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Coated hot- and cold-rolled steel sheet comprising a very high resistance after thermal treatment

DC CAFC
  • US 6,296,805 B1
  • Filed: 07/09/1999
  • Issued: 10/02/2001
  • Est. Priority Date: 07/09/1998
  • Status: Expired due to Term
First Claim
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1. 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.

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