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    Roping and Intergranular Corrosion of 430 Stainless Steel

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    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.

    Author Information:

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

    Committee/Subcommittee: A01.14

    DOI: 10.1520/STP43760S