By using state-of-the-art induction melting for clean efficient alloying, Hayes primarily produce an extensive range of high quality, low cost copper based alloys in ingot form. These are supplied to foundries throughout New Zealand and overseas for subsequent sand and diecasting of a wide range of components - particularly for the marine and plumbing industries.

White metal alloys for the lining of bearings and for spin casting fine jewellery and other applications are also produced.

Much of the group's output however is in alloys specially developed to meet the specific needs of its international customers.