C51900/CuSn6 phosphor bronze has high strength, elasticity, wear resistance and diamagnetism. It has good press workability in hot and cold conditions,

 and has high flame resistance to electric sparks. It can be welded and fiber welded, and it can be machined. Good, corrosion resistant in the atmosphere and fresh water.

C51900/CuSn6 is used to make springs and spring contact pieces with good conductivity, wear-resistant parts and diamagnetic parts in precision instruments, such as gears, brush boxes, vibrating plates, contactors, etc.

Chemical composition 

Mechanical properties

C5191   HV       Tensile strength  Elongation

 M       90-110      310-395             >40 
 H/4    110-150    395-490            >35 
 H/2    150-180    490-600            >20 
 H       180-210    590-680            >10 
 EH     210-230    >635                >5