Success took some time to come but by the early 30s, AMPCO® had achieved a recognized leadership in the production of aluminium bronze alloys as sand castings, centrifugal castings and forgings. The American Metal Products Company, renamed in 1930 AMPCO METAL. had built a reputation as a reliable producer of consistent quality.

World War II created heavy demand for the production of copper-based alloys and the value of industrial bronzes was recognized more and more, primarily in the aircraft field. By 1944, AMPCO METAL’s manufacturing had increased from 100 to 2,500 people, with every American plane carrying AMPCO METAL parts in its engines, landing gear, propellers or airframe. In the marine environment, AMPCO METAL propellers were produced for landing barges and ships, whilst overall, alloys from AMPCO METAL were used in most spheres of military operations.

The years from 1922 to the 70s saw the introduction of innovative products and technologies like non-sparking, non-magnetic Hand Tools, centrifugally cast bronzes, hard bronzes for die applications, nickel aluminium bronzes, high conductivity welding electrodes and new high strength aircraft alloys.

In the 70s the Company became the first alloy producer certified to ASME and in the 80s the first Company to use Evaporative Pattern Casting (EPC) manufacturing processes to copper-based alloys.

As early as 1957, AMPCO METAL also developped their sales network in different countries, primarily accross Europe, in order to increase market coverage.