SOHIC staggered small cracks formed approximately perpendicular to the principal stress (residual or applied) resulting in a “ladder-like” crack array linking (sometimes small) pre-existing HIC cracks Note 1 to entry: The mode of cracking can be categorized as SSC caused by a combination of external stress and the local strain around hydrogen-induced cracks. SOHIC is related to SSC and HIC/SWC. It has been observed in parent material of longitudinally welded pipe and in the heat-affected zone (HAZ) (3.10) of welds in pressure vessels. SOHIC is a relatively uncommon phenomenon usually associated with low-strength ferritic pipe and pressure vessel steels.
SOHIC
мале степенасте прслине настале у правцу приближно управном на главни напон (заостали или примењени), што је резултирало низом пукотина налик „мердевинама” које повезују (понекад мале) HIC прслине још у стадијуму настајања