Valves in Hastelloy© B, B2, B3, C, C22 and C276


The patent holder to Hastelloy©, Haynes Corporation, comments that Hastelloy© can be considered to have superceded both Inconel© and Incoloy© for most petrochemical processes. Hastelloy© is suitable for extreme temperatures and is highly resistant to crevice corrosion. The alloy comes in many grades, as reflected in the table below.


Hastelloy© material specification and equivalents

Cast designation A494 N7M, CW12MW, CW6M, CX2MW
ASTM specification B564 and B622
European (DIN) Werkstoff number 2.4617, 2.4600, 2.4602, 2.4819, 2.4610
Unified Numbering System (UNS) N10276, N10665, N06022 and S33205
Other designations Hastelloy© B, B2, B3, C, C22 and C276

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