Available Shapes

Silicon Iron Bronze

Specs: AMS 4616

UNS#: C65620

Silicon Iron Bronze, AMS 4616 / UNS C65620, is primarily for anti-friction bearing cages. Our Silicon Iron Bronze is controlled and tested for both grain size and hardness. It is 100% UT tested, and from a D.F.A.R.S. qualified mill.


Silicon Iron Bronze, commonly known as AMS 4616, is an excellent source for anti-friction bearing cages, races, and spacers. It’s a special high strength silicon bronze with additional iron content that provides added strength in conjunction with the self lubricant of the silicon for excellent bearing and load properties.

We stock solid bar from 5/8″ to 4 1/2″ and machine blanks from 4 1/2″ to 18″.

We also produce finished machined retainers:

  • Ball Bearing – Completed Cages
  • Roller Bearing – Completed Cages
  • Split Retainers – Completed Cages
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