Patent ID: 6277217
Filing Date: 2001-08-21
Classification: C22C

Abstract:
A die-cast product having a high toughness and comprising a matrix of .alpha.-aluminum crystals, wherein said matrix comprises magnesium and eutectic crystals of Al.sub.6 Mn and A.sub.3 Ni, wherein said die-cast product is produced using an aluminum alloy which has a composition consisting essentially of, by weight,magnesium in a range of 3.0%.ltoreq.Mg.ltoreq.5.5%,manganese in a range of 1.5%<Mn.ltoreq.2.0%,nickel in a range of 0.5%.ltoreq.Ni.ltoreq.0.82%, andthe balance of aluminum, including inevitable impurities,wherein the die-cast product has a tensile strength of about 284.4 Mpa to about 319.5 Mpa, a 0.2% proof strength of about 151.3 Mpa to about 164.5 Mpa, and an elongation of about 11.8% to about 12.9% in a tension test and a Charpy impact value of about 48.8 J/cm.sup.2 to about 50.4 J/cm.sup.2 in a Charpy impact test.