SEDL / STP / STP369-EB / STP43760S

Roping and Intergranular Corrosion of 430 Stainless Steel

Parker, E. A.
Service metallurgist, Jones & Laughlin Steel Corp., Louisville, Ohio.

Pages: 8    Published: Jan 1965

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Abstract

Heat treating Type 430 stainless steel above 1650 prior to cold rolling in order to produce a lower roped steel results in sensitization of the steel on fast cooling. This sensitization causes rapid intergranular corrosion in hot nitric-hydrofluoric acid solutions unless the steel is desensitized prior to immersion. The time-temperature relationship for desensitization is given. In addition, a possible mechanism for sensitization-desensitization in ferritic stainless steels is presented.