Machining Aluminum Engine Blocks Engine Builder
Jul 27, 2017 0183 32Most cast aluminum engine blocks are made from one of three alloys: 319, A356 or A357. The 319 alloy is 85.8 to 91.5 aluminum, 5.5 to 6.5 silicon, 3 to 4 copper, 0.35 nickel, 0.25 titanium, 0.5 manganese, 1 iron, 1 zinc and 0.1 magnesium. The alloy is given a T5 heat treatment to harden and strengthen the metal before the block is ...