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Materials Research

Print version ISSN 1516-1439On-line version ISSN 1980-5373


DE MICHELI, Lorenzo; AGOSTINHO, Silvia Maria Leite; TRABANELLI, Giordano  and  ZUCCHI, Fabrizio. Susceptibility to Stress Corrosion Cracking of 254SMO SS. Mat. Res. [online]. 2002, vol.5, n.1, pp.63-69. ISSN 1516-1439.

The susceptibility to stress corrosion cracking (SCC) of solubilized and sensitized 254SMO SS was studied in sodium chloride, and sodium fluoride solutions at 80 °C and sulfuric acid solutions in presence of sodium chloride at 25 °C. The influence of salt concentration, pH values and the addition of thiosulfate was examined. The susceptibility to SCC was evaluated by Slow Strain Rate Tests (SSRT), at 1.5 x 10-6 s-1 strain rate. The behavior of 254SMO was compared to those of AISI 316L SS and Hastelloy C276. 254SMO showed an excellent resistance to SCC in all conditions, except in the more acidic solutions (pH £ 1) where, in the sensitized conditions, intergranular stress corrosion cracking occurred.

Keywords : stainless steel; stress corrosion cracking; chloride and fluoride.

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