We are Riddhi Siddhi Impex, a Mumbai-based supplier and stockist of Super Duplex Steel S32750 coils, established in 2002. As an ISO 9001, 14001, and 45001 certified company, we hold ready coil stock to ASTM A240 / ASME SA-240 with a width slit to ±0.1 mm tolerance and export to 60+ countries. Supply capacity is 400-500 tons monthly, with EN 10204 Type 3.1 / 3.2 certificates on request.
Super Duplex Steel S32750 coils are flat-rolled duplex stainless steel supplied in continuous wound form, built on a microstructure split roughly 50/50 between austenite and ferrite. Chromium is 24 to 26%, molybdenum is 3 to 5%, and nitrogen is between 0.24 and 0.32%. Together, they push the PREN past 40, the line that separates super duplex from standard duplex. The grade is selected for hot chloride environments where 316L and even Duplex 2205 no longer provide sufficient corrosion resistance. Super Duplex Steel S32750 coils are typically used for high-chloride environments like offshore oil and desalination piping.
We stock UNS S32750 coils rather than roll super duplex steel coils, drawing source coils from reputed primary mills and slitting in-house to ±0.1 mm. Material ships solution annealed to ASTM A240, hot rolled or cold rolled, from 0.03 mm to 5 mm thick, with mill test certificates on request.
We provide ASTM A240 S32750 coils in solution annealed condition, with two surface finishes, three edge options, and precision slitting to the width your line needs.
| Parameter | Details |
|---|---|
| Standard | ASTM A240 / ASME SA-240 |
| Thickness | 0.03 mm to 5 mm |
| Width | Up to 2000 mm (post-slit) |
| Width Tolerance | ±0.1 mm |
| Coil ID | 150 mm to 610 mm |
| Coil OD | Up to 1800 mm |
| Condition | Solution annealed |
| Surface Finish | 2B, BA (Bright Annealed) |
| Supply Forms | Hot rolled and Cold rolled |
| Edge | Mill edge, Slit edge, Deburred edge |
Chromium at 24.0 to 26.0% anchors the passive film on UNS S32750 coils, while molybdenum and nitrogen lift the PREN beyond 40. ASTM A240 limits appear below.
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.030 max |
| Manganese (Mn) | 1.20 max |
| Phosphorus (P) | 0.035 max |
| Sulphur (S) | 0.020 max |
| Silicon (Si) | 0.80 max |
| Chromium (Cr) | 24.0 to 26.0 |
| Nickel (Ni) | 6.0 to 8.0 |
| Molybdenum (Mo) | 3.0 to 5.0 |
| Copper (Cu) | 0.50 max |
| Nitrogen (N) | 0.24 to 0.32 |
A 795 MPa minimum tensile strength defines ASTM A240 S32750 coil, backed by a 550 MPa yield. Coils ship solution annealed only. Continuous service is generally limited to about 250 °C because prolonged exposure at intermediate temperatures can lead to embrittlement, particularly near 475 °C.
| Property | Value |
|---|---|
|
Tensile Strength, minimum
|
795 MPa (116 ksi) |
|
Yield Strength (0.2% offset), minimum
|
550 MPa (80 ksi) |
|
Elongation in 50 mm, minimum
|
15% |
|
Hardness, maximum
|
310 HBW / 32 HRC |
International buyers can match SAF 2507 coils to their regional standard using the table below. Each designation covers the same 25Cr super duplex chemistry.
| Country / Standard | Designation |
|---|---|
| USA (UNS) | S32750 |
| Europe (EN) | X2CrNiMoN25-7-4 |
| Germany (W.Nr) | 1.4410 |
| Japan (JIS) | SUS329J4L |
| China (GB) | 022Cr25Ni7Mo4N |
| France (AFNOR) | Z3CND25-06Az |
| Sweden (SS) | 2328 |
These 5 industries widely use the Super Duplex 2507 coils, specifying the grade where chloride attack and mechanical load arrive together and standard duplex falls short.
Offshore fabricators feed Alloy 2507 coils into welded tubing, control-line sheathing, and clamp components for topside and subsea duty. Seawater and sour streams attack lesser grades quickly. The 795 MPa tensile strength lets designers trim section thickness where platform weight carries a cost.
Process plants convert UNS S32750 coils into heat exchanger components, column internals, and lining material for streams that mix chlorides with organic acids. The chromium-rich chemistry keeps a corrosion allowance in service where Duplex 2205 is at its limit.
Hot concentrated brine is one of the harshest environments for stainless steels. Desalination contractors roll 2507 super duplex coils into evaporator linings, flash chamber panels, and reverse osmosis hardware because a PREN above 40 holds off crevice attacks at gaskets and weld seams.
Bleach plants combine chlorides, acidity, and temperature. Coil-fed parts for washer drums, digester internals, and liquor piping specify 25Cr super duplex material because it outlasts standard duplex in chlorine dioxide environments while carrying continuous mechanical load.
Shipyards and port equipment builders form S32750 SDSS coils into splash-zone brackets, seawater system components, and fastener stock. Warm seawater falls well within the grade's corrosion-resistance range, and the high yield strength means parts carry load at reduced weight on vessels and port structures.
As a Super Duplex S32750 coils exporter, we pack every consignment for sea freight worldwide.
| 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 |
Super Duplex Steel S32750 coils price in India is roughly ₹650 to ₹900 per kg, while export prices are generally around $8 to $11 per kg, depending on thickness, finish, and order quantity. Nickel and molybdenum markets move these figures, along with thickness and quantity, so Call or WhatsApp us for today's rate.
We supply Super Duplex Steel S32750 Coils from 0.03 mm to 5 mm thick and up to 2000 mm (post-slit) wide, slit to ±0.1 mm tolerance. Coil ID spans 150 mm to 610 mm, with OD up to 1800 mm.
The difference between S32750 coils and S32760 coils lies in chemistry. S32750 relies on 3.0 to 5.0% molybdenum with 0.24 to 0.32% nitrogen, while S32760 adds tungsten and copper to reach a similar PREN above 40. S32750 is more widely stocked.
Super Duplex 2507 coils hold the edge over Duplex 2205 coils in the numbers that decide selection. PREN exceeds 40 against about 35, and the minimum tensile strength reaches 795 MPa against 655 MPa. Choose 2507 when hot chlorides take 2205 past its limit.
Yes, we provide EN 10204 Type 3.1 / 3.2 mill test certificates with SAF 2507 coils on request, confirming ASTM A240 chemistry and mechanical values.
You can source Super Duplex Steel S32750 Coils in India from us at Riddhi Siddhi Impex. Our Mumbai and Taloja warehouses hold 1.4410 coil stock ready for dispatch in 4 to 5 days, or 2 to 3 days for urgent needs. Phone or WhatsApp us, and we will provide quotes within 24 hrs.
