Aluminum alloy for cylinder head and method of manufacturing the same

A method of producing an aluminum alloy for a cylinder head used in a vehicle engine comprising:

• casting molten composition comprising 2 to 3% of Si, 2.5 to 3% of Cu, 0.01% or less (excluding 0%) of Zn, 0.15% or less (excluding 0%) of Fe, 0.02% or less (excluding 0%) of Mn, 0.1 to 0.3% of Mg, 0.01% or less (excluding 0%) of Ni, 0.02% or less (excluding 0%) of Ti, 0.1% or less (excluding 0%) of Zr, the balance of Al and inevitable impurities to produce an article in the form of a cylinder head;
• and
• conducting solid solution treatment on the article and conducting aging heat treatment such that an AlCuMgSi-based crystal is formed in an amount of 0.3 to 0.9% and an Al2Cu-based precipitate is formed in an amount of 3.3 to 4.0%,
• wherein percentage (%) is based on weight.