Technical Specifications
Specifications & Mechanical Properties
- Copper (Cu): ≥ 79% – base matrix.
- Aluminium (Al): 8.50‑9.50% – strengthens alloy and forms protective oxide film.
- Nickel (Ni): 3.50‑4.50% – enhances toughness & corrosion resistance.
- Iron (Fe): 3.50‑4.50% – adds strength and wear resistance.
- Manganese (Mn): 0.80‑1.50% – refines structure.
- Density: ~7.64 g/cm³ – heavy and robust material.
- Tensile Strength (min): ~585 MPa (~85 ksi) – high load capability.
- Yield Strength (0.5% Ext): ~241 MPa (~35 ksi) – excellent for a copper‑based alloy.
- Brinell Hardness (3000 kg): ~159 BHN typical.
- Processing / Treatment: Supplied as‑cast or annealed/heat‑treated; machining and proper heat‑treatment recommended for best performance.
Thermal, Electrical & Miscellaneous Properties
- Melting Range: Solidus ~ 1043 °C, Liquidus ~ 1060 °C – high temperature resistance.
- Thermal Conductivity: ~36 W/m·K – decent heat transfer for bronze alloy.
- Coefficient of Linear Thermal Expansion: ~15.5 ×10⁻⁶ /K (20‑300 °C) – moderate thermal growth.
- Electrical Conductivity: ~7% IACS at 20 °C – moderate conductivity.
- Wear & Abrasion Resistance: Excellent under high load and sliding wear conditions – ideal for heavy duty service.
- Corrosion Resistance: Very good in seawater, brackish water, and industrial environments due to protective aluminium‑oxide barrier.
- Fatigue & Shock Performance: High resistance to deformation under overload and shock – suitable for heavy dynamic parts.
