High-tensile, cold formable steel and flat steel product composed of such steel

摘要

High-strength cold- molded steel comprises carbon (0.1-1 wt.%); manganese (10-25 wt.%); silicon (up to 0.5 wt.%); aluminum (0.3-2 wt.%); chromium (1.5-3.5 wt.%); sulfur (less than 0.03 wt.%); phosphorus (less than 0.08 wt.%); nitrogen (less than 0.1 wt.%); molybdenum (less than 2 wt.%); boron (less than 0.01 wt.%); nickel (less than 8 wt.%); copper (less than 5 wt.%); calcium (up to 0.015 wt.%); vanadium (0.01-0.5 wt.%) or niobium (0.01-0.5 wt.%); optionally titanium (0.01-0.5 wt.%); and iron and unavoidable pollutants (balance). An independent claim is included for flat steel products produced from the steel.