| 摘要 |
<p>A ferritic steel having improved creep or sag resistance and oxidation resistance at temperature 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 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 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.</p> |
