公开(公告)号：US20190316230A1

公开(公告)日：2019-10-17

申请号：US15999785

申请日：2017-02-16

Applicant: NHK SPRING CO., LTD. ,  TOPURA CO., LTD.

Inventor： Noriyoshi KANEDA ,  Takeshi SUZUKI ,  Kouhei MIYAMOTO ,  Naoki HORIUCHI

IPC: C22C21/02 ,  C22F1/043 ,  C22C21/14 ,  C22C21/16 ,  C22C21/18 ,  C22C21/00 ,  C22F1/057

Abstract: An aluminum alloy contains 0.7% to 1.8% of silicon, 0.5% to 2.1% of copper, 0.4% to 1.8% of manganese, 0.6% to 1.6% of magnesium, and 0.1% to 0.7% of zinc in terms of mass ratio and the balance aluminum with inevitable impurities.