Incoloy 825 is a nickel-iron-chromium alloy with additions of molybdenum,  copper and titanium. This nickel steel alloy’s chemical composition is designed  to provide exceptional resistance to many corrosive environments. It is similar  to alloy 800 but has improved resistance to aqueous corrosion. It has excellent  resistance to both reducing and oxidizing acids, to stress-corrosion cracking,  and to localized attack such as pitting and crevice corrosion.