ISO 428 was an International Organization for Standardization (ISO) standard fully entitled “Wrought Copper-Aluminium Alloys — Chemical Composition And Forms of Wrought Products”, specifying the allowable compositions of various copper–aluminum alloy specifications (see aluminium bronze). The standard, promulgated in 1983, was withdrawn in March 2000.

Following is a list of aluminium bronze wrought alloy compositions, by ISO 428 designations (proportional composition by weight; copper is the remainder by weight and is not listed):

Alloy Aluminium Iron Nickel Manganese Zinc Arsenic
CuAl5 4.0% – 6.5% 0.5% max 0.8% max 0.5% max 0.5% max 0.4% max
CuAl8 7.0% – 9.0% 0.5% max 0.8% max 0.5% max 0.5% max
CuAl8Fe3 6.5% – 8.5% 1.5% – 3.5% 1.0% max 0.8% max 0.5% max
CuAl9Mn2 8.0% – 10.0% 1.5% max 0.8% max 1.5% – 3.0% 0.5% max
CuAl10Fe3 8.5% – 11.0% 2.0% – 4.0% 1.0% max 2.0% max 0.5% max
CuAl10Fe5Ni5 8.5% – 11.5% 2.0% – 6.0% 4.0% – 6.0% 2.0% max 0.5% max