Steel, Sheet Steel Product and Process for Producing a Sheet Steel Product
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United States of America Patent
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Jun 5, 2013
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Jun 5, 2012
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Abstract
The invention relates to a steel and to a flat steel product produced therefrom that have optimized mechanical properties and at the same time can be produced at low cost, without having to rely for this on expensive alloying elements that are subject to great fluctuations with regard to their procurement costs. The steel and the flat steel product have for this purpose the following composition according to the invention (in % by weight): C: 0.12-0.18%; Si: 0.05-0.2%; Mn: 1.9-2.2%; Al: 0.2-0.5%; Cr: 0.05-0.2%; Nb: 0.01-0.06%; the remainder Fe and impurities that are unavoidable for production-related reasons, which include contents of phosphorus, sulfur, nitrogen, molybdenum, boron, titanium, nickel and copper as long as the following respectively apply for their contents: P: ≦0.02%, S: ≦0.003%, N: ≦0.008%, Mo: ≦0.1%, B: ≦0.0007%, Ti: ≦0.01%, Ni: ≦0.1%, Cu: ≦0.1%. Similarly, the invention relates to a method for producing a flat steel product that consists of a steel according to the invention.
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