PURPOSE: To produce an Al-Si aluminum alloy capable of production by the low-cost melting and casting method with superior productivity, having sufficient strength and toughness, excellent in machinability and plastic workability, and remarkably improved in wear resistance in particular as compared with the conventional one.

CONSTITUTION: This wear resistant aluminum alloy can be produced by applying hot plastic working to a cast alloy prepared by means of melting and casting. This alloy has a composition consisting of, by weight, 13.0-16.0% Si, 4.0-5.0% Cu, 0.7-1.4% Mg, ≤0.8% Fe, ≤0.1%, in total, of P or at least one element among Na, Sb and Sr, and the balance Al with inevitable impurities and also has a structure, in which coarse Si grains of 15-40μm average grain size and fine Si grains of ≤5μm average grain size or precipitates are contained and uniformly dispersed. Further, this alloy has ≤10×10-7mm2/kg specific wear loss.