Metallic nickel-based acid-resistant material

Abstract

A weld filler includes 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. The weld filler can be welded to fill a joint.

What is claimed is: 
     
         1 . A weld filler for welding, the weld filler comprising a nickel-molybdenum-iron alloy 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;   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 weld filler according to  claim 1 , wherein the nickel-molybdenum-iron alloy consists of 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; and   max. 1.0% cobalt.   
     
     
         3 . The weld filler according to  claim 1 , wherein the nickel-molybdenum-iron alloy consists of 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; and   max. 1.0% cobalt.   
     
     
         4 . The weld filler according to  claim 1 , wherein the copper is present in a range of from 0.01% to 0.5%. 
     
     
         5 . A method for welding, the method comprising steps of:
 (a) providing a weld filler comprising a nickel-molybdenum-iron alloy 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; 
 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; and 
   (b) welding a joint in that the weld filler is used to fill the joint.   
     
     
         6 . The method according to  claim 5 , wherein the welding occurs at the joint of a material comprising a nickel-molybdenum-iron alloy. 
     
     
         7 . The method according to  claim 5 , wherein the nickel-molybdenum-iron alloy consists of 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; and   max. 1.0% cobalt.   
     
     
         8 . The method according to  claim 5 , wherein the nickel-molybdenum-iron alloy consists of 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; and   max. 1.0% cobalt.   
     
     
         9 . The method according to  claim 5 , wherein the copper is present in a range of from 0.01% to 0.5%.