HIGH-TEMPERATURE ALLOY Russian patent published in 1997 - IPC

FIELD: metallurgy, particularly, high-temperature alloys being used for manufacturing of reaction tubes of devices which are used for production of ammonium and methanol and operate at 700-1000 C and at pressure up to 46 atm. SUBSTANCE: alloy comprises, mas.%: carbon, 0.30-0.38; silicium, 0.60-0.90; manganese, 0.50-1.00; chromium, 23.0-25.0; nickel, 24.0-26.0; niobium, 1.30-1.70; sulfur, not more 0.03; phosphorous, not more 0.03; lead, not more 0.01; tin, not more 0.01; arsenic, not more 0.01; zinc, not more 0.01; molybdenum, not more 0.5; copper, not more 0.2; ferrum, the balance. EFFECT: improved quality of desired product. 2 tbl