Super Duplex 2507 SheetASTM A240 UNS S32750 · Manufacturer, stockist & exporter, India
Also sold as UNS S32750 · W.Nr 1.4410 · F53 · SAF 2507
Super Duplex 2507 sheet is Super Duplex 2507 (UNS S32750) rolled below 3/16" (4.76 mm) thick for formed, pressed and lined parts under ASTM A240. It is a super duplex stainless steel, chosen for seawater and high-chloride service where strength also matters. Kanak Steel & Engineering Co. supplies it with EN 10204 3.1 mill certificates from Mumbai to buyers across India, the Gulf, South-East Asia, South America, Europe, the UK and the USA.
- 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 2507 Sheet?
Super Duplex 2507 sheet is a super duplex stainless steel supplied as sheet to ASTM A240 (UNS S32750). Buyers specify it for seawater and high-chloride service where strength also matters. It is also sold as UNS S32750, W.Nr 1.4410, F53.
- What it is
- Super duplex stainless steel
- Standard
- ASTM A240
- Thickness
- Below 3/16" (4.76 mm)
- Density
- 7.8 g/cm³
- Supplied as
- Annealed · 2B, 2D
- Best at
- Seawater and high-chloride service where strength also matters
Super Duplex 2507 Sheet Specification & Sizes
| Material standard | ASTM A240 · ASME SA-240 |
|---|---|
| General requirements | ASTM A480 — dimensions, tolerances and finishes |
| Grade | Super Duplex 2507 · UNS S32750 · W.Nr 1.4410 |
| Thickness | Below 3/16" (4.76 mm) — thicker is plate |
| Width × length | 1000 / 1219 / 1250 / 1500 mm × 2000 / 2438 / 2500 / 3000 mm, or cut to size |
| Condition & finish | Annealed · 2B or 2D |
| Cutting | Cut to size and to width |
| Testing | PMI · UT (plate) · intergranular corrosion · hardness, on request |
| Documents | EN 10204 3.1 · 3.2 with third-party inspection · packing list · certificate of origin |
Sheet or plate?
Both are ordered under ASTM A240, so buyers often mix them up. The line is thickness: below 3/16" is sheet, 3/16" and over is plate. If your drawing calls for 3/16" (4.76 mm) or more, you need Super Duplex 2507 plate.
Super Duplex 2507 Sheet Finishes — Which to Order
Sheet is bought for its surface as much as its chemistry. The finish is set at the mill and cannot be fixed later without polishing cost, so name it on the order. Finish designations for 2507 sheet follow ASTM A480.
| Finish | How it is made | Choose it for |
|---|---|---|
| 2D | Cold rolled, annealed and pickled | Matt finish; common on thinner duplex sheet for fabrication. |
| 2B | Cold rolled, annealed, pickled and skin passed | Smoother and more uniform than 2D; the usual duplex sheet finish. |
| No.1 | Hot rolled, annealed and pickled | Rougher, for heavier sheet close to the plate boundary. |
| Polished | No.4 or similar on request | Where appearance or cleanability matters; confirm availability by thickness. |
Super Duplex 2507 Sheet 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 |
| Carbon | As specified |
| Manganese | As specified |
| Silicon | As specified |
| Phosphorus | As specified |
| Sulphur | 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 S32750.
Super Duplex 2507 Sheet 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 S32750 — Solution-annealed plate & sheet.
Density & Physical Properties
| Property | Value |
|---|---|
| Density | 7.8 g/cm³ |
| Melting range | 1350 – 1400 °C |
| Magnetic | Magnetic (ferritic phase) |
| PREN (approx.) | ≈ 42 |
Super Duplex 2507 Equivalent Grades
Super Duplex 2507 Sheet Weight Chart & Calculator
Use this to budget freight and price per piece. Weight (kg) = length (m) × width (m) × thickness (mm) × 7.8.
Example: 2500 × 1250 × 2 mm
2.5 × 1.25 × 2 × 7.8 = 48.8 kg
Total weight —
| Thickness | 2500 × 1250 sheet | Per m² |
|---|---|---|
| 0.5 mm | 12.2 kg | 3.9 kg |
| 0.8 mm | 19.5 kg | 6.2 kg |
| 1 mm | 24.4 kg | 7.8 kg |
| 1.2 mm | 29.3 kg | 9.4 kg |
| 1.5 mm | 36.6 kg | 11.7 kg |
| 2 mm | 48.8 kg | 15.6 kg |
| 3 mm | 73.1 kg | 23.4 kg |
| 4 mm | 97.5 kg | 31.2 kg |
Super Duplex 2507 sheet gauge to mm
Gauge numbers are still common on drawings. Weights below use the density of Super Duplex 2507, 7.8 g/cm³.
