Aluminum sheet D16T, Dnipropetrovsk region.

Sheet aluminum - flat rolled aluminum and its alloys according to GOST and Eurostandards.
It comes in different thicknesses from 0.5 to 10 mm.
A sheet with a thickness of 12 mm is usually called an aluminum plate.
Sheet aluminum is valued for its plasticity, lightness,
corrosion resistance, heat and electrical conductivity.
These properties allow the aluminum sheet to be used in all areas of industry.(//tractor-service.com)

D16 (an analogue of 2024T351) is an alloy of aluminum with copper. Such alloys are called durals, and durals
are used as structural alloys in the aviation and space industry,
thanks to their strength and relative lightness. The alloy is classified as durable
thermosetting, but not intended for welding. But it can be welded by spot welding,
although in most cases the parts from it are fastened with the help of fasteners.