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.

1 : Nickel-molybdenum-iron alloy with high resistance relative 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   max. 0.5% copper   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 . Alloy according to  claim 1 , with (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   max. 0.5% copper   max. 0.01% carbon   max. 0.1% silicon   max. 0.02% phosphorus   max. 0.01% sulfur   max. 1.0% cobalt.   
     
     
         3 . Alloy according to  claim 1 , with (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   max. 0.3% copper   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 . Use of the alloy according to  claim 1  for components with high corrosion resistance toward reducing media, especially hot moderately concentrated sulfuric acid and hydrochloric acid solutions. 
     
     
         5 . Use of the alloy according to  claim 1  for components in chemical plants. 
     
     
         6 . Use of the alloy according to  claim 1  as a weld filler of like material and for welding of nickel-molybdenum alloys. 
     
     
         7 . Use of the alloy according to  claim 1  as a wrought material for the production of sheets, strips, wires, bars, forgings and tubes and as castings.