Abstract: The experiment research deals with the usage performance of a kind of aluminum alloy during nature aging.The alloy comprises 7% of stannum and appropriate cuprum, nickel, titanium, boron etc.The test results show that the alloy's tensile strength ranges from 195MPa to 207.5MPa, breaking elongation percentage (δ₅) ranges from 5.4% to 6.3%, hardness ranges from HBS72 to HBS76, its strength and plasticity is not lower than that of ZQSn6-6-3 tin bronze alloys, its hardness is little better than that of ZQSn6-6-3 tin bronze alloys; further more?, it has excellent wear resistance, friction-reduce ability and anti-seizure property.It is suitable for making mechanical components such as unitary-material bearing shells.