Low-density steel having good drawability
AssigneeArcelorMittal France
InventorsAstrid Perlade, Xavier Garat, Jean-Louis Uriarte, Olivier Bouaziz, Josee Drillet
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Abstract
The invention relates to a hot-rolled ferritic steel sheet, the composition of the steel of which comprises, the contents being expressed by weight: 0.001≦C≦0.15%, Mn≦1%, Si≦1.5%, 6%≦Al≦10%, 0.020%≦Ti≦0.5%, S≦0.050%, P≦0.1%, and, optionally, one or more elements chosen from: Cr≦1%, Mo≦1%, Ni≦1%, Nb≦0.1%, V≦0.2%, B≦0.010%, the balance of the composition consisting of iron and inevitable impurities resulting from the smelting, the average ferrite grain size dIV measured on a surface perpendicular to the transverse direction with respect to the rolling being less than 100 microns.
Claims16
A hot-rolled ferritic steel sheet, the composition of the steel of which comprises, the contents being expressed by weight:
- 0.001≦C≦0.15%
- Mn≦1%
- Si≦1.5%
- 6%≦Al≦10%
- 0.020%≦Ti≦0.5%
- S≦0.050%
- P≦0.1%
- and, optionally, one or more elements chosen from:
- Cr≦1%
- Mo≦1%
- Ni≦1%
- Nb≦0.1%
- V≦0.2%, and
- B≦0.010%, and
- the balance of the composition consisting of iron and inevitable impurities resulting from the smelting, the average ferrite grain size dIV, measured on a surface perpendicular to the transverse direction with respect to the rolling being less than 100 microns.
Dependencies are inferred from the claim text.