Super Duplex Pipe Fittings Manufacturer, Supplier & Exporter in India
Kalpataru Piping Solution is a Mumbai based Manufacturer, Stockist and Exporter of Super Duplex Steel Pipe Fittings. Super Duplex Pipe Fittings as defined by ASTM A815 / ASME SA815 is the choice of the demanding offshore, chemical and desalination industries. Super Duplex Alloys such as UNS S32750 (2507) and UNS S32760 have an austenite-ferrite microstructure which has nearly twice the yield strength of standard austenitic stainless steels and offers superb corrosion resistance and high stress cracking under chloride attack. They are suitable for oil and gas production and transportation. Our range of fittings is inclusive of Elbows, tees, reducers, stub ends, caps and crosses of size ½” to 48″ Nb, in seamless, welded and fabricated as per required Schedule 5s to XXs.
We also supply super duplex steel flanges and super duplex tubes to compliment our pipe fittings for a complete piping solution. Quality guaranteed, every batch is manufactured under the ISO 9001 certified system. We offer complete raw material traceability and mill test certificate along with third party inspection (upon request). For your offshore, water and chemical projects with highly corrosive environments, Kalpataru provides reliable super duplex fittings with guaranteed quality, affordable pricing and prompt delivery to over 80 countries. View the complete line up of our pipe fittings range below and send us a custom quote request.
- What is Super Duplex Pipe Fittings
- Super Duplex Pipe Fittings Types
- Super Duplex Pipe Fittings Technical Specifications
- General Specifications
- Chemical Composition
- Mechanical Properties
- Equivalent International Grades
- Applications / Industries
- Super Duplex vs Standard Duplex Steel
- Dimensions Chart
- Indicative Packing & Pricing Guide
- Export Destinations
- Manufacturing Process & Quality Assurance
- Certifications & Standards
- Super Duplex Pipe Fittings Price List
- FAQs About Super Duplex Pipe Fittings
What is Super Duplex Pipe Fittings
Explain in plain language what super duplex stainless steel is, how its roughly 50/50 austenite-ferrite microstructure gives it superior strength and corrosion resistance compared with standard duplex steel S31803/S32205 pipe fittings, and why engineers specify super duplex for offshore and high-chloride service. Reassure the reader that Kalpataru stocks ready inventory and can also custom-fabricate non-standard sizes, and cross-link to our broader steel flanges and steel tubes category pages for readers comparing product types.
Super Duplex Pipe Fittings Technical Specifications
| Parameter | Specification |
|---|---|
| Specification | ASTM A815 / ASME SA815 |
| Dimensional Standard | ASME/ANSI B16.9, ASME B16.28, MSS-SP-43 |
| Size Range | ½” NB to 48″ NB |
| Thickness | Sch 5S, 10S, 40S, 80S, 160S, XXS |
| Type | Seamless / Welded / Fabricated |
| Bending Radius | 1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom |
| End Finish | Beveled, Plain, Threaded (on request) |
Chemical Composition (Grades S32750 / S32760)
| Grade | C | Mn | Si | P | S | Cr | Ni | Mo | N | Cu | Fe |
|---|---|---|---|---|---|---|---|---|---|---|---|
| S32750 | 0.03 max | 1.20 max | 0.80 max | 0.035 max | 0.020 max | 24.0–26.0 | 6.0–8.0 | 3.0–5.0 | 0.24–0.32 | 0.5 max | 58.095 min |
| S32760 | 0.05 max | 1.00 max | 1.00 max | 0.030 max | 0.010 max | 24.0–26.0 | 6.0–8.0 | 3.0–4.0 | 0.20–0.30 | 0.50–1.00 | 57.61 min |
Super Duplex Pipe Fittings Mechanical Properties
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (Brinell) |
|---|---|---|---|---|
| S32750 | 800 | 550 | 15 | 310 |
| S32760 | 750 | 550 | 25 | 300 |
Super Duplex Pipe Fittings Equivalent International Grades
| Grade | Trade Name | UNS | Werkstoff Nr. |
|---|---|---|---|
| S32750 | Super Duplex 2507 | S32750 | 1.4410 / F53 |
| S32760 | Super Duplex Zeron 100 | S32760 | 1.4501 / F55 |
Super Duplex Pipe Fittings Types
Super Duplex Pipe Fittings Applications / Industries
- Offshore oil & gas platforms and subsea pipelines
- Desalination plants and seawater handling systems
- Chemical processing and flue gas desulfurization units
- Marine engineering and shipbuilding
- Desalination and seawater handling — often specified alongside our SMO 254 pipe fittings and copper-nickel 90/10 pipe fittings for mixed-metallurgy seawater lines.
