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Copper-tin alloys containing a specific amount of tin are among the most important industrial bronzes. As with brass, the addition of tin to copper involves a series of solution treatments.
5% tin, 95% copper tin bronze
10% tin, 90% copper tin bronze
15% tin, 85% copper tin bronze
Bronzes containing 10-12% tin are the most ideal materials in terms of mechanical properties. This type of bronze is preferred in casting parts. Casting bronze contains tin, lead, phosphorus and nickel. Tin bronzes such as our Cuptin 2, Cuptin 3 and Cuptin 4 can be preferred for shafts with a hardness of 300 HB and less.
Leaded tin bronze is tin bronze containing up to 20% lead. It is the preferred material in bushings as its hardness is very low and so it is well suited for use in . Because of its, this property, it does not damage the shaft. An other property of them is that the lead lubricant feature is activated when there is little or no lubrication.
There are also zinc-containing varieties of leaded tin bronze. Both alloys are preferred for low and high speed shafts.