Metallic nickel-based acid-resistant material

Abstract

A nickel-molybdenum-iron alloy with high corrosion resistance with respect to reducing media at high temperatures, consisting of (in % by mass): 61 to 63% nickel, 24 to 26% molybdenum, 10 to 14% iron, 0.20 to 0.40% niobium, 0.1 to 0.3% aluminum, 0.01 to 1.0% chromium, 0.1 to 1.0% manganese, at most 0.5% copper, at most 0.01% carbon, at most 0.1% silicon, at most 0.02% phosphorus, at most 0.01% sulphur, at most 1.0% cobalt, and further smelting-related impurities.

What is claimed is: 
     
         1 . A casting comprising a nickel-molybdenum-iron alloy comprising in % by mass
 61 to 63% nickel   24 to 26% molybdenum   10 to 14% iron   0.20 to 0.40% niobium   0.1 to 0.3% aluminum   0.01 to 1.0% chromium   0.1 to 1.0% manganese   copper, the copper being present to a max. of 0.5%   max. 0.01% carbon   max. 0.1% silicon   max. 0.02% phosphorus   max. 0.01% sulfur   max. 1.0% cobalt   and further impurities from smelting.   
     
     
         2 . The casting according to  claim 1 , wherein the nickel-molybdenum-iron alloy comprises in % by mass
 61.5 to 62.5% nickel   24.5 to 26.0% molybdenum   10.5 to 13.5% iron   0.2 to 0.4% niobium   0.1 to 0.3% aluminum   0.01 to 1.0% chromium   0.1 to 0.8% manganese   copper, the copper being present to a max. of 0.5%   max. 0.01% carbon   max. 0.1% silicon   max. 0.02% phosphorus   max. 0.01% sulfur   max. 1.0% cobalt.   
     
     
         3 . The casting according to  claim 1 , wherein the nickel-molybdenum-iron alloy comprises in % by mass
 61.5 to 62.5% nickel   24.8 to 26.0% molybdenum   10.5 to 12.5% iron   0.2 to 0.4% niobium   0.1 to 0.3% aluminum   0.01 to 0.9% chromium   0.1 to 0.5% manganese   copper, the copper being present to a max. of 0.3%   max. 0.008% carbon   max. 0.08% silicon   max. 0.015% phosphorus   max. 0.008% sulfur   max. 0.02% nitrogen   max. 0.012% magnesium   max. 1.0% cobalt.   
     
     
         4 . The casting according to  claim 1 , wherein the copper is present in a range of from 0.01% to 0.5%. 
     
     
         5 . A wrought material comprising a nickel-molybdenum-iron alloy comprising in % by mass
 61 to 63% nickel   24 to 26% molybdenum   10 to 14% iron   0.20 to 0.40% niobium   0.1 to 0.3% aluminum   0.01 to 1.0% chromium   0.1 to 1.0% manganese   copper, the copper being present to a max. of 0.5%   max. 0.01% carbon   max. 0.1% silicon   max. 0.02% phosphorus   max. 0.01% sulfur   max. 1.0% cobalt   and further impurities from smelting.   
     
     
         6 . The wrought material according to  claim 5 , wherein the nickel-molybdenum-iron alloy comprises in % by mass
 61.5 to 62.5% nickel   24.5 to 26.0% molybdenum   10.5 to 13.5% iron   0.2 to 0.4% niobium   0.1 to 0.3% aluminum   0.01 to 1.0% chromium   0.1 to 0.8% manganese   copper, the copper being present to a max. of 0.5%   max. 0.01% carbon   max. 0.1% silicon   max. 0.02% phosphorus   max. 0.01% sulfur   max. 1.0% cobalt.   
     
     
         7 . The wrought material according to  claim 5 , wherein the nickel-molybdenum-iron alloy comprises in % by mass
 61.5 to 62.5% nickel   24.8 to 26.0% molybdenum   10.5 to 12.5% iron   0.2 to 0.4% niobium   0.1 to 0.3% aluminum   0.01 to 0.9% chromium   0.1 to 0.5% manganese   copper, the copper being present to a max. of 0.3%   max. 0.008% carbon   max. 0.08% silicon   max. 0.015% phosphorus   max. 0.008% sulfur   max. 0.02% nitrogen   max. 0.012% magnesium   max. 1.0% cobalt.   
     
     
         8 . The wrought material according to  claim 5 , wherein the copper is present in a range of from 0.01% to 0.5%.