Full chart: SWG sheet gauge chart.
| SWG | mm | inch | kg/m² (ρ 7.8) |
|---|---|---|---|
| 10 | 3.251 | 0.1280 | 25.36 |
| 11 | 2.946 | 0.1160 | 22.98 |
| 12 | 2.642 | 0.1040 | 20.61 |
| 14 | 2.032 | 0.0800 | 15.85 |
| 16 | 1.626 | 0.0640 | 12.68 |
| 18 | 1.219 | 0.0480 | 9.51 |
| 20 | 0.914 | 0.0360 | 7.13 |
| 22 | 0.711 | 0.0280 | 5.55 |
| 24 | 0.559 | 0.0220 | 4.36 |
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 2507 Sheet 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 2507 is most often mixed up with Duplex 2205 — 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 2507 | Duplex 2205 |
|---|---|---|
| Nickel | As specified | As specified |
| Chromium | As specified | As specified |
| Molybdenum | As specified | As specified |
| Copper | As specified | — |
| Iron | As specified | As specified |
| Manganese | As specified | As specified |
Super Duplex 2507 Sheet Price — What Decides It
Two quotes for "2507 sheet" can differ by 20% and both be fair. We quote 2507 sheet 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 2507 Sheet Tolerances, Edge & Flatness
Thickness, width, length and flatness tolerances for 2507 sheet come from ASTM A480, the general-requirements standard called up by the product specification. Most quality problems with sheet are about these four, not the chemistry.
| Thickness tolerance | Per ASTM A480 tables, by thickness and width; ask for a tighter range on the PO if your press tooling needs it |
|---|---|
| Edge | Mill edge, or slit / cut edge for an exact width |
| Flatness | Standard flatness per ASTM A480; specify levelled or tension-levelled sheet where flatness is critical |
| Surface protection | PVC / PE film on bright and polished finishes; use laser-grade film if the sheet will be laser cut |
| Marking | Grade, heat number and standard on each sheet, or on each bundle for small pieces |
Sheet, Strip, Plate or Coil?
Under ASTM A480, flat material below 3/16" (4.76 mm) and 24" or wider is sheet; cold-rolled material narrower than 24" is strip; 3/16" (4.76 mm) and over it is plate (the metric edition, A480M, rounds these to 5 mm and 600 mm). Coil is the same product wound up for continuous processing — order coil if you will slit, blank or roll-form it yourself.
Super Duplex 2507 Sheet Applications
Sheet goes where 2507 has to be formed, pressed or used as a thin lining. For heavy shells, tube sheets and machined parts, see Super Duplex 2507 plate.
How your 2507 sheet 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 before processing is available on request.
- 03Processing — cutting to your sizes, with heat numbers transferred to every piece.
- 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
Forming & Welding Super Duplex 2507 Sheet
Thin sheet is formed, folded and welded with little margin for heat. These are the points fabricators ask us about — matching filler for 2507 is ER2594 (AWS A5.9).
General guidance only; follow your approved WPS and forming procedure.
| Bending | Duplex is about twice as strong as 316L, so it needs more press force, larger bend radii and allowance for higher springback. |
|---|---|
| Welding | Follow a duplex WPS that controls heat input and interpass temperature to keep the ferrite–austenite balance. |
| Back-purging | Use argon (or argon–nitrogen) root purge on thin sheet. |
| Clean-up | Pickle or passivate weld zones; avoid iron contamination. |
How to Order Super Duplex 2507 Sheet: RFQ Checklist
Get an accurate quote the first time. Copy this list into your enquiry:
- Standard and edition — e.g. ASTM A240-latest
- Thickness × width × length, and number of pieces
- Finish (2B, BA, No.4…) and protective film if needed
- Certificate type — 3.1 or 3.2, and the inspection agency
- Extra tests — NACE, UT, intergranular corrosion
- Delivery port, Incoterm and required date
Super Duplex 2507 sheet for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiSuper Duplex 2507 sheet — questions buyers ask
Is Super Duplex 2507 the same as UNS S32750?
UNS S32750, W.Nr 1.4410, F53 are names used for Super Duplex 2507 (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 sheet is ordered to ASTM A240 whichever name is on the enquiry.
What is the price of Super Duplex 2507 sheet per kg?
It moves with nickel on the LME, so a fixed list price is out of date within days. Thickness, cut size, quantity and documents also change it. Send your size and quantity and we quote the same working day.
What documents come with an export shipment?
An EN 10204 3.1 mill certificate (or 3.2 with a third-party inspector), commercial invoice, packing list with heat numbers, and certificate of origin. Test reports are added for any extra tests ordered.
Which finish should I order for Super Duplex 2507 sheet?
2B, unless the drawing says otherwise. Order BA for a mirror-like surface, No.4 for a brushed look and 2D for deep drawing.
Is Super Duplex 2507 sheet ordered by gauge or by millimetre?
ASTM A240 uses millimetres or inches. Gauge numbers still appear on older drawings; the gauge-to-mm table on this page converts them, with 7.8 g/cm³ weights for 2507.
Can I order Super Duplex 2507 sheet cut to size?
Yes. Send finished sizes and quantities, or a drawing; we quote cut pieces as well as full sheets. Tell us if edges must be deburred or protected.
Sheet, strip or coil — which should I order?
Sheet if you need flat pieces below 3/16" (4.76 mm) and at least 24" wide; strip if narrower; coil if you will slit, blank or roll-form the material on your own line.
What is the minimum order for sheet?
There is no fixed minimum for stock sizes — single sheets and cut pieces are quoted. Mill orders for a non-stock thickness or finish carry the mill minimum.
Super Duplex 2507 or Hastelloy C276 — which should I choose?
Super Duplex 2507 is chosen for seawater and high-chloride service where strength also matters. Hastelloy C276 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