6061 aluminium alloy -
6061 aluminium alloy (Unified Numbering System (UNS) designation A96061) is a precipitation-hardened aluminium alloy, containing magnesium and silicon as its major alloying elements. Originally called \"Alloy 61S\", it was developed in 1935. [2] It has good mechanical properties, exhibits good weldability, and is very commonly extruded (second in popularity only to 6063).