For precipitation hardening, the metal should be placed in 320 degrees F for 18 hours, air cooled, then placed in 350 degree F for eight hours, and then air cooled
Ukuze imvula iqine, insimbi kufanele ibekwe kuma-degree angama-320 F amahora ayi-18, kupholiswe umoya, bese kubekwa ku-350 degree F amahora ayisishiyagalombili, bese kupholiswa nomoya futhi.