Super Duplex Steel Pipes Manufacturer & Exporter
Leoscor Alloys Pipes stocks super duplex pipe in Mumbai India in two grades — UNS S32750 (commonly sold as SAF 2507) and UNS S32760 (commonly sold as Zeron 100). Both are ASTM A789/A790 material, held in sizes from NPS 1/2″ to 24″, and both ship with an EN 10204 3.1 mill test certificate and traceable heat number.
Super duplex is what you specify when standard 2205 duplex starts pitting. The extra chromium, molybdenum and nitrogen push the pitting resistance equivalent number up to around 42 to 44, against 34 to 36 for 2205. That jump matters in hot seawater, brine concentration units and any stagnant chloride pocket where 2205 would eventually fail.
S32750 and S32760 are close cousins, not identical twins. S32760 adds tungsten and copper to the base composition, which some mills claim gives it a slight edge in specific reducing-acid and seawater conditions. In practice, for most oil and gas and desalination work, either grade performs the job and availability often decides which one you end up with.
To check current stock in your required grade and size, send us a query.
OUR RANGE OF SUPER DUPLEX STEEL PIPES
Super Duplex Steel Pipes
Why Buy Stainless Steel Pipes from Leoscor Alloy Pipes
Leoscor Alloy Pipes is a trusted stockist, distributor, and supplier of Super Duplex Steel Pipes from India, with decades of experience serving global industries. Our focus on quality, reliable supply, and customer satisfaction ensures dependable piping solutions.
Key advantages of choosing us:
- Extensive inventory of standard sizes and grades
- Reliable sourcing from reputed manufacturers
- Strict quality control and experienced professionals
- Strong logistics and timely delivery support
- Modern infrastructure with large storage capacity
- ISO 9001:2015 certified company
Contact us – info@leoscoralloypipes.com
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What we hold in stock
| Specifications | Details |
|---|---|
| Standards | ASTM A789 (welded), A790 (seamless), and matching ASME SA specifications |
| Grades | UNS S32750 (SAF 2507), UNS S32760 (Zeron 100 / EN 1.4501) |
| Size Range | NPS 1/2″ to 24″ (15 mm to 600 mm NB) |
| Schedules | SCH 10S, 40S, 80S, and standard/heavy wall per ASME B36.10M |
| Forms | Seamless, Welded, ERW, EFW |
| Shapes | Round (standard stock); square, rectangular and oval on request |
| Lengths | Single Random (5 to 7 m), Double Random (8 to 13 m), Cut to Length |
| Certification | EN 10204 3.1 as Standard, 3.2 on Request |
S32750 or S32760 — which one do you need
Both grades meet ASTM A789/A790 with a minimum yield of 550 MPa. The chemistry difference is small but worth knowing before you commit to a mill order.
| Grade | Trade Name | PREN (approx.) | Distinguishing feature |
|---|---|---|---|
| UNS S32750 | SAF 2507 | 42 to 43 | The more widely stocked super duplex grade, no tungsten or copper addition. |
| UNS S32760 | Zeron 100 | 40 to 41 | Tungsten and copper added, marketed for improved performance in some reducing acid and seawater conditions. |
If you have no specific mill or client preference, tell us the fluid and temperature and we will quote whichever grade we have in stock in your size.
Sizes and wall thicknesses
Dimensions follow ASME B36.10M, same as duplex 2205. Density for both super duplex grades is close to 7.80 g/cm³: kg per metre = (OD minus WT) x WT x 0.0246, both dimensions in mm.
| NPS | OD (mm) | SCH 10S | SCH 40 | SCH 80 |
|---|---|---|---|---|
| 1/2″ | 21.3 | 2.11 | 2.77 | 3.73 |
| 2″ | 60.3 | 2.77 | 3.91 | 5.54 |
| 4″ | 114.3 | 3.05 | 6.02 | 8.56 |
| 6″ | 168.3 | 3.40 | 7.11 | 10.97 |
| 8″ | 219.1 | 3.76 | 8.18 | 12.70 |