Nickel 625 per AMS 5666 Nickel Alloy, Corrosion and Heat-Resistant, Bars, Forgings, Extrusions, and Rings, 62Ni – 21.5Cr – 9.0Mo – 3.65 (Cb [Nb] +Ta), Annealed
A nickel-chromium-molybdenum alloy with an addition of niobium that acts with the molybdenum to stiffen the alloy’s matrix and thereby provide high strength without a strengthening heat treatment. The alloy resists a wide range of severely corrosive environments and is especially resistant to pitting and crevice corrosion. Used in chemical processing, aerospace and marine engineering, pollutioncontrol equipment and nuclear reactors.
The AMS 5666 specification covers Nickel 625 corrosion and heat-resistant nickel alloy in the form of bars, forgings, extrusions, flash welded rings, and stock for forging, or flash welded rings.