ACID AND ALKALI RESISTANT NICKEL-CHROMIUM-MOLYBDENUM-COPPER ALLOY

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PROBLEM TO BE SOLVED : To provide an alloy that has resistance to 70% sulfuric acid at 93°C and 50% sodium hydroxide at 121°C and can be made into a rolled member. SOLUTION : An alloy contains, by weight percent, 27 to 33 chromium, 4.9 to 7.8 molybdenum, greater than 3.1 but no more than 6.0 copper, up to 3.0 iron, 0.3 to 1.0 manganese, 0.1 to 0.5 aluminum, 0.1 to 0.8 silicon, 0.01 to 0.11 carbon, up to 0.13 nitrogen, up to 0.05 magnesium, up to 0.05 rare earth elements, with a balance of nickel and impurities. Titanium or another MC carbide forming elements can be added to enhance thermal stability of the alloy. COPYRIGHT : (C)2014, JPO&INPIT