In addition to containing 3% to 14% tin, tin bronze often also adds elements such as phosphorus, zinc, and lead. It is the earliest alloy used by humans and has a history of use of about 4,000 years. It is corrosion-resistant and wear-resistant, has good mechanical and process properties, can be welded and brazed well, and does not produce sparks during impact. It is 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 include QSn4-3, QSn4.4-2.5, QSn7-O.2, ZQSn10, ZQSn5-2-5, ZQSN6-6-3, etc. Tin bronze is a non-ferrous metal alloy with the smallest casting shrinkage and can be used to produce castings with complex shapes, clear outlines and low air tightness requirements. Tin bronze is very corrosion-resistant in the atmosphere, seawater, 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. Lead-tin bronze is often used as wear-resistant parts and sliding bearings, while zinc-tin bronze can be used as high airtight castings.

Tin bronze has a large solidification range and serious dendrite segregation; it is difficult to form concentrated shrinkage cavities during solidification, and the volume shrinkage is very small; reverse segregation of tin is prone to occur in the ingot, and in severe cases, white color can be seen on the surface of the ingot Spots (8-phase precipitation), and even tin-rich particles appear, generally called tinsweat. Improving casting methods and process conditions can reduce the degree of reverse segregation; in liquid alloys, tin easily generates hard and brittle inclusions SnO2, and smelting requires Fully deoxidized to prevent the reduction of alloy mechanical properties caused by inclusions; very little sensitivity to overheating and gases, can be welded and brazed well; no sparks occur during impact, non-magnetic, cold-resistant, and have extremely high Wear resistance.