Automotive aluminum industry chain

Automotive aluminum industry chain: casting + rolling + extrusion + forging

Automotive aluminum alloy mainly includes casting, rolling, extrusion and forging four categories, of which cast aluminum alloy is mainly used in automobile engine block, cylinder head, clutch housing, bumper, wheel, engine bracket and other parts; Rolled aluminum plate and foil is mainly used for body panels, door skins, heat dissipation systems, battery shells, battery foils, etc.; Extruded profiles are mainly used for anti-collision beams, suspension parts, various brackets, battery trays, etc.; Forged parts are mainly used for wheels, bumpers, crankshafts, etc. From the perspective of the proportion of automotive aluminum, casting accounted for 66%, rolling accounted for 18%, extrusion accounted for 11%, forging accounted for 5% in 2016, compared with the change in proportion in 2012, casting decreased by about 7pct, rolling increased by 5pct, extrusion increased by 1pct, and forging increased by 2pct. The reason is that the high-strength and high-toughness automotive aluminum used for rolling is more suitable for the upgrading of the automobile lightweight process, so the proportion of important components such as body structural parts has increased significantly.

Lightweight and new energy co-drive, automotive aluminum demand CAGR9%

Due to differences in body structure, the amount of aluminum used in new energy vehicles has increased significantly. According to DuckerFrontier research, the use of aluminum alloy in new energy vehicles is 41.6% more than that of traditional fuel vehicles. Among them, due to the reduction of fuel vehicle engines, transmission systems and other components, the amount of aluminum used in fuel vehicles was reduced by 24.0%, 18.9% and 2.2% respectively. In pure electric vehicles, due to the more aluminum alloy used in the power system and body structural parts, the amount of aluminum used in the power transmission system, structural parts and other parts increased the amount of aluminum used in bicycles by 10.3%, 48.7% and 2.3% respectively. From the perspective of automotive aluminum types, the proportion of aluminum used in traditional die-casting decreased, and the proportion of rolled strip foil and extruded profiles increased relatively.