the test certificate required
- Whether sheets are to be cut to size
What to check on SS 904L sheet before and after delivery
On SS 904L sheet, look at flatness and surface in good light and at an angle, because finish defects on polished sheet show only that way. Check thickness against the order, and the heat number against the certificate. If the sheet will be formed or welded, tell us the process so we can say whether the grade and temper suit it. Grade limits to design around: lower strength than duplex grades and costs much more than 316L because of its nickel content.
Export of SS 904L sheet from India
SS 904L sheet is exported from Mumbai to 18 confirmed markets, quoted with the Incoterm and named port.
SS 904L compared with similar grades
Buyers who look at SS 904L sheet usually also compare SS 316L and 254 SMO. The grade pages below give each one's designations, properties and limits side by side so you can choose for the service rather than the price alone.
FAQ
09Questions answered
- When should I choose 904L over 316L?
- When sulphuric acid, phosphoric acid or chloride pitting makes 316L marginal, and the extra cost is justified by service life.
- Is 904L better than duplex?
- It depends on the medium. 904L resists sulphuric acid better, while duplex 2205 is stronger and costs less in chloride service.
- Is 904L magnetic?
- No. It is fully austenitic and non-magnetic when annealed.
- What finishes can SS 904L sheet be supplied in?
- The published finishes are No. 1, 2B, 2D, BA, No. 4, hairline, mirror (No. 8), matt and chequered. For polished finishes, ask for protective film.
- Which standard applies to SS 904L sheet?
- SS 904L sheet is commonly specified to ASTM A240 / ASME SA-240 and ASTM A480. Confirm the standard and edition on your order.
- What is the minimum yield and tensile strength of SS 904L?
- In the annealed condition, SS 904L has a minimum yield strength of 220 MPa and a minimum tensile strength of 490 MPa, per the standard named in the table above.
- What is the UNS number and EN designation of SS 904L?
- Stainless Steel 904L is designated UNS N08904, EN 1.4539 and AISI 904L, and is also called 904 and Alloy 904L.
- What are the main alloying elements in SS 904L?
- To the standard in the composition table, SS 904L carries chromium 19.00 – 23.00, nickel 23.00 – 28.00 and molybdenum 4.00 – 5.00 percent by weight. Confirm the composition on the mill test certificate supplied with your material.
- Do you supply a mill test certificate with SS 904L sheet?
- Yes, to EN 10204 3.1 as standard, showing chemistry and mechanical properties against the heat. EN 10204 3.2 with third-party inspection is available on request.
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