Manganese Bronze alloys can operate under very high loads and speeds. However, bearing applications require reliable lubrication. Besides excellent mechanical qualities, these alloys have good corrosion resistance.
Manganese is added to the bronze alloy for several reasons. Manganese is stronger than other bronzes, which makes it a tough metal that is great for industrial uses.
Manganese bronzes contains small additions of manganese, iron, and aluminum, plus lead for lubricity, anti-seizing, and bonding. Like the aluminum bronzes, they combine high strength with excellent corrosion resistance. Manganese bronze bearings can operate at high speeds under heavy loads, but require high shaft hardness and nonabrasive operating conditions.
The various types of manganese bronzes are a popular choice for the aerospace, fastener, marine, and oil and gas Industries. Typical applications in these industries include landing gear parts, strut bushings, screw machine parts, bearings, bushings, gears, and lead screw nuts.
There are many grades in this, some of them are C66800, C67300, C67310, C67400, C67410, C67420, C67500, C67600, C86200, C86300 etc.