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Silicon bronze is a low-lead brass alloy that is generally composed of 96 percent copper. The remainder can be made from silicon and a variety of other alloys such as manganese, tin, iron, or zinc. Silicon Bronze was originally developed for the chemical industry but later expanded due to its good casting characteristics. Silicon Bronze is known for its easy pouring ability, appealing surface finish and superior corrosion resistant properties, even when submerged in liquids and chemicals.


Silicon bronze offers added strength in conjunction with the self-lubricity of silicon for excellent bearing and load properties. This is especially useful when Bagues en bronze is used for bearing cages, raceways and spacers specifically for the aerospace industry.

 bronze bush manufacture

AMS 4616 Silicon Bronze

AMS 4616 is a special high strength silicon bronze; the additional iron content provides added strength in conjunction with the self-lubricity of the silicon for excellent bearing and load properties. AMS 4616 / C65620 is easily machined into ball bearing cage assemblies.

C65100 Low Silicon Bronze “B”


C65100 is an engineering alloy at least as resistant to corrosion as copper itself, but much stronger, and with good fatigue endurance. 651 Bronze is an alloy noted for itsbraze ability, strength, corrosion resistance, and electrical properties. C65100 is one of the most wieldable copper alloys. It is readily joined by all types of resistance welding. Joining by soldering or brazing is excellent. Joining by gas shielded arc welding and spot welding is also excellent, and by oxyacetylene welding, good.

C65100 nails are also widely used in boat construction and for nailing slate, heavy tile, and other materials where strength and corrosion resistance are essential.

C65100 Bronze hull and deck fastenings are the standard materials with yacht designers and the majority of builders of stock power boats. The alloy is also used for cable connectors, mast tangs, deck and pilot house hardware and equipment, welded fuel and water tanks for pleasure and commercial crafts. It is also one of the best copper alloys for pole line hardware.

Typical Uses for C65100 Low Silicon Bronze “B”:

  • ELECTRICAL : Conduit, Pole Line Hardware, Motor, Rotor Bars
  • FASTENERS : Bolts, Cable Clamps, Cap Screws, Machine Screws, Nuts, Rivets, U Bolts, Fasteners, Screws
  • INDUSTRIAL : Oil Refinery Plumbing Tube, Heat Exchanger Tube, Welding Rod, Hydraulic Pressure Lines
  • MARINE : Hardware

Chemical Properties :

Min/MaxRem0. – 2.01.5

C65500 High Silicon Bronze “A”

ASTM B96, ASTM B248, ASTM B98, SAE J461, SAE J463

C65500 is a high strength, engineering alloy that has excellent resistance to a wide range of corrosives, including fresh and salt water, most acids, alkalies, salts, and organic chemicals. However, it is not suitable for use with sulfides, nitric acid, acid chromates, or oxidizing salts such as ferric chloride. 655 Bronze has a combination of corrosion resistance, strength, resilience, and formability that makes them among the most widely used copper alloys. Noted to be non-sparking, galling resistant, and fatigue resistant. Typical applications of C65500 include electrical conduit, pump shafts, valve stems, tie rods, fasteners, marine and pole-line hardware, nuts, bolts, screws, rivets, nails, bushings, screen cloth and wire.

Chemical Properties :

Min/MaxRem0.80.050.50- – 3.81.5