- Power generation plants and pulp & paper industry
- For applications requiring the highest possible corrosion resistance, see our SS 904L pipe fittings, Inconel 625 pipe fittings, and Incoloy 825 pipe fittings ranges.
Comparison: Super Duplex vs Standard Duplex Steel
| Property | Super Duplex (S32750/S32760) | Standard Duplex (S31803/S32205) |
|---|---|---|
| PREN (Pitting Resistance) | ≥40 | ~35 |
| Yield Strength | 550 MPa (approx.) | 450 MPa (approx.) |
| Chromium Content | 24.0–26.0% | 21.0–23.0% |
| Molybdenum Content | 3.0–5.0% | 2.5–3.5% |
| Typical Use | Offshore, subsea, high-chloride service | General chemical & marine service |
| Relative Cost | Higher | Baseline |
Dimensions Chart — SDSS Elbows (mm)
| NPS | Center-to-End 90° (mm) | O.D. (mm) | Center-to-End 45° (mm) |
|---|---|---|---|
| 1/2 | 38 | 21.3 | 16 |
| 2 | 76 | 60.3 | 35 |
| 4 | 114.3 | 114.3 | 64 |
| 8 | 305 | 219.1 | 127 |
| 12 | 381 | 323.8 | 159 |
| 24 | 914 | 610 | 381 |
Indicative Packing & Pricing Guide
| Fitting Type | Indicative Basis |
|---|---|
| Super Duplex Elbow (90°/45°/180°) | Priced per size/schedule — request quote |
| Super Duplex Reducer (Con./Ecc.) | Priced per size/schedule — request quote |
| Super Duplex Tee (Equal/Unequal) | Priced per size/schedule — request quote |
| Super Duplex Stub End | Priced per size/schedule — request quote |
| Super Duplex End Cap | Priced per size/schedule — request quote |
| Super Duplex Cross | Priced per size/schedule — request quote |
Export Destinations
| Region | Representative Countries |
|---|---|
| Middle East | Saudi Arabia, UAE, Iran, Iraq, Qatar, Oman, Kuwait |
| Asia Pacific | China, Japan, South Korea, Pakistan, Bangladesh, Fiji |
| Europe | Italy, Germany, and other EU member states |
| Americas | USA, Canada, Mexico, Brazil, Argentina, Colombia |
| Africa | Egypt, Morocco, Algeria, Nigeria, Ghana, Senegal, Kenya, Ethiopia, Tanzania |
Manufacturing Process & Quality Assurance
Briefly describe the forging/piercing/extrusion/welding process, solution annealing (typically ~1925°F / 1100°C with rapid quenching to preserve the austenite-ferrite balance), and QA stages: raw material inspection, dimensional check, radiography/UT for welds, PMI, hydrostatic testing, and final visual inspection before packing. Mention ISO 9001:2015 certification and optional third-party inspection (SGS, BV, TUV) on customer request.
Certifications & Standards
- ISO 9001:2015 Certified Manufacturing Facility
- Manufactured as per ASTM A815 / ASME SA815
- Dimensions per ASME B16.9, B16.28, MSS-SP-43
- Mill Test Certificate as per EN 10204 3.1 / 3.2
- Third-party inspection available: SGS / BV / TUV / Lloyd’s
- NACE MR0175 / ISO 15156 compliant options for sour service
Super Duplex Pipe Fittings Price List
The Super Duplex pipe fittings price list varies depending on the grade, size, fitting type, schedule, wall thickness, and order quantity. Super Duplex fittings such as elbows, tees, reducers, crosses, caps, and stub ends are available in grades including UNS S32750 and UNS S32760. For the latest and most accurate price, contact the supplier with your required specifications, quantity, and applicable standards.
FAQs About Super Duplex Pipe Fittings
Super Duplex Pipe Fittings are high-performance stainless steel fittings manufactured with a mixed austenitic–ferritic structure, offering a combination of superior mechanical strength and outstanding corrosion resistance.
The most widely used grades include UNS S32750 and UNS S32760, known for their high chromium, molybdenum, and nitrogen content.
They provide nearly twice the strength of conventional austenitic stainless steels along with enhanced resistance to pitting, crevice corrosion, and stress corrosion cracking, especially in chloride-rich environments.
Yes, they are specifically designed for seawater and marine applications due to their excellent resistance to salt-induced corrosion and erosion.