| Specifications | Astm, Asme, Din, Nfa, Jis |
|---|---|
| Thickness | 4.0mm, 100mm |
| Pipes Size | 1/8” Nb, 1/4” Od, 24” Nb, 24” Od Sizes |
| Tubes Size | 1/2″ Od, 8″ Od |
| Length: | Single Random, Cut Length, Double Random, Fix Length, Required Length |
| End | Plain End, Beveled End, Threaded |
Super Duplex Seamless Pipe Manufacturer in India
Sagar Steel Corporation is a reliable super duplex seamless pipes manufacturer, a manufacturer of high-performance piping solutions, such as solutions that are high performing even in extreme operating conditions. These pipes combine the ferritic stainless steel strength with the austenitic grade corrosion resistance, which offers great resistance to pitting, crevice and stress corrosion cracking. They are quite prevalent in offshore platforms, desalination plants and chemical processing units and high-pressure industrial systems where the reliability and longevity are paramount. Our duplex seamless pipes also offer additional support to industrial needs.
Super Duplex Stainless Steel Seamless Pipe - Information Table
Category | Details |
Material family | Super Duplex Stainless Steel (SDSS) |
Microstructure | Duplex (Ferrite + Austenite), typically ~50/50 balance after solution anneal |
Most common grades | 2507 (UNS S32750 / EN 1.4410), Zeron 100-type (UNS S32760 / EN 1.4501) |
Key advantage | Very high strength + excellent pitting/crevice corrosion and chloride SCC resistance vs austenitic grades (304/316/904L) |
Typical pipe standards | ASTM A790 / ASME SA790 (Duplex stainless steel seamless & welded pipe) |
Typical tube standards (if needed) | ASTM A789 / ASME SA789 (Duplex seamless & welded tubes for general service) |
Common size range (typical supply) | NPS 1/8" to 24" (seamless availability depends on mill); larger sizes often welded/EFW |
Wall thickness / schedule | SCH 10 / 40 / 80 and project-specific thickness as required |
Supply condition | Solution annealed + water quenched, pickled & passivated (typical) |
Typical chemical composition (S32750 / 2507) wt% | C ≤ 0.03, Mn ≤ 1.20, Si ≤ 0.80, P ≤ 0.035, S ≤ 0.020, Cr 24–26, Ni 6–8, Mo 3–5, N 0.24–0.32(typical industry ranges; confirm with MTC) |
Typical chemical composition (S32760) wt% | C ≤ 0.03, Cr 24–26, Ni 6–8, Mo 3–4, W ~0.5–1.0, N 0.20–0.30, Cu ~0.5–1.0(varies by spec/producer; confirm with MTC) |
PREN (pitting resistance, typical) | S32750: ~40–45; S32760: often higher due to W/Cu additions (depends on exact chemistry) |
Mechanical properties (typical, room temp) | Very high strength: Yield commonly ~550 MPa min, Tensile ~750–900 MPa (varies by standard/thickness); elongation typically ≥ 15–25% |
Density | ~7.8 g/cm³ |
Service performance (high level) | Excellent in chloride-bearing seawater/brines, strong crevice/pitting resistance, improved chloride SCC resistance vs austenitics |
Typical applications | Offshore & marine piping, desalination, heat exchangers, chemical processing, oil & gas (topsides/subsea), pulp & paper, FGD/pollution control |
Welding & fabrication (important) | Use qualified WPS; control heat input & interpass, maintain duplex balance, use matching duplex fillers, avoid sigma/secondary phase formation; post-weld pickling/passivation recommended |
Heat treatment note | Avoid long exposure in ~600–1000°C range (risk of embrittling phases); solution anneal if required by procedure |
QA / documentation | MTC (EN 10204 3.1/3.2), PMI on request, hydrotest + NDT as per ASTM/ASME and project ITP |
We have in place our super duplex seamless pipes that are relied on in the B2B industries and that enable them to use them in bulk procurement, and are also easily incorporated in large projects. They are available in exact diameters, wall thicknesses, and tailor-made lengths, which are of good mechanical strength, weldable, and have internal finishes to maximise fluid flow. They are designed to withstand the standards of other international standards like ASTM A790 and are best suited to petrochemical plants, heat exchangers, and refinery operations, where corrosive and high-pressure pressure are quite critical. These pipes guarantee high-performance load and efficient operation over the long term, and a decrease in maintenance of critical applications with excellent quality control, delivery on time, and scalability.
Type of Sub-products
S32750 Super Duplex Seamless Pipe S32750 Super Duplex Seamless Pipe
High-strength pipe with superior corrosion resistance for offshore and subsea operations.
S32760 Super Duplex Seamless Pipe S32760 Super Duplex Seamless Pipe
Built for aggressive environments, ensuring stability and durability in chemical and marine applications.