Patents Assigned to ArcelorMittal Atlantique et Lorraine
  • Coated hot- and cold-rolled steel sheet comprising a very high resistance after thermal treatment
    Patent number: RE44153
    Abstract: Hot-rolled steel sheet which then can be cold-rolled, coated, the steel in the sheet having 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, the sheet ensuring a very high mechanical resistance after thermal treatment and the aluminum-based coating ensuring a high resistance to corrosion.
    Type: Grant
    Filed: August 8, 2011
    Date of Patent: April 16, 2013
    Assignee: ArcelorMittal Atlantique et Lorraine
    Inventors: Jean-Pierre Laurent, Jean-Paul Hennechart, Dominique Spehner, Jacques Devroc
  • Coated hot- and cold-rolled steel sheet comprising a very high resistance after thermal treatment
    Patent number: RE44940
    Abstract: Hot-rolled steel sheet which then can be cold-rolled, coated, the steel in the sheet having 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, the shoot ensuring a very high mechanical resistance after thermal treatment and the aluminum-based coating ensuring a high resistance to corrosion.
    Type: Grant
    Filed: April 15, 2013
    Date of Patent: June 10, 2014
    Assignees: ArcelorMittal France, ArcelorMittal Atlantique et Lorraine
    Inventors: Jean-Pierre Laurent, Jean-Paul Hennechart, Dominique Spehner, Jacques Devroc