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

1979-08-06

1981-04-14

Rutledge, L. Dewayne

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

148 12EA, 148 36, 148 37, C22C 3806, C22C 3826, C22C 3828

Patent

active

042617391

ABSTRACT:
A ferritic steel having improved creep or sag resistance and oxidation resistance at temperatures ranging from about 732.degree. to 1093.degree. C. after a final anneal at 1010.degree. to 1120.degree. C., together with good weldability, the steel consisting essentially of, by weight percent, from about 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 0.1% 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 exceeding 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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