Super Duplex Steel Flanges
Stockist, importer and exporter of super duplex steel flanges in Mumbai, India — Flanges: 1/2" – 36", produced to ASTM A182 F53 / F55, with EN 10204 3.1 / 3.2 certification and export to 40+ countries.
What is Super Duplex Steel Flanges?
Super Duplex Steel Flanges is super duplex steel supplied in flanges form — flanges are forged connectors that bolt piping, valves and equipment together — weld neck, slip-on, blind, socket weld, lap joint, threaded and orifice types in raised-face or ring-joint form. Steelco Metal & Alloys stocks super duplex steel flanges in Mumbai, India in Flanges: 1/2" – 36", produced to ASTM A182 F53 / F55, in grades including Super Duplex 2507, Zeron 100, Duplex 2205. Every dispatch carries an EN 10204 3.1 mill test certificate (3.2 with third-party witness on request), PMI verification and heat-number traceability, and we export to more than 40 countries.
All grades we stock in super duplex steel flanges.
Click any grade for its full chemical composition, mechanical properties, equivalents and typical applications. Every grade ships with EN 10204 3.1 / 3.2 certification from our Mumbai stockyard.
Why Choose Super Duplex Steel Flanges
Sound forged structure
Flanges is forged with a controlled reduction ratio and solution annealed, giving uniform grain flow and full mechanical properties through section.
Machined to drawing
Rough turned, proof machined or finish machined against your drawing, with dimensional reports supplied.
NDT on request
Ultrasonic, dye-penetrant and magnetic-particle examination to ASTM A388 / E165 before dispatch.
Technical Specifications
| Attribute | Details |
|---|---|
| Product | Super Duplex Steel Flanges |
| Size range | Flanges: 1/2" – 36" |
| Thickness / wall | Class 150 – 2500 |
| Finish / condition | Forged, RF / RTJ |
| Standards | ASTM A182 F53 / F55 |
| Grades stocked | Super Duplex 2507, Zeron 100, Duplex 2205 |
| Certification | EN 10204 3.1 as standard, 3.2 with TÜV / SGS / BV / Lloyd's / IRS witness on request |
| Origin | Mill-direct from approved Indian, European, Japanese and Korean producers |
| Dispatch | Ex-stock Mumbai, India; export via Nhava Sheva (JNPT), Mundra and Mumbai ports |
Use our free metal weight calculator — bars, sheets, plates, pipes and sections.
Grade chemistry and mechanical properties supplied in super duplex steel flanges.
Chemical composition and mechanical properties are grade properties, not form properties — the same grade keeps the same chemistry whether it is supplied as sheet, plate or coil. The tables below list the specified limits for each grade we stock in super duplex steel flanges, tested and certified to ASTM A182 F53 / F55. Values are weight percent (maximum unless a range is shown); mechanical values are minima in the annealed condition.
Chemical composition (weight %)
| Grade | C | Cr | Ni | Mo | N | Cu | Mn | P | W | Si |
|---|---|---|---|---|---|---|---|---|---|---|
| Super Duplex 2507UNS S32750 | 0.030 | 24.0–26.0 | 6.0–8.0 | 3.0–5.0 | 0.24–0.32 | 0.50 | 1.20 | 0.035 | — | — |
| Zeron 100UNS S32760 | 0.030 | 24.0–26.0 | 6.00–8.00 | 3.00–4.00 | 0.20–0.30 | 0.50–1.00 | 1.00 | — | 0.50–1.00 | — |
| Duplex 2205UNS S31803 / S32205 | 0.030 | 22.0–23.0 | 4.5–6.5 | 3.0–3.5 | 0.14–0.20 | — | 2.00 | 0.030 | — | 1.00 |
Balance iron. Single figures are maximum limits. Mill test certificates to EN 10204 3.1 are issued with every dispatch.
Mechanical properties (annealed, minimum)
| Grade | Tensile Strength (min) | Yield Strength (0.2%) | Elongation in 50 mm | Hardness (Rockwell C) | PREN |
|---|---|---|---|---|---|
| Super Duplex 2507 | 795 MPa (116 ksi) | 550 MPa (80 ksi) | 15% min | 32 max (NACE MR0175) | — |
| Zeron 100 | 750 MPa (109 ksi) | 550 MPa (80 ksi) | 25% min | — | 40 minimum |
| Duplex 2205 | 620 MPa (90 ksi) | 450 MPa (65 ksi) | 25% min | 31 max (NACE MR0175) | — |
Typical annealed values; actual results are stated on the heat-specific mill test certificate.
