Designation Cross-Reference

X10CrMoVNb9-1 — ASTM Equivalent

Holding a datasheet that specifies X10CrMoVNb9-1 (EN wrought)? The valve-grade equivalent, its properties, and certified supply of the matching ASTM grade.

What is the ASTM equivalent of X10CrMoVNb9-1?

X10CrMoVNb9-1 is a EN wrought designation corresponding to ASTM A182 F91 (P91 Chrome-Moly (9Cr-1Mo-V)) 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 F91

Chrome-Moly / Alloy Steel

P91 Chrome-Moly (9Cr-1Mo-V) - forged form.

Service temperature-18°C to +650°C

Nominal compositionC 0.08–0.12%, Cr 8.0–9.5%, Mo 0.85–1.05%, V 0.18–0.25%, Nb 0.06–0.10%, N 0.03–0.07%. Martensitic.

Typical service: Supercritical power plant steam (>22 MPa, >560°C); Ultra-supercritical (USC) steam (>600°C); Hydrogen service at elevated temperature

Also designated:X10CrMoVNb9-1 [EN wrought]1.4903 [EN wrought]X10CrMoVNb9-1 [DIN]STPA92 [JIS]

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

Connected Engineering

Materials

A217 WC9 Chrome-Moly

Need valves in X10CrMoVNb9-1 / its ASTM equivalent?

We supply A182 F91 valves - the X10CrMoVNb9-1 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 F91 full grade pageP91 Chrome-Moly (9Cr-1Mo-V)Equivalence MatrixAll 43 grades across 7 systems Designation lookup directoryEvery foreign designation indexed