公开(公告)号：US3925067A

公开(公告)日：1975-12-09

申请号：US52041274

申请日：1974-11-04

Applicant: ALUSUISSE

Inventor： SPERRY PHILIP R ,  TYLER DEREK E ,  BUTZKY LEON

IPC: C22C21/16

CPC classification number: C22C21/16

Abstract: An aluminum base casting alloy possessing improved machinability comprising from about 3.5 to about 6.0% copper, from about 0.5 to 3.0% silver, up to about 1% manganese, from about 0.15 to about 0.90% magnesium, up to about 0.20% silicon, up to about 0.20% iron, from about 0.4 to about 0.7% bismuth, from about 0.4 to about 0.7% lead and the remainder aluminum.