Patent ID: 6296805
Filing Date: 2001-10-02
Classification: C21D,C22C,Y10S,Y10T

Abstract:
A hot-rolled coated steel sheet comprising a hot-rolled steel sheet coated with an aluminum or aluminum alloy coating, wherein the steel in the sheet comprises the following composition by weight:0.15%<carbon<0.5%0.5%<manganese<3%0.1%<silicon<0.5%0.01%<chromium<1%titanium<0.2%aluminum<0.1%phosphorus<0.1%sulfur<0.05%0.0005%<boron<0.08%, the remainder being iron and impurities inherent in processing, and the steel sheet has a very high mechanical resistance after thermal treatment and the aluminum or aluminum alloy coating provides a high resistance to corrosion of the steel sheet.