Historical
BS 2870:1980
Specification for rolled copper and copper alloys: sheet, strip and foil (British Standard)
Thicknesses up to 10.0 mm in 5 grades of copper and 30 copper alloys. Dimensions and tolerances; composition, condition and mechanical properties for general applications. Further requirements or particular applications for specific materials for clocks, watches, instruments, telecommunications, roofing, building, decorative and other purposes.
British Standards Institution [bsi]