METALLIC NICKEL-BASED ACID-RESISTANT MATERIAL
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 . 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%.