Mitsubishi Jukogyo Kabushiki Kaisha

Hideo Nakamoto

Naohiko Ukawa

Ryuichiro Ebara

Tamotsu Yamada

Yasuo Nishimura

An austenitic stainless steel for use for high temperature concentrated sulfuric acid which comprises, on weight basis, 0.04% or less of C, 5-7% of Si, 2% or less of Mn, 15-25% of Cr, 4-24% of Ni, 0.01-1.07% of Pd and the rest consisting of Fe and unavoidable contaminant materials. By the incorporation of small amount of palladium in a basal austenitic stainless steel containing the essential three elements of Cr, Ni and Si, a superior corrosion resistance against highly concentrated high temperature sulfuric acid is attained.

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Hiroshima, Japan

Hideo Nakamoto