Designation Cross-Reference

B564 N10276 — ASTM Equivalent

Holding a datasheet that specifies B564 N10276 (CW12MW / Hastelloy C)? The valve-grade equivalent, its properties, and certified supply of the matching ASTM grade.

What is the ASTM equivalent of B564 N10276?

B564 N10276 is a CW12MW / Hastelloy C designation corresponding to ASTM A494 CW6MC / CW12MW (Hastelloy C-276 / Inconel 625 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.

A494 CW6MC / CW12MW

Nickel Alloys

Hastelloy C-276 / Inconel 625 Cast - cast form.

Service temperature-196°C to +1040°C

Nominal compositionCW6MC: Ni ≥ 58%, Cr 20–23%, Mo 8–10%, Nb+Ta 3.15–4.15%. CW12MW (C-type): Ni ≥ 54%, Cr 15.5–17.5%, Mo 16–18%, W 3.75–5.25%.

Typical service: Sulphuric acid (all concentrations and temperatures); Hydrochloric acid (all concentrations); Hydrofluoric acid (with care)

Also designated:UNS N06625, ASTM B564 N06625 (forged) [CW6MC / Alloy 625]UNS N10276, ASTM B574 [CW12MW / Hastelloy C]B564 N10276 [CW12MW / Hastelloy C]

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

Connected Engineering

Materials

Inconel 625 Hastelloy C-276

Need valves in B564 N10276 / its ASTM equivalent?

We supply A494 CW6MC / CW12MW valves - the B564 N10276 equivalent - with EN 10204 3.1 material certification. Share the datasheet for a 24-hour quote.

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Engineering references

A494 CW6MC / CW12MW full grade pageHastelloy C-276 / Inconel 625 Cast Equivalence MatrixAll 43 grades across 7 systems Designation lookup directoryEvery foreign designation indexed