Capital Aluminium Extrusions Limited

Heat treatment is often used to improve the aluminium’s strength and hardness. Our 5 metre heat treatment facility, stretch and de-twist machine enables Capalex to supply the most demanding aerospace specification material. We also have a coiling capability for certain lighter extrusions in lengths up to 30 metres. Aluminium Tempers ‘T’ – Heat treated (ie. For age hardening alloys) the ‘T’ will always be followed by one or more digits. F Fabricated T1 Cooled from an elevated temperature shaping process and naturally aged. T2 Cooled from an elevated temperature shaping process, cold worked and naturally aged. T3 Solution heat-treated, cold worked and naturally aged. T4 Solution treated and naturally aged T5 Cooled from an elevated temperature shaping process and artificially aged. T6 Solution heat-treated then artificially aged. T7 Solution heat-treated and then artificially aged. T8 Solution heat-treated, cold worked and artificially aged. T9 Solution heat-treated artificially aged and cold worked.