We are Riddhi Siddhi Impex, a Mumbai-based manufacturer and supplier of SMO 254 Strips, established in 2002. Our plant slits this super austenitic 6Mo stainless steel to ASTM A240 / ASME SA-240 in gauges from 0.03 mm to 5 mm. Being an ISO 9001, 14001, and 45001 certified company, we keep ready stock and provide EN 10204 Type 3.1 / 3.2 certificates on request.
SMO 254 strip is a flat-rolled super austenitic stainless steel product built on roughly 20% chromium, 18% nickel, 6% molybdenum, copper, and 0.2% nitrogen. That chemistry lifts the pitting resistance equivalent number above 40, so warm seawater and acidic chloride streams that perforate 316L leave the passive film intact. Nitrogen also lifts yield strength to about 1.5 times that of standard austenitics like 304, enhancing the structural integrity of these super austenitic stainless steel strips. Typical uses of SMO 254 strip include desalination plants, marine piping, flue-gas desulfurization scrubbers, and pulp bleaching equipment.
As a reliable SMO 254 Strips Supplier, every 254 SMO Stainless Steel Winding Strip we provide passes through our own slitting lines rather than arriving pre-cut from a mill. We slit any width between 3 mm and 2000 mm, hold the material annealed to ASTM A240, and finish it in BA, 2B, and Matte surfaces with slit, deburred, or round edges.
We provide ASTM A240 S31254 strips in annealed soft condition, cold rolled and precision slit in-house, with three surface finishes and four edge options, supplied in coils.
| Parameter | Details |
|---|---|
| Standard | ASTM A240 / ASME SA-240, ASTM A480 |
| 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 |
| Edge | Slit edge, Mill edge, Deburred edge, Round edge |
Chromium anchors the analysis at 19.50 to 20.50%, but molybdenum earns the 6Mo name, holding the PREN above 40 alongside 0.180 to 0.220% nitrogen. ASTM A240 limits appear below.
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.020 max |
| Manganese (Mn) | 1.00 max |
| Phosphorus (P) | 0.030 max |
| Sulphur (S) | 0.010 max |
| Silicon (Si) | 0.80 max |
| Chromium (Cr) | 19.50 to 20.50 |
| Nickel (Ni) | 17.50 to 18.50 |
| Molybdenum (Mo) | 6.00 to 6.50 |
| Copper (Cu) | 0.50 to 1.00 |
| Nitrogen (N) | 0.180 to 0.220 |
Annealed SA-240 S31254 strips pair 690 MPa minimum tensile strength with a 310 MPa yield floor, about 1.5 times of 304. We ship soft only; A240 assigns no temper ladder. Below 0.50 mm, yield values stay indicative.
| Property | Value (Annealed) |
|---|---|
|
Tensile Strength, minimum
|
690 MPa (100 ksi) |
|
Yield Strength (0.2% offset), minimum
|
310 MPa (45 ksi) |
|
Elongation in 50 mm, minimum
|
35% |
Buyers ordering against a European or Japanese specification can match 254 SMO strips to their home designation below. The EN 1.4547 strips in our stock answer every listing.
| Country / Standard | Designation |
|---|---|
| USA (UNS) | S31254 |
| Europe (EN) | X1CrNiMoCuN20-18-7 |
| Germany (W.Nr) | 1.4547 |
| Japan (JIS) | SUS312L |
| France (AFNOR) | Z1 CNDU 20-18-06 Az |
| Sweden (SIS) | SS 2378 |
These 4 industries specify most of the 6Mo strips leaving our slitting lines. Each buyer rolls, presses, or winds the material into a component that must then survive chloride service.
Tube mills roll SMO 254 strips into longitudinally welded tube for seawater intake, firewater, and desalination piping. Consistent gauge across the coil keeps the weld seam uniform. With a PREN above 40, both parent metal and weld zone resist pitting in hot, high-chloride brine.
Heat exchanger builders press 254 SMO strip into corrugated plates and wind it into fin stock for coolers handling brackish or salt water. Thin gauges down to 0.03 mm form cleanly. Nitrogen-strengthened austenite lets designers carry the same pressure with less wall thickness than 316L needs.
Bellows manufacturers convert UNS S31254 strip into multi-ply expansion joints for flue ducts and chemical piping. The grade takes deep convolutions without tearing and resists chloride stress corrosion cracking, so finished joints flex through years of thermal cycles.
Power stations form Alloy 254 strips into scrubber components, mist eliminator blades, and damper seals for FGD ducting. Condensate in these systems runs acidic and chloride-heavy. The 6% molybdenum content keeps formed super austenitic stainless steel strips passive, whereas a leaner grade would pit within one campaign.
As an SMO 254 strips exporter, we dispatch from Mumbai and Taloja in wooden crates 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 |
SMO 254 strips price in India is around ₹900 to ₹1,450 per kg, near $9.5 to $15.5 for export buyers. Treat the band as indicative; it tracks nickel and molybdenum surcharges. Thickness, width, finish, and quantity settle the final figure, so call or WhatsApp us for today's rate.
We slit SMO 254 strips from 0.03 mm to 5 mm thick and to any width between 3 mm and 2000 mm, holding ±0.1 mm on width.
SMO 254 strips can be rolled and welded into tube; mills take our slit coil directly. Uniform gauge and clean edges keep the longitudinal seam consistent.
254SMO strips leave our works annealed and soft only. No temper ladder applies under ASTM A240; hard tempers belong to SS 301 and SS 304 strips.
The finishes we offer on Alloy 254 strips are BA (Bright Annealed), 2B, and Matte, paired with slit, mill, deburred, or round edges.
We provide EN 10204 Type 3.1 and 3.2 mill test certificates with S31254 strips on request, covering chemistry and mechanicals traceable to the source coil.
You can buy SMO 254 strips in India from us at Riddhi Siddhi Impex. Our Mumbai warehouse holds UNS S31254 strip stock for dispatch in 4 to 5 days. As a manufacturer, stockist, and distributor, we serve buyers across India and export overseas. WhatsApp us; quotes will be provided within 24 hours.
