C90500

C90500 is a high-tin bronze casting alloy, also known as "G Bronze" or "SAE 62," commonly used for its strength, wear resistance, and corrosion resistance, particularly in marine and industrial applications.

Chemical Composition (ASTM B505/B271)

• Copper (Cu): 86.0 – 89.0%

• Tin (Sn): 9.0 – 11.0%

• Zinc (Zn): 1.0 – 3.0%

• Lead (Pb), Iron (Fe), Antimony (Sb): Max 0.2% each

• Nickel + Cobalt (Ni + Co): Max 1.0%

• Phosphorus (P): Max 1.5%

• Sulphur (S): Max 0.05%

• Aluminium (Al), Silicon (Si): Max 0.005% each

Mechanical Properties

• Tensile Strength: Min 303 MPa

• Yield Strength: Min 172 MPa

• Elongation: Min 10%

• Brinell Hardness: Medium (typically ~70–90)

• Machinability Rating: 50 (on free-cutting brass scale)

Physical Properties

• Density: 8.72 g/cm³

• Melting Point: Solidus ~854°C, Liquidus ~999°C

• Thermal Conductivity: ~75 W/m·K

• Electrical Conductivity: ~11% IACS

• Modulus of Elasticity: ~103 GPa

Applications

• Bearings and bushings

• Pump bodies and impellers, gears, valve bodies, seal rings, piston rings

• Marine parts, water pumps and fittings

• Heavy construction, connectors, clamps, fasteners

Fabrication and Joining

• Soldering: Excellent

• Brazing: Good

• Weldability (Arc): Fair