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X2CrNiMoN25-7-4 — ASTM Equivalent

Holding a datasheet that specifies X2CrNiMoN25-7-4 (EN)? The valve-grade equivalent, its properties, and certified supply of the matching ASTM grade.

What is the ASTM equivalent of X2CrNiMoN25-7-4?

X2CrNiMoN25-7-4 is a EN designation corresponding to ASTM A182 F53 / UNS S32750 (Super Duplex 2507) (Super Duplex 2507) and A890 Grade 5A (Super Duplex 2507 (Grade 5A Cast)) 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]
Reviewed by Materials Engineering, Vajra Industrial SolutionsDiscipline: Valve Metallurgy & Materials SelectionLast reviewed: 20 June 2026

Connected Engineering

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Super Duplex 2507

Need valves in X2CrNiMoN25-7-4 / its ASTM equivalent?

We supply A182 F53 / UNS S32750 (Super Duplex 2507) / A890 Grade 5A valves - the X2CrNiMoN25-7-4 equivalent - with EN 10204 3.1 material certification. Share the datasheet for a 24-hour quote.

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Engineering references

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