CuSn7ZnPb (ASTM B505 C93200 & RG7 Bronze Bearing) 铜合金

CuSn7ZnPb (ASTM B505 C93200 & RG7 Bronze Bearing) 铜合金

and Applications

Bronze bushings, particularly those made from CuSn7ZnPb alloy, play a crucial role in a multitude of mechanical systems, offering durability, reliability, and efficiency. Known under different designations such as 2.1090, Rg 7, GC-Rg 7, and GZ-Rg 7, this specific bronze alloy is highly sought after for its impressive properties and wide-ranging applications. This article delves into the composition, characteristics, and uses of CuSn7ZnPb bronze bushings.

Composition and Designations

CuSn7ZnPb, designated as 2.1090, Rg 7, GC-Rg 7, or GZ-Rg 7, is a type of tin bronze alloy. As the name suggests, the primary constituents are copper (Cu), tin (Sn), zinc (Zn), and lead (Pb). The alloy typically contains approximately 7% tin, which enhances its strength and wear resistance. Zinc and lead are added in smaller proportions to improve machinability and embeddability, which are crucial for the bushing’s performance in various applications.

Properties and Characteristics

The CuSn7ZnPb alloy is renowned for its exceptional mechanical properties. Its composition grants it excellent wear resistance, making it suitable for applications where durability and longevity are paramount. The presence of lead in the alloy provides superior embeddability, allowing the bushing to capture and hold small particles, which helps in avoiding abrasive wear. Moreover, this bronze alloy exhibits good fatigue resistance, essential for components subjected to cyclic loads.

Thermal conductivity is another key feature of the CuSn7ZnPb bronze bushing. The alloy efficiently dissipates heat, preventing overheating and potential damage in high-speed or high-load applications. This characteristic, combined with its natural resistance to corrosion, makes the bushing ideal for use in harsh environments.