Effects of multi-artificial aging on mechanical properties of low pressure casting A356.2 aluminum alloy wheel were investigated. The results show that tensile strength

yield strength and hardness are slightly improved

however

the elongation is decreased in multi-artificial aging alloy. The fluctuating amplification of mechanical properties is weakened with increasing in artificial aging times

so the microstructure tends to stable. After T6 heat treatment

although coarse grain size in A356.2 alloy can affect the Absence of yield strength and hardness

it can decrease tensile strength and elongation of the alloy wheel. The results show that with multi-artificial aging

the strength and hardness of the A356.2 aluminum alloy wheel are increased with the decrease of elongation and the stability of properties. However

the elongation of the alloy is deteriorated with increase in grain size in A356.2 aluminum alloy in low pressure casting.