Super Duplex 2507 / S32760 Pipe Fittings
Teshi Group manufactures Super Duplex 2507 / S32760 pipe fittings (ASTM A815 WPS32750 / WPS32760, A182 F53 / F55) as an OEM in India — butt weld fittings to ASME B16.9 and forged socket weld and threaded fittings to ASME B16.11, with heat-number traceability on every piece.
Super duplex stainless steels raise chromium, molybdenum and nitrogen to give a pitting resistance equivalent number (PREN) of 40 or more, for seawater, high-chloride brines and sour service where duplex 2205 is not enough.
Super Duplex 2507 / S32760 pipe fittings at a glance
| Material | Super Duplex 2507 / S32760 |
|---|---|
| Specification | Butt weld: ASTM A815 WPS32750 / ASTM A815 WPS32760 · Forged: ASTM A182 F53 / ASTM A182 F55 |
| UNS / W.Nr. | S32750 / 1.4410 · S32760 / 1.4501 |
| Sizes | Butt weld NPS ½"–48", Sch 5S–XXS · Forged NPS ⅛"–4" |
| Pressure class | Wall to pipe schedule (B16.9) · Class 2000, 3000, 6000, 9000 (B16.11) |
| Facing / ends | Bevelled ends to ASME B16.25; socket weld and NPT threaded ends |
| Certification | EN 10204 3.1 standard · 3.2 with third-party inspection · IBR on request |
| Testing | PMI, hardness, dimensional; UT, IGC, impact and ferrite as specified |
Super Duplex 2507 / S32760 chemistry and mechanical properties
Chemical composition of Super Duplex 2507 / S32760 (weight %, maximum unless a range)
| Grade | C | Mn | Si | Cr | Ni | Mo | Cu | N | W |
|---|---|---|---|---|---|---|---|---|---|
| 2507 (S32750) | 0.030 | 1.20 | 0.80 | 24.0–26.0 | 6.0–8.0 | 3.0–5.0 | 0.50 | 0.24–0.32 | — |
| S32760 (Zeron® 100 type) | 0.030 | 1.00 | 1.00 | 24.0–26.0 | 6.0–8.0 | 3.0–4.0 | 0.50–1.00 | 0.20–0.30 | 0.50–1.00 |
Mechanical properties of Super Duplex 2507 / S32760 (minimum, room temperature)
| Grade | Tensile strength | Yield strength (0.2 %) | Elongation | Note |
|---|---|---|---|---|
| 2507 (S32750) | 800 MPa (116 ksi) | 550 MPa (80 ksi) | 15 % | PREN ≥ 41 |
| S32760 (Zeron® 100 type) | 750 MPa (109 ksi) | 550 MPa (80 ksi) | 25 % | PREN ≥ 40 |
Matching specifications by product form
| Grade | Forged flanges & fittings | Butt weld fittings | Plate | Pipe |
|---|---|---|---|---|
| 2507 (S32750)UNS S32750 · W.Nr. 1.4410 | ASTM A182 F53 | ASTM A815 WPS32750 | ASTM A240 | ASTM A790 |
| S32760 (Zeron® 100 type)UNS S32760 · W.Nr. 1.4501 | ASTM A182 F55 | ASTM A815 WPS32760 | ASTM A240 | ASTM A790 |
Limits and minimums from the governing ASTM / ASME specifications, summarised for convenience; the current edition takes precedence.
Pressure rating
Butt weld fittings carry the same pressure rating as straight seamless pipe of the same material and wall thickness, so the fitting schedule is matched to the line pipe (ASME B16.9). Forged socket weld and threaded fittings are rated by class — 3000 and 6000 for socket weld, 2000, 3000 and 6000 for threaded — per ASME B16.11.
Types we manufacture
Dimension charts
Where Super Duplex 2507 / S32760 is used
- Seawater reverse-osmosis desalination
- Offshore firewater and seawater injection
- Sour service to NACE MR0175 / ISO 15156 when specified
- High-chloride hydrometallurgical leaching
- Subsea manifolds and process piping
Testing & certification
- Solution annealed and water quenched
- ASTM A923 Methods A/B/C when specified
- Ferrite content 40–60 % by ASTM E562 point count
- ASTM G48 ferric chloride pitting test when specified
- Hardness checks for NACE MR0175 / ISO 15156 sour service when specified
- PMI on every piece
FAQ
Super Duplex 2507 / S32760 pipe fittings: common questions
What specification covers Super Duplex 2507 / S32760 pipe fittings?
Super Duplex 2507 / S32760 butt weld fittings are made to ASTM A815 WPS32750 / ASTM A815 WPS32760 with dimensions to ASME B16.9; forged socket weld and threaded fittings are made to ASTM A182 F53 / ASTM A182 F55 with dimensions to ASME B16.11.
What is the chemical composition of 2507 (S32750)?
2507 (S32750) (UNS S32750): C 0.030, Mn 1.20, Si 0.80, Cr 24.0–26.0, Ni 6.0–8.0, Mo 3.0–5.0, Cu 0.50, N 0.24–0.32 (weight %; single values are maximums).
What are the minimum mechanical properties of 2507 (S32750)?
Tensile strength 800 MPa (116 ksi), yield strength 550 MPa (80 ksi), elongation 15 %.
Is Teshi Group a manufacturer of Super Duplex 2507 / S32760 pipe fittings in India?
Yes. Teshi Group has manufactured flanges and fittings in India since 1971 and is ISO 9001:2015 certified and IBR approved. Every Super Duplex 2507 / S32760 piece is hard-stamped with its heat number and supplied with an EN 10204 3.1 certificate; 3.2 with third-party inspection on request.
What is the PREN of super duplex 2507?
PREN = Cr + 3.3 Mo + 16 N. For UNS S32750 (ASTM A182 F53) it is typically 41–43, and super duplex is generally defined as PREN of at least 40.
Is UNS S32760 the same as Zeron 100?
Zeron® 100 is a registered trade name for an alloy within UNS S32760 (ASTM A182 F55). S32760 adds 0.5–1.0 % tungsten and copper to 2507-type chemistry. Teshi Group supplies S32760 to the ASTM specification.
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