Feb 13, 2019 · It is alsomonly used in sheet metal applications such as gutters, downspouts, roofing, and siding. The most widely used in buildings is the 3000 series “aluminium-manganese alloys,” of which the 3003, 3004, 3005, 3103 and 3105 alloys are used in large quantities, because the manganese content in the aluminium-manganese alloy is stable.
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