Ferritic steel alloy with improved high temperature properties

Details Ferritic steel alloy with improved high temperature properties Ferritic steel alloy with improved high temperature properties

C - Chemistry, Metallurgy

22

C

75/134, 148/34.4

C22C 38/06 (2006.01) C22C 38/26 (2006.01) C22C 38/28 (2006.01)

Patent

CA 1171305

ABSTRACT OF THE DISCLOSURE A ferritic steel having improved creep or sag resistance and oxidation resistance at temperature ranging from about 732° to 1093°C after a final anneal at 1010° to 1120°C, together with good weldability, the steel con- sisting essentially of, by weight percent, from 0.01% to 0.06% carbon, about 1% maximum manganese, about 2% maximum silicon, about 1% to about 20% chromium, about 0.5% maximum nickel, about 0.5 to 2% aluminum, about 0.01% to 0.05% nitrogen, 1.0% maximum titanium, with a minimum titanium content of 4 times the percent carbon plus 3.5 times the percent nitrogen, about 0.1% to 1.0% columbium with the sum total of titanium plus columbium not ex- ceeding about 1.2%, and remainder essentially iron. In the form of cold reduced strip and sheet stock the steel has particular utility in motor vehicle components.

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