Automobile body part
AssigneeNovelis Inc.
InventorsJuergen Timm, Corrado Bassi
Life of this patent
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Abstract
The present invention relates to an automotive clad sheet product comprising a core layer and at least one clad layer wherein the core comprises an alloy of the following composition in weight %: Mg 0.45-0.8, Si 0.45-0.7, Cu 0.05-0.25, Mn 0.05-0.2, Fe up to 0.35, other elements (or impurities) <0.05 each and <0.15 in total, balance aluminum; and the at least one clad layer comprises an alloy of the following composition in weight %: Mg 0.3-0.7, Si 0.3-0.7, Mn up to 0.15, Fe up to 0.35, other elements (impurities) <0.05 each and <0.15 in total, balance aluminum. The clad automotive sheet product provides excellent hemmabtlity which does not substantially change over time and yet also provides a good age-hardening response after bake hardening.
Claims19
An automotive clad sheet product comprising a core layer and at least one clad layer wherein the core layer comprises an alloy of the following composition in weight %:
- Mg 0.45-0.7
- Si 0.45-0.7
- Cu 0.05-0.25
- Mn 0.05-0.2
- Fe up to 0.35
- with other elements <0.05 each and <0.15 in total, and the balance aluminium, wherein the weight percentages of Mg and Si in the core layer are balanced;
- and
- the at least one clad layer comprises an alloy of the following composition in weight %:
- Mg 0.3-0.7
- Si 0.3-0.7
- Mn up to 0.15
- Fe up to 0.35
- with other elements <0.05 each and <0.15 in total, and the balance aluminium.
An automotive clad sheet product comprising a core layer and at least one clad layer wherein the core layer comprises an alloy of the following composition in weight %:
- Mg 0.45-0.7
- Si 0.45-0.7
- Cu 0.05-0.25
- Mn 0.05-0.2
- Fe up to 0.35
- with other elements <0.05 each and <0.15 in total, and the balance aluminium;
- and
- the at least one clad layer comprises an alloy of the following composition in weight %:
- Mg 0.3-0.7
- Si 0.3-0.7
- Mn up to 0.15
- Fe up to 0.35
- with other elements <0.05 each and <0.15 in total, and the balance aluminium,
- wherein the bending factor, as measured according to ASTM E290 is below 0.3 after 6 months natural ageing.
Dependencies are inferred from the claim text.