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K11597 — ASTM Equivalent

Holding a datasheet that specifies K11597 (UNS)? The valve-grade equivalent, its properties, and certified supply of the matching ASTM grade.

What is the ASTM equivalent of K11597?

K11597 is a UNS designation corresponding to ASTM A182 F11 (1.25Cr-0.5Mo Alloy Steel (F11)) 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 F11

Chrome-Moly / Alloy Steel

1.25Cr-0.5Mo Alloy Steel (F11) - forged form.

Service temperature-29°C to +540°C
Nominal compositionCr 1.0-1.5%, Mo 0.44-0.65%, C ≤ 0.15%, Mn 0.30-0.80%, Si 0.50-1.00%. Class 2: normalised and tempered.

Typical service: Boiler feed pump discharge block and check valves in power plants (350-450°C); Crude column overhead and HVGO circuit isolation valves in atmospheric distillation units; Hydroprocessing unit valve bodies in hydrogen-rich environments at moderate temperatures

Also designated:1.7335 13CrMo4-5 [EN]K11597 [UNS]P11 [DIN]T11 [DIN]
Reviewed by Materials Engineering, Vajra Industrial SolutionsDiscipline: Valve Metallurgy & Materials SelectionLast reviewed: 20 June 2026

Need valves in K11597 / its ASTM equivalent?

We supply A182 F11 valves - the K11597 equivalent - with EN 10204 3.1 material certification. Share the datasheet for a 24-hour quote.

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Engineering references

A182 F11 full grade page1.25Cr-0.5Mo Alloy Steel (F11)Equivalence MatrixAll 43 grades across 7 systemsDesignation lookup directoryEvery foreign designation indexed