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Duplex and super duplex
Enquire for super duplex 2507 pipes or tubes. Specify the UNS grade, product standard, size and required inspection.
Request a quoteTechnical reference
| Field | Order reference |
|---|---|
| Standard | A790 pipe or A789 tubing, as specified |
| Product or route | Super duplex stainless, UNS S32750 |
| Critical dimensions and fit | State the material, product route and actual fitting or tube-sheet interface |
| Supply enquiry | Confirm sizes, lengths, route, documentation and lead time for your order |
Selected ASME B36.19 dimensions. Schedule columns give nominal wall thickness. Theoretical inside diameter and mass use nominal dimensions, with a reference density of 8,000 kg/m³. Actual mass varies by grade and tolerances.
| NPS | OD (mm) | 10S wall (mm) | 40S wall (mm) | 80S wall (mm) | 40S ID (mm) | 40S kg/m |
|---|---|---|---|---|---|---|
| 1 | 33.40 | 2.77 | 3.38 | 4.55 | 26.64 | 2.55 |
| 2 | 60.33 | 2.77 | 3.91 | 5.54 | 52.51 | 5.54 |
| 3 | 88.90 | 3.05 | 5.49 | 7.62 | 77.92 | 11.51 |
| 4 | 114.30 | 3.05 | 6.02 | 8.56 | 102.26 | 16.38 |
| 6 | 168.28 | 3.40 | 7.11 | 10.97 | 154.06 | 28.80 |
Reference ASME B36.19 dimensional standard · Tonkin stainless pipe dimensional chart
For tubing, order by actual outside diameter and wall. Drawing example: NPS 3 Sch 40S pipe or 25.4 × 2.11 mm tubing.
Use the approved design code and service conditions. The applicable rating depends on material, temperature, minimum effective wall, joint details and the limits of the connected assembly. A schedule or a hydrostatic test result alone cannot establish an operating pressure.
Reference ASME process piping code B31.3
Selected A789 tubing chemistry ranges by mass. Verify the full chemistry under the nominated product specification.
| UNS | C max (%) | Cr (%) | Ni (%) | Mo (%) | N (%) |
|---|---|---|---|---|---|
| S32750 | 0.03 | 24–26 | 6–8 | 3–5 | 0.24–0.32 |
Reference Centravis tubular product catalogue · Alleima 2507 alloy data
Mill example from the Alleima heat-exchanger tube range. Use the ordered A789 or A790 edition and applicable product condition for acceptance.
| Grade | Proof stress (MPa) | Tensile strength (MPa) | Elongation min (%) |
|---|---|---|---|
| SAF 2507 | 550 | 800–1,000 | 25 |
Reference Alleima heat-exchanger tube properties
Record corrosion test, phase evidence and witness requirements if the order specifies them.
| When | What to check |
|---|---|
| Before ordering | Document the required test method, edition and any witness points |
| At delivery | Match the material report and heat or lot identification to the shipment |
Do not combine S32750 and other super duplex UNS grades on one purchasing line.
For the enquiry, state the material, product route and actual fitting or tube-sheet interface.
A790 pipe or A789 tubing, as specified · NPS 3 Sch 40S pipe or 25.4 × 2.11 mm tubing. Add quantity, lengths, delivery city and the required reports.
Ordering guidance
For a 2507 requirement, use the exact designation on the drawing, such as UNS S32750 when specified. Other super duplex grades are separate purchase requirements unless the project authority approves them.
For pipe, give NPS and schedule or wall. For tubing, give actual OD and wall thickness. Include the nominated product standard and supplementary testing, if any, so the offer can be checked against the order.
Check pricing and availability →
Buyer’s guide
2507 is associated with UNS S32750, a super duplex stainless grade. Projects may also specify other super duplex UNS designations. Record the exact UNS from the material list and compare it against the offered certificate. Where corrosion resistance drives selection, the process conditions and approved material assessment govern the choice.
For pipe, use the nominated specification such as A790, along with NPS, wall and ends. For tubing, use the applicable specification such as A789 and give actual OD, wall, lengths and tolerances. Include the allowed manufacturing route and delivery condition on each line.
Where the project requires corrosion testing, phase balance evidence, material verification or witness inspection, attach the inspection plan and acceptance details. Identify whether the job needs full lengths or cut pieces with traceability. Ask the quotation to show any additional inspection time alongside the delivery lead time.
A seawater-system order can identify S32750, A790 pipe, size and schedule or wall, manufacturing route and the required corrosion or phase test reports from the project specification. Quote companion tubes separately by actual dimensions.
Material approval depends on the specified corrosion and mechanical requirements. Submit any proposed change to the project reviewer with its full designation and supporting documentation.
Technical references ASTM A790/A790M duplex pipe scope · ASTM steel standards directory · Alleima 2507 tube and pipe data
Prepare your enquiry
| Item | What to send |
|---|---|
| Product details | Required UNS grade · product standard · dimensions · route · supplementary tests |
| Delivery | Quantity with units, delivery city and required date if known |
| Acceptance | Required certificates and inspection scope; attach the drawing revision where applicable |
No. Check the offered grade and its documentation against the exact project requirement.
Technical reference: ASTM steel standards catalogue
Project enquiries
Send your dimensions, quantities and delivery city. Include any inspection or material certificate requirements so they can be quoted against the same line items.
Request a quote → Call +91 99204 92715