The values listed above represent reasonable approximations suitable for general engineering use. Due to commercial variations in composition and to manufacturing limitations, they should not be used for specification purposes. See applicable ASTM specification references.

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C90700 (SAE 65) Tin Bronze is primarily a gear bronze. It is strengthened by the solid solution of tin in the copper. This results in a strong, hard intercrystalline phase rich in tin. The tin atoms distort the copper matrix enough to help inhibit slip of crystal layers and the intercrystalline phase contributes to hardness. The tin bronzes do develop a low friction deposit of bronze on the mating steel parts. For this reason, tin bronze is the alloy of choice for nonferrous gears.

C90700 (SAE 65) Gear Bronze conforms to cast specifications ASTM B505,  ASTM B271 and ASTM B584.

 

C90700 (SAE 65) Gear Bronze is used for heavy duty gears, high load bearings, bushings and worm wheels.