We are Riddhi Siddhi Impex, a Mumbai-based manufacturer and supplier of Stainless Steel 904L Strips, established in 2002. We slit UNS N08904 super austenitic strip to ASTM A240 / ASME SA-240 in gauges of 0.03 mm to 5 mm. Our ISO 9001, 14001, and 45001-certified company keeps a ready stock and a monthly supply capacity of 400-500 tonnes, with EN 10204 Type 3.1 / 3.2 mill test certificates on request.
904L Stainless Steel strips are narrow, flat-rolled lengths of a super austenitic grade alloyed with 23 to 28% nickel, 19 to 23% chromium, 4 to 5% molybdenum, and 1 to 2% copper. Metallurgists bred 904L for dilute sulphuric acid duty, the service that peels the passive film off ordinary austenitics. High molybdenum holds chloride pitting at bay, and the structure stays non-magnetic and ductile down to thin gauge. These stainless steel strips are used in heat exchangers and the pharmaceutical industry.
As a reliable 904L stainless steel strip manufacturer and supplier, every strip we sell is slit in-house from parent coils sourced from reputed primary mills. Gauges run 0.03 mm to 5 mm and widths from 3 mm to 2000 mm, always solution annealed, with four finishes and four edge types. Test papers accompany the dispatch on request.
We provide ASTM A240 904L strips in annealed condition only, with four surface finishes, four edge options, and hot rolled or cold rolled routes.
| Parameter | Details |
|---|---|
| Standard | ASTM A240 / ASME SA-240 |
| Thickness | 0.03 mm to 5 mm |
| Width | 3 mm to 2000 mm |
| Width Tolerance | ±0.1 mm |
| Condition | Annealed (Soft) |
| Surface Finish | BA (Bright Annealed), 2B, Matte, Matte PVC |
| Supply Forms | Hot rolled (HR), Cold rolled (CR) |
| Edge | Slit edge, Mill edge, Deburred edge, Round edge |
Nickel at 23 to 28% stabilises the austenite in reducing acids, while the 1.0 to 2.0% copper addition lets UNS N08904 strip repassivate in dilute sulphuric solutions that activate 316L. Carbon capped at 0.020% protects weld seams.
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.020 max |
| Manganese (Mn) | 2.00 max |
| Phosphorus (P) | 0.045 max |
| Sulphur (S) | 0.035 max |
| Silicon (Si) | 1.00 max |
| Chromium (Cr) | 19.0 - 23.0 |
| Nickel (Ni) | 23.0 - 28.0 |
| Molybdenum (Mo) | 4.0 - 5.0 |
| Copper (Cu) | 1.0 - 2.0 |
| Nitrogen (N) | 0.10 max |
Annealed ASTM A240 904L strip delivers 490 MPa minimum tensile strength with 35% elongation, so it forms into tubes, bands, and pressings without cracking. The grade takes no temper ladder; we ship it solution annealed only, and values at foil-thin gauges are indicative.
| Property | Value |
|---|---|
|
Tensile Strength, minimum
|
490 MPa (71 ksi) |
|
Yield Strength (0.2% offset), minimum
|
220 MPa (31 ksi) |
|
Elongation in 50 mm, minimum
|
35% |
|
Hardness, maximum
|
90 HRB |
Buyers ordering to a regional standard, or to the European trade name Inox 904L, can match our Alloy 904L strips against the designations below. Each names one copper-bearing 25Ni-4.5Mo super austenitic stainless steel.
| Country / Standard | Designation |
|---|---|
| USA (UNS) | N08904 |
| Europe (EN) | X1NiCrMoCu25-20-5 |
| Germany (W.Nr) | 1.4539 |
| Japan (JIS) | SUS890L |
| Sweden (SS) | 2562 |
These 5 industries specify most of the 904L SS strips we slit. Acid and chloride resistance drive every selection.
Sulphuric and phosphoric acid plants form 904L stainless steel slitting coil into dip pipes, mixer bands, vessel linings, and instrument brackets. Wet-process phosphoric acid carries chlorides and fluorides that pit 316L within months; the copper-nickel chemistry keeps this strip passive between turnarounds.
Tube mills roll our 1.4539 strip into longitudinally welded tubing for seawater condensers, acid coolers, and feedwater heaters. Slit width held to ±0.1 mm keeps weld lines straight, and 0.020% max carbon leaves seams free of sensitisation.
Equipment builders press 904L stainless steel coil strips into hygienic clamps, bands, and dosing components that meet clean-in-place chemicals every shift. The material sheds no corrosion products into the batch and tolerates hot caustic and chloride wash cycles.
Bleach plants and FGD scrubbers pass hot, acidic, chloride-loaded liquor through washers, ducting, and absorber internals. Fabricators choose 904L strip because it outlasts leaner grades through hypochlorite and chlorine dioxide stages without paying for a 6Mo alloy.
Desalination plants and shipboard systems take Alloy 904L strip for brine heater parts, seawater piping clips, and fastener stock. Resistance to chloride stress corrosion cracking lets thin cold-formed sections carry load in warm seawater where 304 and 316 crack.
Consignments leave from Mumbai and Taloja in wooden cases or on pallets.
| Parameter | Details |
|---|---|
| Packaging | Wooden cases, pallet packing |
| Incoterms | FOB, CIF, CFR, EXW Mumbai |
| Dispatch Points | Mumbai and Taloja warehouses |
| Standard Lead Time | 4 to 5 days |
| Urgent Dispatch | 2 to 3 days |
| Payment Terms | Advance, credit, LC |
| Certification | EN 10204 Type 3.1 / 3.2 on request |
Stainless Steel 904L Strips price in India ranges from ₹800-₹1,300 per kg, or $4.0-5.9 per kg for export orders. Rates track nickel, molybdenum, and copper markets; thickness, width, finish, and volume move the final figure. Treat the range as indicative and call or WhatsApp us for today's rate.
The price of SS 904L strips per kg is around ₹800-₹1,300 in India, roughly $8-14 for export buyers. Nickel rates shift monthly, so send your exact specification for a firm quote.
904L Stainless Steel Winding Strips are not magnetic. High nickel keeps the structure fully austenitic, and it picks up no meaningful magnetism during cold rolling.
Stainless Steel 904L Strips weld cleanly by TIG and MIG without preheat or post-weld treatment. Carbon held to 0.020% max prevents sensitisation, so welded seams keep their acid resistance.
We supply 904L strips in solution annealed condition only. The grade carries no hard temper ladder.
904L strip differs from 316L strip in nickel (23-28% against 10-14%), molybdenum (4-5% against 2-3%), and a copper addition that 316L lacks, which is why acid plants pay its premium.
You can source Stainless Steel 904L Strips in India from us at Riddhi Siddhi Impex, your supplier, stockist, and exporter. Our Mumbai and Taloja warehouses hold UNS N08904 strip for dispatch in 4 to 5 days. Call or WhatsApp us and get a quote within 24 hours.
