C86300

C86300, also known as manganese bronze or SAE 430B, is a high-strength copper alloy known for its excellent mechanical properties, corrosion resistance, and wear characteristics. It is widely used in demanding applications such as heavy-load bearings, large valve stems, hydraulic cylinder parts, marine hardware, gears, and industrial components needing high strength and durability.

Chemical Composition of C86300

• Copper (Cu): 60.0 - 66.0%

• Zinc (Zn): 22.0 - 28.0%

• Aluminium (Al): 5.0 - 7.5%

• Manganese (Mn): 2.5 - 5.0%

• Iron (Fe): 2.0 - 4.0%

• Nickel (Ni): Up to 1.0%

• Lead (Pb): Max 0.2%

• Tin (Sn): Max 0.2%

Properties

• Tensile Strength: Approximately 110 ksi (758 MPa)

• Yield Strength (0.5% offset): About 62 ksi (427 MPa)

• Elongation: Around 14%

• Brinell Hardness: Approx. 223

• Density: 7.83 g/cm³

• Melting Point: Solidus 1625°F (885°C), Liquidus 1693°F (923°C)

• Electrical Conductivity: 8% IACS

• Machinability Rating: 8 out of 100

• Corrosion resistant with good wear resistance

• Not heat treatable, requires reliable lubrication in use