Composite aluminum tread plate sheet
The invention relates to a tread plate product having an aluminum composite structure. The structure includes a core layer and at least one clad layer, wherein the core layer is an alloy of the AA5XXX series alloys in which the Mg content is 2% by weight or more and the clad layer(s) is made of an alloy of the AA3XXX series or AA5XXX series alloys, in which the Mg content is 1% by weight or less. The structure may be made in thin gauge while retaining or enhancing desirable mechanical properties.
1 . A tread plate product comprising an aluminum composite structure having a core layer and at least one clad layer wherein the core layer is an alloy selected from the group of alloys consisting of the 5XXX series alloys where the Mg content is 2% by weight or more and the at least one clad layer is selected from the group of alloys consisting of the 3XXX series and 5XXX series alloys where the Mg content is 1% by weight or less.
2 . The product of claim 1 wherein the composite structure comprises two clad layers with one clad layer on each side of the core layer.
3 . The product of claim 2 wherein the two clad layers are of the same composition.
4 . The product of claim 1 wherein the at least one clad layer comprises an alloy selected from the group consisting of AA3003, AA3005 and AA3105.
5 . The product of claim 1 wherein the clad layer is AA3003.
6 . The product of claim 1 wherein the clad layer is an alloy selected from the group consisting of AA5005 and AA5205.
7 . The product of claim 1 wherein the clad layer is AA5005.
8 . The product of claim 1 wherein the core layer comprises an alloy selected from the group consisting of AA5052, AA5083, AA5383, AA5086, AA5186, AA5154, AA5254, AA5454 and AA5754
9 . The product of claim 1 wherein the core layer is selected from the group consisting of AA5052, AA5056, AA5083 and AA5383.
10 . The product of claim 1 wherein the core layer is AA5052.
11 . The product of claim 1 having a thickness of less than 1.3 mm.
12 . The product of claim 1 having a thickness of 1 mm or less.
13 . The product of claim 1 having a regular pattern of raised or embossed features on at least one surface thereof.
14 . A tread plate product comprising an aluminum composite structure having a core layer and at least one clad layer wherein the core layer is an alloy selected from the group of alloys consisting of the 5XXX series alloys where the Mg content is >2% by weight and the at least one clad layer is selected from the group of alloys consisting of the 3XXX series and 5XXX ( series alloys where the Mg content is <1% by weight.