Super Duplex S32760 Pipe & TubeASTM A790 UNS S32760 · Manufacturer, trader & exporter, India
Also sold as UNS S32760 · W.Nr 1.4501 · F55 · Zeron 100
Super Duplex S32760 pipe is supplied seamless to ASTM A790 and welded to ASTM A790 · A928, in ASME pipe sizes and schedules, with tube to ASTM A789. It is a super duplex stainless steel with copper and tungsten, chosen for seawater firewater, injection and offshore piping. Kanak Steel & Engineering Co. manufactures, trades and exports it from Mumbai; EN 10204 3.1 or 3.2 certificates are available on request / as specified in the PO. Markets we have supplied to include Oman, UAE, Saudi Arabia, Brazil, Argentina, Spain and Chile (India is the home market).
- Stock & mill supply
- EN 10204 3.1 / 3.2
- PMI on request
- NACE MR0175 on request
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is Super Duplex S32760 Pipe & Tube?
Super Duplex S32760 pipe & tube is a super duplex stainless steel with copper and tungsten supplied as pipe & tube to ASTM A790 (UNS S32760). Buyers specify it for seawater firewater, injection and offshore piping. It is also sold as UNS S32760, W.Nr 1.4501, F55.
- What it is
- Super duplex stainless steel with copper and tungsten
- Seamless
- ASTM A790
- Welded
- ASTM A790 · A928
- Sizes
- NPS ⅛" – 24" · OD tube to order
- Schedules
- 5S · 10S · 40S · 80S · 160 · XXS
- Best at
- Seawater firewater, injection and offshore piping
Super Duplex S32760 Pipe & Tube Specification & Sizes
| Seamless pipe | ASTM A790 |
|---|---|
| Welded pipe | ASTM A790 · A928 |
| Tube | ASTM A789 |
| Grade | Super Duplex S32760 · UNS S32760 · W.Nr 1.4501 |
| Size & schedule | NPS ⅛" to 24" to ASME B36.19 / B36.10; OD × wall for tube |
| Length | Single random, double random, or cut lengths |
| Ends | Plain end · bevelled end (for welding) · threaded |
| Testing | Hydrostatic or eddy-current · PMI · flattening & flaring · IGC on request |
| Documents | EN 10204 3.1 · 3.2 with third-party inspection |
Super Duplex S32760 Pipe: Seamless, Welded or Tube?
Three different specifications cover S32760 tubular products. Pick the route first — it decides price, test requirements and lead time. General requirements (tolerances, hydrostatic or electric testing) come from ASTM A999. Schedules, the −12.5% wall tolerance and the B31.3 wall formula are explained in the pipe guide.
| Route | Specification | Use it for |
|---|---|---|
| Seamless pipe | ASTM A790 | Pressure and critical service; no weld seam to inspect. |
| Welded pipe | ASTM A790 · A928 | Economical in larger diameters and thinner walls where the code allows it. |
| Tube | ASTM A789 | Heat exchangers and instruments; ordered by exact OD × wall. |
Super Duplex S32760 Pipe Wall & Weight by Schedule
For the same size, the schedule sets the wall — and the weight you pay for. Cross-sections are drawn to scale for 2" NPS (OD 60.33 mm, ASME B36.19); weights use the density of Super Duplex S32760, 7.84 g/cm³.
Other sizes: pipe schedule chart and weight calculator.
Super Duplex S32760 Pipe & Tube Chemical Composition
Under technical review for TDS.
| Element | Current requirement |
|---|---|
| Chromium | As specified |
| Nickel | As specified |
| Molybdenum | As specified |
| Nitrogen | As specified |
| Copper | As specified |
| Tungsten | As specified |
| Carbon | As specified |
| Manganese | As specified |
| Silicon | As specified |
| Iron | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification to be verified: ASTM A240 for UNS S32760.
Super Duplex S32760 Pipe & Tube Mechanical Properties
Under technical review for TDS.
| Property | Current requirement |
|---|---|
| Tensile strength | As specified |
| Yield strength 0.2% | As specified |
| Elongation | As specified |
| Hardness | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification and condition to be verified: ASTM A240 for UNS S32760 — Solution-annealed plate.
Density & Physical Properties
| Property | Value |
|---|---|
| Density | 7.84 g/cm³ |
| Melting range | 1350 – 1400 °C |
| Magnetic | Magnetic (ferritic phase) |
| PREN (approx.) | ≈ 41 |
Super Duplex S32760 Equivalent Grades
Super Duplex S32760 Pipe Weight Chart (kg/m)
Weight per metre (kg/m) = (OD − WT) × WT × 0.02463, with OD and wall thickness in mm. The factor comes from Super Duplex S32760's density of 7.84 g/cm³.
Example: 4" Sch 40S (114.30 × 6.02 mm)
(114.30 − 6.02) × 6.02 × 0.02463 = 16.06 kg/m
| NPS | OD mm | Sch 10S kg/m | Sch 40S kg/m |
|---|---|---|---|
| ½" | 21.34 | 1.00 | 1.27 |
| 1" | 33.40 | 2.09 | 2.50 |
| 2" | 60.33 | 3.93 | 5.43 |
| 3" | 88.90 | 6.45 | 11.28 |
| 4" | 114.30 | 8.36 | 16.06 |
| 6" | 168.28 | 13.81 | 28.22 |
| 8" | 219.08 | 19.94 | 42.49 |
Six-digit Harmonized System heading (iron and steel, chapter 72–73). Your country adds its own digits — confirm with your customs broker. All HS codes.
How to Verify Super Duplex S32760 Pipe & Tube with PMI
Positive material identification with a handheld XRF gun confirms the alloy on the piece itself, in seconds, before it is cut or welded. Super Duplex S32760 is most often mixed up with Super Duplex 2507 — the table shows which elements tell them apart.
