Silicon Iron Bronze

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

We are proud to say that we are the largest stocking distributor of AMS 4616 in the world.

Available shapes –  round and sleeve


Related Products



  • Roller Bearing Cages
  • Bearing Cages
  • Valve Guides
  • Rotor Bars for Engines

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Specifications of Silicon Iron Bronze

International Standard Material Designation Rod & Bar
USA C65620 AMS 4616
International ISO CuSi3Fe2Zn3  
Chemical Properties

Chemical Properties of Silicon Iron Bronze

Weight % Copper Zinc Iron Manganese Silicon Phosphorus
Min/Max 90 1.5 – 4.0 1.0 – 2.0 1.0 2.4 – 4.0 0.10
Mechanical Properties

Mechanical Properties of Silicon Iron Bronze

Product Form Condition Tensile Strength
Yield Strength
KSI 0.2%
% 4D
Rod & Bar As Manufactured 56.0 Minimum 20.0 Minimum 30% Minimum 55

While the data is believed to be accurate, Wieland Diversified makes no representation or warranty of any kind (expressed or implied) and assumes no responsibility with respect to the accuracy and values shown above; this information should only be used as a guide.

Physical Properties

Physical Properties of Silicon Iron Bronze

Suitable for welding
Suitable for hard and soft brazing
Machinability: 30% free-cutting brass

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Wieland Diversified

49 Main Street
PO Box 65
Monson, MA 01057


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