Super Duplex Steel UNS S32750 Pipes Manufacturer & Supplier
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Super Duplex Steel UNS S32750 Pipes are high-performance duplex stainless steel pipes built to withstand corrosion, high pressure, and demanding environments. Known as SAF 2507, this alloy blends austenite and ferrite structures, providing better strength and resistance than standard duplex grades. Midland Alloys Inc is a leading ASTM A790 S32750 pipe manufacturer, offering seamless, welded, and custom-made options. These pipes are available in a range of sizes and surface finishes. As a reputable SAF 2507 pipe supplier, we adhere to global standards such as ASTM A790 / ASME SA790. Our duplex 2507 seamless and welded pipes are suitable for offshore rigs, chemical plants, or onshore systems .
What Is Super Duplex Steel UNS S32750?
Super Duplex Steel UNS S32750 is a tough, high-grade stainless steel made for harsh conditions. This saf 2507 dual-phase alloy fights off chloride stress corrosion, pitting, and crevice corrosion better than most steels. It has higher levels of chromium, molybdenum, nickel, and nitrogen that enhance its performance. UNS S32750 stainless steel offers twice the strength of regular 300-series stainless steels. It comes under the ASTM A790 super duplex material standard which make it reliable for demanding environments.
Key Strengths of UNS S32750 Pipes
- Resistant to pitting and crevice corrosion, even in salty or harsh conditions.
- The dual-phase structure enhances fatigue strength and crack resistance.
- Can withstand pressure cycles and aggressive media without breaking.
- Low thermal expansion improves weld integrity and pipe alignment.
- A stable microstructure ensure long term performance under stress.
- Easy to fabricate with tight tolerance control in complex assemblies.
- Super duplex S32750 pipe strengths lead to longer service life and fewer shutdowns.
S32750 vs S32205 – Grade Difference Explained
Technical Specifications of ASTM A790 UNS S32750 Pipes
Seamless Pipe OD : ½″ NB – 16″ NB
Welded Pipe OD : ½″ NB – 24″ NB
EFW Pipe Size : 6″ NB – 24″ NB
ASTM A790 ASME SA790
Seamless, ERW, Welded, Fabricated
Round, Square, Rectangular, Hydraulic Etc
Single Random, Double Random & Cut Length.
Plain End, Beveled End, Treaded
SCH5, SCH10, SCH20, SCH30, SCH40, STD, SCH80, SCH 80S, SCH60, SCH80, SCH120, SCH140, SCH160, SCH XXS, SCH XS
No. 2B – Mill finish / Matte finish, No. 4 – Brushed finish, No. 8 – Mirror finish, Bright Annealed – Smooth / Slightly reflective, Polished – Smooth / Enhanced corrosion resistance,Mirror – Highly reflective,
Types of Super Duplex 2507 Pipes:
Manufacturing Types
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Seamless PipeMade without welds for a smooth, uniform body.
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Welded PipeFormed by welding steel plates or strips along the length.
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ERW PipeUses electric current to join edges together.
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EFW PipeWelded with an electric arc, typically for larger sizes.
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Custom/FabricatedMade to special shapes or project specifications.
Pipe Forms
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Round Pipe S32750Most common shape used in pipelines.
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Square Pipe S32750Used for flat surfaces or tighter corners.
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Rectangular PipeIdeal for frame and structure-based applications.
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U-bendPre-bent for use in compact or looped systems.
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Hydraulic PipeDesigned for high-pressure fluid flow.
We manufacture all UNS S32750 seamless and welded pipes or shaped variants for different projects.
Contact us today to discuss how Super Duplex UNS S32750 Steel Pipes can benefit your application. Whether you need guidance in selecting the right pipes or have specific requirements, our team of experts is here to help you find the optimal solution.