Application Sectors
Subsea & Offshore
Manifolds, jumpers, umbilicals and christmas-tree components in F55.
Desalination
High-pressure RO piping, energy recovery and brine systems in 2507.
Oil & Gas
Sour-service flowlines, valve bodies and separator internals to NACE MR0175.
Chemical Tankers
Cargo tanks, deepwell pumps and cargo piping.
Power & FGD
Seawater cooling systems and flue gas desulphurisation absorbers.
Mining & Minerals
Slurry pipework, autoclave internals and acid leaching circuits.
Cut, finished and certified to your drawing.
Material leaves our Mumbai facility finished to your specification — not as raw stock.
Why buy from Steelco.
Steelco Metal & Alloys is a Mumbai-based stockist, importer and exporter of stainless steel and nickel alloys, shipping certified material worldwide.
Quality & testing on every dispatch
- EN 10204 3.1 mill test certificate on every dispatch
- 3.2 certification with TÜV / SGS / BV / Lloyd's / IRS / IBR witness on request
- Positive Material Identification (PMI) with portable XRF / OES
- Dye-penetrant (DPT), ultrasonic (UT) and hydro testing on request
- NACE MR0175 / ISO 15156 compliance for sour service
- PED 2014/68/EU compliance for pressure equipment
- Heat-number stencilling and marking for full traceability
Deep ready stock
Ready stock of super duplex steel flanges in 3 grades at our Mumbai warehouse, so standard sizes ship the same week rather than waiting on a mill rolling programme.
Mill-direct sourcing
Approved supply from Jindal, JSL, Outokumpu, Aperam, Acerinox, Sandvik and leading Japanese and Korean mills — every item traceable to a named producer.
Full certification
EN 10204 3.1 mill test certificate as standard, 3.2 with TÜV, SGS, BV, Lloyd's, IRS or IBR witness, plus PMI, DPT and UT reports on request.
On-time worldwide delivery
Regular export shipments to the GCC, Africa, Southeast Asia, Europe, Latin America and the USA via Nhava Sheva (JNPT), Mundra and Mumbai ports.
How your material is packed and shipped.
Every consignment leaves our Mumbai facility protected for transit and documented for customs, whether it moves by road within India or by sea to an overseas port.
Domestic & export packing
- Wooden crates, pallets or steel bundles depending on section and weight
- Plastic caps, PVC film and VCI paper to protect surfaces and ends in transit
- Heat number and grade stencilled on every piece or bundle tag
- Seaworthy ISPM-15 treated packing for export consignments
Global shipments
- HS Code: 7307
- FOB / CFR / CIF terms via Nhava Sheva (JNPT), Mundra and Mumbai ports
- Documentation: commercial invoice, packing list, MTC, bill of lading, COO, insurance
- Regular exports to the GCC, Africa, Southeast Asia, Europe, Latin America and the USA
Ready to price your requirement?
Share grade, size and quantity — our Mumbai desk responds with pricing, stock position and lead time, usually the same working day.
Frequently asked questions.
Answers to the questions our Mumbai desk is asked most often.
What is super duplex steel flanges?
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Super Duplex Steel Flanges is flanges are forged connectors that bolt piping, valves and equipment together — weld neck, slip-on, blind, socket weld, lap joint, threaded and orifice types in raised-face or ring-joint form, produced in super duplex steel to ASTM A182 F53 / F55. Steelco stocks it in Mumbai in Flanges: 1/2" – 36" across grades such as Super Duplex 2507, Zeron 100, Duplex 2205.
Which grades of flanges do you stock?
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We hold 3 grades in ready stock: Super Duplex 2507 (S32750 / F53), Zeron 100 (S32760 / F55), Duplex 2205 (S31803 / S32205). Other grades are rolled or forged to order against a mill programme.
What sizes of super duplex steel flanges are available?
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Stock covers Flanges: 1/2" – 36", with thickness or wall from Class 150 – 2500 in forged, rf / rtj condition. Non-standard sizes are cut, machined or mill-rolled to your requirement.
What is the price of super duplex steel flanges in India?
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Price is quoted per kilogram and moves with the alloy surcharge, the grade and the size. Send the grade, size, quantity and certification you need and our Mumbai desk replies the same working day with price, stock position and lead time.
Do you supply flanges with test certificates?
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Yes. Every consignment ships with an EN 10204 3.1 mill test certificate showing chemistry and mechanical results against ASTM A182 F53 / F55. EN 10204 3.2 certification witnessed by TÜV, SGS, BV, Lloyd's, IRS or IBR is arranged on request, along with PMI, dye-penetrant and ultrasonic reports.