Characteristics of tin bronze

Characteristics of tin bronze
Bronze containing 3% to 14% tin, in addition to phosphorus, zinc, lead and other elements are often added. It is the earliest alloy used by mankind, and it has been used for about 4,000 years. It is corrosion-resistant, wear-resistant, has good mechanical properties and process performance, and can be welded and brazed well without sparks during impact. Divided into processed tin bronze and cast tin bronze. The tin content of tin bronze used for pressure processing is less than 6% to 7%, and the tin content of cast tin bronze is 10% to 14%. Commonly used grades are QSn4-3, QSn4-4-4, QSn7-O.2, ZQSn10-1, ZQSn5-5-5, ZQSn6-6-3, etc. Tin bronze is a non-ferrous metal alloy with the smallest casting shrinkage. It can be used to produce castings with complex shapes, clear contours and low air tightness requirements. Tin bronze is very resistant to corrosion in the atmosphere, sea water, fresh water and steam, and is widely used in steam boilers and marine ship parts. Phosphorus-containing tin bronze has good mechanical properties and can be used as wear-resistant parts and elastic parts of high-precision machine tools. Leaded tin bronze is often used as wear-resistant parts and sliding bearings. Zinc-tin bronze can be used as high-airtight castings.
The solidification range of tin bronze is large, and dendrite segregation is serious; concentrated shrinkage cavities are not easily formed during solidification, and the volume shrinkage is small; reverse segregation of tin is easy to appear in the ingot, and white spots (8-phase precipitation) can be seen on the surface of the ingot in severe cases. There are even tin-rich particles, generally called tinsweat. Improving the casting method and process conditions can reduce the degree of reverse segregation; in liquid alloys, tin is prone to form hard and brittle inclusions SnO2, and smelting must be fully deoxidized to prevent inclusions. The resulting decrease in the mechanical properties of the alloy; low sensitivity to overheating and gas, good welding and brazing; no sparks during impact, non-magnetic, cold resistance, and extremely high wear resistance.
Tin bronze is a non-ferrous metal alloy with the smallest casting shrinkage rate. It is used to produce castings with complex shapes, clear contours and low air tightness requirements. Tin bronze is very resistant to corrosion in the atmosphere, sea water, fresh water and steam, and is widely used in steam boilers and marine ship parts. Phosphorus-containing tin bronze has good mechanical properties and can be used as wear-resistant parts and elastic parts of high-precision machine tools. Leaded tin bronze is often used as wear-resistant parts and sliding bearings. Zinc-tin bronze can be used as high-airtight castings.
Recommended grades of commonly used American copper alloys (tin bronze):
　C54400 C52100 C83600 C84400 C93200 C93700 C93800