Aluminum Properties and Physical Metallurgy

Aluminum exceeding 99.99% in purity, produced by the Hoopes (Ref 1) electrolytic process, was first available early in 1920. In 1925, Edwards (Ref 2) reported some of the physical and mechanical properties of this grade of aluminum. Taylor, Willey, Smith, and Edwards (Ref 3) published a paper in 1938 that gave several properties for 99.996% aluminum that was produced in France by a modified Hoopes process. The first international meeting to discuss very pure metals was held in October 1959 in Paris (Ref 4), and a seminar on ultrahigh-purity metals was sponsored by the American Society for Metals in 1961 (Ref 5). The first edition of this monograph was published in 1967.