Corrosion-resistant nickel-chromium-molybdenum alloys
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United States of America Patent
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May 28, 1991
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app pub date -
Jan 26, 1990
filing date -
Apr 14, 1989
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Abstract
A homogenizaton heat treatment for enhancing crevice and pitting corrosion resistance minimizes the formation of Mu phase in nickel-base alloys of high combined percentages of chromium, e.g., 19 to 23% and molybdenum, e.g., 14 to 17%, particularly together with tungsten. Also described is an advantageous alloy composition containing less than 2.5% iron, low carbon and a titanium to carbon ratio greater than 1 which is particularly adapted to be effectively treated by the homogenization heat treatment.
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