The alloys which are described as tin bronzes have long been recognized for their low lead content (less than .25% lead) and high strength characteristics. These alloys from C90200 through C91700 are not materially different than those produced more than 3,500 years ago in Europe and China. These alloys are strong and have high wear resistance and low friction resistance, which make them ideal in bearing, as well as in valves and fittings where pressure tightness is necessary. In today’s world, these proven alloys are all green with their low-lead content.
Chemical Compositions, Mechanical and Machinability Properties.