Technical Details & Delivery Condition
UNS S32750, also called SAF 2507, has a high mix of chromium, molybdenum, and nitrogen. This composition makes it resistant against pitting, crevice corrosion, and other localized damage in chloride-heavy environments.
| Grade | C (Max) | Mn (Max) | P (Max) | S (Max) | Si (Max) | Cr | Ni | Mo | N | Fe | Cu | Other |
| Super Duplex 2507 | 0.030 | 1.20 | 0.035 | 0.020 | 0.80 | 24.0–26.0 | 6.0–8.0 | 3.0–5.0 | 0.24–0.32 | Bal. | 0.50 | – |
The mechanical properties of UNS S32750 make it ideal for high-pressure and structural loads. S32750 yield and elongation values are given below to know pipe ability to handle heat, pressure, and corrosive exposure.
| Alloy | UNS Designation | Specification | Tensile Strength (psi) | Tensile Strength (MPa) | Tensile Strength (ksi) | Yield Strength (psi) | Yield Strength (MPa) | Yield Strength (ksi) | Elongation in 2 in. (min %) | Grain Size Req. | Max. Hardness | Modulus of Elasticity (x10⁶ psi) | Thermal Expansion (in/in/°F x10⁻⁶) | Thermal Conductivity (BTU-in/ft²-h-°F) |
| 2507 | S32750 | A789, A790 | 116,000 | 800 | 116 | 80,000 | 550 | 80 | 15 | – | 32 Rc | 27.5 | 7.2 | – |
Super Duplex S32750 is listed in numerous international standards for a variety of industries. When working with different regional or project specifications, these equivalents make it easier to identify matching materials.
| Alloy | UNS Designation | Werkstoff Nr. | Specifications | AFNOR | Grade | DIN | EN | SS |
| 2507 | S32750 | 1.4410 | A/SA789, A/SA790 | Z3 CN 25.06 Az | F53 | X 2 Cr Ni MoN 25.7.4 | 1.4410 | 2328 |
Duplex & Super Duplex Steel Pipes Grades We Offer
Super Duplex UNS S32750 Steel Pipe Schedule
| Nominal | O.D. Inches | 10s | 10 | 40s & Std | 40 | 80s & E.H. | 80 | 160 |
| 1/8 | .405 | .049 | .049 | .068 | .068 | .095 | .095 | |
| 1/4 | .540 | .065 | .065 | .088 | .088 | .119 | .119 | |
| 3/8 | .675 | .065 | .065 | .091 | .091 | .126 | .126 | |
| 1/2 | .840 | .083 | .083 | .109 | .109 | .147 | .147 | .187 |
| 3/4 | 1.050 | .083 | .083 | .113 | .113 | .154 | .154 | .218 |
| 1 | 1.315 | .109 | .109 | .133 | .133 | .179 | .179 | .250 |
| 1 1/4 | 1.660 | .109 | .109 | .140 | .140 | .191 | .191 | .250 |
| 1 1/2 | 1.900 | .109 | .109 | .145 | .145 | .200 | .200 | .281 |
| 2 | 2.375 | .109 | .109 | .154 | .154 | .218 | .218 | .343 |
| 2 1/2 | 2.875 | .120 | .120 | .203 | .203 | .276 | .276 | .375 |
| 3 | 3.500 | .120 | .120 | .216 | .216 | .300 | .300 | .437 |
| 3 1/2 | 4.000 | .120 | .120 | .226 | .226 | .318 | .318 | |
| 4 | 4.500 | .120 | .120 | .237 | .237 | .337 | .337 | .531 |
| 4 1/2 | 5.000 | .247 | .355 | |||||
| 5 | 5.563 | .134 | .134 | .258 | .258 | .375 | .375 | .625 |
| 6 | 6.625 | .134 | .134 | .280 | .280 | .432 | .432 | .718 |
| 7 | 7.625 | .301 | .500 | |||||
| 8 | 8.625 | .148 | .148 | .322 | .322 | .500 | .500 | .906 |
| 9 | 9.625 | .342 | .500 | |||||
| 10 | 10.750 | .165 | .165 | .365 | .365 | .500 | .593 | 1.125 |
| 11 | 11.750 | .375 | .500 | |||||
