A 6XXX ALLOY FOR HIGH STRENGTH EXTRUDED PRODUCTS WITH HIGH PROCESSABILITY
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United States of America
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Mar 13, 2025
app pub date -
May 24, 2022
filing date -
May 24, 2022
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Abstract
The invention concerns an improved alloy to obtain AA6xxx alloy extrusions with high strength, typically having an ultimate tensile strength higher than 390 MPa, and high processability, in particular with a high productivity, as well as high surface quality and high corrosion resistance. In particular, the alloy of the invention contains, in wt. %, Si 0.6-0.9, Mg 0.55-0.76, Cu 0.65-0.9, Mn 0.4-0.7, Cr 0.05-0.2, Zr 0.10-0.19, Fe 0.05-0.5, Zn≤1.0, V≤0.10, Ti≤0.10, other elements <0.05 each and <0.15 total, rest aluminium. The extruded profiles of the invention are advantageously used as automotive components such as crash boxes, a bumpers, a side impact beams or side sills.
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