Specifies requirements for formable and structural grades of hot-dipped zinc-coated and aluminium/zinc-coated sheet and strip, up to and including 5.0 mm thick. Gives information on coating thickness determination, fabricating characteristics and guidelines on the selection of specific grades.

First published as part of AS A20-1934. Second edition 1947. Revised and redesignated in part as AS G24-1967. Revised and redesignated AS 1397-1973. Second edition 1977. Third edition 1984. Fourth edition 1993.