| 12 | 12.750 | .180 | .180 | .375 | .406 | .500 | .687 | 1.312 |
| 14 | 14.000 | .188 | .250 | .375 | .437 | .500 | .750 | 1.406 |
| 16 | 16.000 | .188 | .250 | .375 | .500 | .500 | .843 | 1.593 |
| 18 | 18.000 | .188 | .250 | .375 | .562 | .500 | .937 | 1.781 |
Super Duplex UNS S32750 Steel Pipe Weight Chart
| Pipe OD mm | Pipe WT mm | Nominal Size | Weight, kg/m |
|---|---|---|---|
| 21.34 | 2.11 | 1/2″ 10S | 1.02 |
| 21.34 | 2.77 | 1/2″ 40S | 1.29 |
| 26.67 | 2.11 | 3/4″ 10S | 1.30 |
| 26.67 | 2.87 | 3/4″ 40S | 1.71 |
| 33.40 | 1.65 | 1″ 5S | 1.31 |
| 33.40 | 2.77 | 1″ 10S | 2.13 |
| 33.40 | 3.38 | 1″ 40S | 2.54 |
| 42.16 | 1.65 | 1 1/4″ 5S | 1.67 |
| 42.16 | 2.77 | 1 1/4″ 10S | 2.73 |
| 42.16 | 3.56 | 1 1/4″ 40S | 3.44 |
| 48.26 | 1.65 | 1 1/2″ 5S | 1.92 |
| 48.26 | 2.77 | 1 1/2″ 10S | 3.16 |
| 48.26 | 3.68 | 1 1/2″ 40S | 5.49 |
| 60.33 | 1.65 | 2″ 5S | 2.42 |
| 60.33 | 2.77 | 2″ 10S | 3.99 |
| 60.33 | 3.91 | 2″ 40S | 5.52 |
| 73 | 3.05 | 2 1/2″ 10S | 5.35 |
| 73 | 5.16 | 2 1/2″ 40S | 8.77 |
| 88.90 | 2.11 | 3″ 5S | 4.58 |
| 88.90 | 3.05 | 3″ 10S | 6.56 |
| 88.90 | 5.49 | 3″ 40S | 11.47 |
| 101.60 | 3.05 | 3 1/2″ 10S | 7.53 |
| 114.30 | 2.11 | 4″ 5S | 5.93 |
| 114.30 | 3.05 | 4″ 10S | 8.50 |
| 114.30 | 6.02 | 4″ 40S | 16.32 |
| 141.3 | 3.4 | 5″ 10S | 11.74 |
| 141.3 | 6.55 | 5″ 40S | 22.10 |
| 168.3 | 2.77 | 6″ 5S | 11.48 |
| 168.3 | 3.4 | 6″ 10S | 14.04 |
| 168.3 | 7.11 | 6″ 40S | 28.69 |
| 219.1 | 2.77 | 8″ 5S | 15.00 |
| 219.1 | 3.76 | 8″ 10S | 20.27 |
| 219.1 | 8.18 | 8″ 40S | 43.20 |
| 273 | 3.40 | 10″ 5S | 22.95 |
| 273 | 4.19 | 10″ 10S | 28.20 |
| 273 | 9.27 | 10″ 40S | 61.22 |
| 323.9 | 3.96 | 12″ 5S | 31.72 |
| 323.9 | 4.57 | 12″ 10S | 36.54 |
| 323.9 | 9.53 | 12″ 40S | 75.02 |
| 355.6 | 4.78 | 14″ 10S | 41.99 |
| 355.6 | 9.53 | 14″ STD | 82.58 |
| 406.4 | 4.78 | 16″ 10S | 48.07 |
| 406.4 | 9.53 | 16″ STD | 94.71 |
| 457.2 | 4.78 | 18″ 10S | 54.15 |
| 508.0 | 5.54 | 20″ 10S | 69.70 |
| 610.0 | 6.35 | *24″ 10S | 95.92 |
Manufacturing Process of Super Duplex Stainless Steel S32750 Pipes
The S32750 pipe manufacturing process starts with alloy billets or plates made with precise levels of chromium, molybdenum, nickel, and nitrogen. These raw materials are chosen for their stability and performance under pressure and corrosion.
For seamless pipes, the process begins with hot extrusion or rotary piercing, where the billet is pierced and formed into a rough tube. It is then cold-reduced using drawing or pilgering to reach accurate dimensions and improve surface finish. For welded pipes, duplex steel coils or plates are formed into pipe shape and welded—typically using TIG or MIG methods. Weld beads are removed with automated tools for a smooth finish. All pipes are then solution annealed to lock in the duplex structure and remove stress from forming. After that, pipes go through straightening and light calibration to meet ASTM A790 size tolerances. The finished pipes are visually inspected and undergoes testing or final surface finishing, depending on the order.