Handheld XRF does not measure carbon or nitrogen, so it cannot confirm the nitrogen that duplex depends on: that comes from the mill certificate or optical emission (OES) testing. PMI can be arranged on request — state it on your enquiry.
Under technical review for TDS.
| Element | Super Duplex S32760 | Super Duplex 2507 |
|---|---|---|
| Nickel | As specified | As specified |
| Chromium | As specified | As specified |
| Molybdenum | As specified | As specified |
| Copper | As specified | As specified |
| Tungsten | As specified | — |
| Iron | As specified | As specified |
| Manganese | As specified | As specified |
Super Duplex S32760 Pipe & Tube Price — What Decides It
Two quotes for "S32760 pipe & tube" can differ by 20% and both be fair. We quote S32760 pipe & tube per kg for full sizes and per piece for cut sizes. These six things move the price per kg, so you can compare offers like for like.
Super Duplex S32760 Pipe & Tube Applications
Super Duplex S32760 is specified when the cheaper grade will not survive the service but a higher alloy would be more than the job needs. These are the jobs our buyers use it for.
Super Duplex S32760 Pipe & Tube vs 2507, 2205 and 625
| Grade | Pipe & Tube standard | PREN (approx.) | Pick it when |
|---|---|---|---|
| Duplex 2205 | ASTM A790 | ≈ 35 | Strength with chloride resistance at a stainless-steel budget |
| Super Duplex S32760 | ASTM A790 | ≈ 41 | Seawater firewater, injection and offshore piping |
| Super Duplex 2507 | ASTM A790 | ≈ 42 | Seawater and high-chloride service where strength also matters |
| Inconel 625 | ASTM B444 | ≈ 51 | Seawater, high strength and high temperature in one alloy |
PREN = Cr + 3.3 Mo + 16 N, from mid-range chemistry. A screening guide, not a substitute for corrosion data on your medium.
Super Duplex S32760 Corrosion Resistance — Element by Element
Each alloying addition has a job. Knowing which one protects against your medium is the quickest way to judge whether S32760 fits.
Guaranteed PREN of 40 or more for seawater systems.
Copper and tungsten add resistance to sulphuric acid and crevice corrosion.
High yield strength, in the super duplex class.
Keep service below about 250 °C.
How your S32760 pipe & tube order runs
- 01Enquiry review — we confirm size, standard edition and documents against your MR or drawing.
- 02Heat selection & PMI — the mill certificate is checked against your order; PMI can be arranged depending on product and requirements, as specified in the PO.
- 03Processing — cutting, machining or bevelling to your specification, with heat numbers marked as specified in the PO.
- 04Inspection — your third-party inspector witnesses, or we share photos and test reports.
- 05Packing & dispatch — seaworthy packing from Nhava Sheva (JNPT), Mumbai, FOB or CIF, documents sent before the vessel sails.
Standards on this page
Welding & Fabricating Super Duplex S32760 Pipe & Tube
Super Duplex S32760 welds by all common arc processes. A few points our buyers ask about:
| Matching filler | ER2594 · Zeron 100X |
|---|---|
| Over-alloyed filler | Qualified procedures with ferrite and impact checks |
| Preheat | Not required; keep interpass temperature low |
| Cutting | Thermal or abrasive cutting; grind off heat-tinted edges before welding |
Follow your approved WPS; this is general guidance. See also S32760 fittings and S32760 flanges for the matching pipe-system parts.
How to Order Super Duplex S32760 Pipe & Tube: RFQ Checklist
Get an accurate quote the first time. Copy this list into your enquiry:
- Seamless or welded, and the standard
- NPS and schedule (or OD × wall for tube)
- Length — random or cut, and number of lengths
- End finish — plain, bevelled or threaded
- Certificate type and extra tests
- Delivery port, Incoterm and required date
Super Duplex S32760 pipe & tube — questions buyers ask
Is Super Duplex S32760 the same as UNS S32760?
UNS S32760, W.Nr 1.4501, F55 are names used for Super Duplex S32760 (W.Nr / EN numbers and older UNS variants are the closest designations; their limits can differ slightly, so specify the UNS number and ASTM grade on the order), and pipe & tube is ordered to ASTM A790 whichever name is on the enquiry.
What is the difference between Super Duplex S32760 pipe and tube?
Pipe is ordered by nominal pipe size and schedule, for carrying fluids. Tube is ordered by exact outside diameter and wall, for heat exchangers and instruments, and is held to tighter tolerances.
Seamless or welded Super Duplex S32760 pipe — which should I buy?
Seamless (ASTM A790) is the default for pressure and critical service. Welded (ASTM A790 · A928) is cheaper in larger diameters and thinner walls and is accepted where the design code allows it.
What is the wall-thickness tolerance on Super Duplex S32760 pipe?
Seamless pipe is normally allowed −12.5% on nominal wall under its general-requirements standard (ASTM A999). Allow for it in the pressure calculation or order on minimum wall.
Can Super Duplex S32760 pipe be welded to carbon-steel pipe?
Yes, with the right filler: ER2209 or ER309L(Mo) is used when joining it to carbon steel, under a qualified WPS. Follow a qualified WPS.
Can Super Duplex S32760 pipe & tube be supplied to NACE MR0175?
Super Duplex S32760 (UNS S32760) can be supplied for sour service when the PO specifies NACE MR0175 / ISO 15156; acceptability depends on the material condition, hardness and the environmental limits in that standard, which the purchaser must confirm for the application.
Super Duplex S32760 or Inconel 625 — which should I choose?
Super Duplex S32760 is chosen for seawater firewater, injection and offshore piping. Inconel 625 is the step up when you need more pitting resistance or strength. See the comparison table on this page, or ask us with your process conditions.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026