Designation Cross-Reference

S32750 — ASTM Equivalent

Holding a datasheet that specifies S32750 (UNS)? The valve-grade equivalent, its properties, and certified supply of the matching ASTM grade.

What is the ASTM equivalent of S32750?

S32750 is a UNS designation corresponding to ASTM A182 F53 / UNS S32750 (Super Duplex 2507) (Super Duplex 2507) and A890 Grade 5A (Super Duplex 2507 (Grade 5A Cast)) and A182 F53 (Super Duplex 2507 (F53)) for industrial valve service. The full grade data is below - equivalence is by nominal chemistry and mechanical class, so confirm composition and heat-treat condition against the governing standard before substituting in critical service.

A182 F53 / UNS S32750 (Super Duplex 2507)

Duplex & Super Duplex

Super Duplex 2507 - both form.

Service temperature-50°C to +300°C

Nominal compositionCr 25%, Ni 7%, Mo 4%, N 0.27%. PREN > 40. UNS S32750.

Typical service: Seawater injection and produced water treatment (offshore); Subsea control valve bodies and wellhead isolation; Desalination plant high-pressure piping valves

Also designated:S32750 [UNS]X2CrNiMoN25-7-4 [EN]1.4410 [EN]ISO 15156-3 Annex A, Table A.3 [ISO]

A890 Grade 5A

Duplex & Super Duplex

Super Duplex 2507 (Grade 5A Cast) - cast form.

Service temperature-46°C to +300°C

Nominal compositionC ≤ 0.03%, Mn ≤ 1.20%, Si ≤ 0.80%, Cr 24.00–26.00%, Ni 6.00–8.00%, Mo 3.00–5.00%, N 0.24–0.32%, Cu ≤ 0.50%

Typical service: Deepwater subsea valves - seawater injection and well-testing at high chloride, high pressure; Offshore produced water re-injection (PWRI) valves - H₂S + CO₂ + chloride environments; FGD (flue gas desulphurisation) slurry recirculation valves - high-Cl sulfate solution

Also designated:S32750 (wrought) [UNS]J93404 (cast) [UNS]1.4410 (X2CrNiMoN25-7-4) [EN]SAF 2507, Ferralium 255 [Trade names]

A182 F53

Duplex & Super Duplex

Super Duplex 2507 (F53) - forged form.

Service temperature-50°C to +300°C

Nominal compositionCr 24-26%, Ni 6-8%, Mo 3-5%, N 0.24-0.32%, Mn ≤ 1.2%, Si ≤ 0.8%. PREN = Cr + 3.3Mo + 16N, typically 42-45.

Typical service: Subsea wellhead and tree valves in aggressive sour/seawater service; Offshore desalination (SWRO) pump and valve trains at 600 bar; Seawater injection valves on floating production units (FPSO, FLNG)

Also designated:1.4410 X2CrNiMoN25-7-4 [EN]S32750 [UNS]SAF 2507, Ferrinox 255, Zeron 100 [Trade name]

Reviewed by Materials Engineering, Vajra Industrial SolutionsDiscipline: Valve Metallurgy & Materials SelectionLast reviewed: 20 June 2026

Connected Engineering

Materials

Super Duplex 2507

Need valves in S32750 / its ASTM equivalent?

We supply A182 F53 / UNS S32750 (Super Duplex 2507) / A890 Grade 5A / A182 F53 valves - the S32750 equivalent - with EN 10204 3.1 material certification. Share the datasheet for a 24-hour quote.

Request a Quote WhatsApp Call

Products

Browse All Valve Products

Engineering references

A182 F53 / UNS S32750 (Super Duplex 2507) full grade pageSuper Duplex 2507 A890 Grade 5A full grade pageSuper Duplex 2507 (Grade 5A Cast)Equivalence MatrixAll 43 grades across 7 systems Designation lookup directoryEvery foreign designation indexed