Silicon modified low chromium ferritic alloy for high temperatur

Details Silicon modified low chromium ferritic alloy for high temperatur Silicon modified low chromium ferritic alloy for high temperatur

1987-09-10

1988-12-13

Yee, Deborah

Alloys or metallic compositions

Ferrous

Chromium containing, but less than 9 percent

420112, 420117, 420118, 75246, 148333, C22C 3834

Patent

active

047909773

ABSTRACT:
A ferritic alloy steel having good creep strength and cyclic oxidation resistance at elevated temperatures up to 982.degree. C. (1800.degree. F.) with an optional final anneal at 1010.degree.-1150.degree. C. (1850.degree.-2100.degree. F.) consisting essentially of from about 0.01% to about 0.30% carbon, about 2% maximum manganese, greater than 2.35% to about 4% silicon, about 3% to about 7% chromium, about 1% maximum nickel, about 0.15% maximum nitrogen, less than 0.3% aluminum, about 2% maximum molybdenum, at least one element selected from the group of niobium, titanium, tantalum, vanadium and zirconium in an amount up to 1.0% and the balance essentially iron.

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