Patent ID: 9279173
Filing Date: 2016-03-08
CPC Classification: C22C,C22F

Claim Text:
1. An aluminum alloy forged material, comprising aluminum, and by mass percent: from 0.6˜1.2% of Mg; from 0.7˜1.5% of Si; from 0.1˜0.5% of Fe; from 0.01˜0.1% of Ti; from 0.3˜1.0% of Mn; at least one of 0.1˜0.4% of Cr and 0.05˜0.2% of Zr; a restricted amount of Cu that is less than or equal to 0.1%; a restricted amount of Zn that is less than or equal to 0.05%; and a restricted amount of H that is less than or equal to 0.25 ml in 100 g Al, wherein the aluminum alloy forged material includes precipitated crystalline particles among which a largest precipitated crystalline particle has a maximum equivalent circle diameter of less than or equal to 8 μm and has a tensile strength larger than or equal to 420 MPa, and an area ratio of the precipitated crystalline particles is equal to or less than 3.6%.