Coated hot- and cold-rolled steel sheet comprising a very high resistance after thermal treatment
AssigneeSollac
InventorsJean-Pierre Laurent, Jean-Paul Hennechart, Dominique Spehner, Jacques Devroc
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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.
Claims16
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.
Dependencies are inferred from the claim text.