Round Bar
Analytic
Cut to Length
Centering
Heating
Perforation
Inspection of Size
Pickling
Inspection of Surface
Lubricating
Cold Drawing (Cold Rolling)
Degreasing
Annealing
Straightening
Cut
Pickling / Passivating
Inspection
Analytic
Marking
Packing & Shipping
Applications of Super Duplex Steel S32750 Pipes
Super Duplex UNS S32750 pipes are built for extreme-service environments. These pipes are used in oil and gas industry for offshore platforms and subsea pipelines. In desalination plants, they withstand seawater and high chloride levels. Petrochemical and chemical industries uses for handling aggressive fluids and high temperatures. These pipes are used in power plants as heat exchangers and condensers. In marine engineering, they support shipbuilding and ballast systems. Even pulp and paper mills use UNS S32750 pipes to deal with harsh chemicals. The uses of UNS S32750 pipes span across systems that need reliability, fewer shutdowns, and long service life.
The S32750 pipe price per kg in India usually ranges from ₹300 to ₹450, depending on several factors. Since super duplex UNS S32750 is a high-alloy grade with excellent corrosion resistance, it comes at a premium. Prices vary based on type (seamless or welded), size, wall thickness, surface finish and end type. Polished pipes, custom lengths, and third-party inspections can raise the cost. Order quantity and project location also affect the final rate. Because duplex stainless steel pipe price in India depends on raw material rates like nickel and molybdenum, pipe rates may change. Contact us directly for accurate pricing.
All Super Duplex S32750 pipes are quality checked to meet ASTM A790 / ASME SA790 standards. Each pipe is subjected to non-destructive testing, such as ultrasonic testing (UT), radiographic testing (RT), dye penetrant testing (DPT) and magnetic particle inspection (MPI). On request, mechanical tests such as tensile, hardness, flattening, and bend tests are also performed. Positive Material Identification (PMI) and spectro analysis confirm that the alloy content is accurate. We provide full super duplex 2507 pipe certifications, including Mill Test Certificates (EN 10204 3.1 / 3.2) and third-party approvals from BV, TUV, DNV, or SGS. We ensure to meet S32750 pipe testing standards, full traceability, and NORSOK, PED, and NACE MR0175 when needed.
Surface Finishes & Customization Options for Super Duplex S32750 Pipes
We provide a range of surface finishes and custom options for Super Duplex S32750 pipes to meet both industrial and visual needs. We offer standard mill finishes, pickled and passivated pipes for sensitive systems, brushed No.4 finishes for clean surface requirements, and mirror polish for aesthetic or hygienic use. As a trusted mirror polished 2507 pipe manufacturer, we also support customization needs. This includes cut to size S32750 pipes, non-standard outer or inner diameters, custom pipe ends like plain, beveled, or threaded, and U-bent pipes for heat exchanger applications. We can also fabricate based on your system. Every modification is handled in-house and follows global dimensional tolerances for precise results.
Packaging, Ready Stock & Export Support for S32750 Pipes
As a trusted super duplex 2507 pipe stockist, we keep ready stock UNS S32750 pipes in popular sizes to meet urgent project requirements. All pipes are packed using export-safe methods, such as wooden crates, bubble wrap, HDPE sleeves, or PVC-capped ends, depending on the customer’s preference. We guarantee fast shipping, support bulk orders, and provide custom packaging with pipe tags and Mill Test Certificates included. Our team regularly ships to the UAE, Saudi Arabia, Oman, Malaysia, Singapore, South Africa, Germany, and the UK. Every export follows proper clearance rules. We handle logistics—covering documentation, port delivery, and options like FOB or CIF as required.
Why Choose Midland Alloys Inc. as Your Super Duplex S32750 Pipe Supplier
FAQs – Super Duplex Stainless Steel UNS S32750 Pipes
It is used in offshore platforms, subsea pipelines, desalination plants, marine systems, and chemical processing facilities.
Yes. SAF 2507 is a popular trade name for UNS S32750.
The PREN value of UNS S32750 is usually greater than 40, indicating excellent pitting resistance.
Yes. Its high resistance to chlorides makes it ideal for seawater and marine applications.
It meets ASTM A790 and ASME SA790 standards.
S32750 pipes are available in sizes ranging from ½” NB to 24″ NB or more, with SCH 10 to SCH XXS
