High nickel-based alloy inconel

Not all nickel-based alloys are used for high-temperature applications the monels and some solid-solution inconels are the most notable exceptions. 

The substrate is most likely to be austenitic or ferritic stainless steel, high-alloy steels, nickel-base alloys (e.g., Inconels), or cast grades of Stellite (Co-Cr-W-C) materials. 

Nickel-based alloys. Nickel-based alloys such as Inconel 625, Hastelloys C-276 and C-22, and titanium are not subject to pitting or crevice corrosion in low-velocity seawater, nor do they suffer impingement attack at high velocity. However, price limits their use to special applications in seawater systems. 

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