Abstract: An aluminium alloy in extruded form, consisting of in weight %:______________________________________ Si 11.0-13.5 Mg 0.5-2.0 Fe not more than 1.0 Cu not more than 0.35 Zr not more than 0.1 Ni not more than 0.1 Cr not more than 0.1 Zn ot more thane 0.1 Sr 0.02-0.1 Mn not more than 1.2 Bi not more than 1.0 Pb not more than 1.0 Sn not more than 1.0 ______________________________________balance Al and unavoidable impurities. This alloy has high wear resistance, good corrosion resistance and good machinability. It is particularly suitable for shaped articles used at below 150.degree. C.