Official Answer
Answer
SCC is a failure mechanism requiring a susceptible material, a tensile stress, and a corrosive environment (often chlorides). In spiral rings, the residual stresses from coiling, combined with the operating load, provide the stress component. The failure appears as a series of branched, fine cracks that can be seen under magnification. Unlike standard corrosion, there may be very little 'rust' or surface damage. For subsea applications, shifting from 302 Stainless to a higher-molybdenum alloy like 316 Stainless or a Nickel-alloy like Inconel 718 is the standard engineering solution to eliminate SCC.
