Technical Specifications
Specifications & Mechanical Properties
- Copper (Cu): 81.0‑85.0% – base matrix element.
- Tin (Sn): ~6.0‑8.0% – reinforces strength and wear resistance.
- Lead (Pb): ~6.0‑8.0% – enhances machinability and lubrication.
- Zinc (Zn): Up to ~4.0% – contributes to alloy structure.
- Density: ~8.9 g/cm³ – heavy and robust material.
- Tensile Strength (min): ~205‑240 MPa (depending on casting method)
- Proof Strength (0.2%): ~100‑140 MPa
- Elongation: ~10‑15% (continuous cast)
- Hardness: ~65‑70 HB (typical)
- Processing / Treatment: Supplied continuously cast; best performance achieved with proper machining and lubrication.
Thermal, Electrical & Miscellaneous Properties
- Melting Point (approx.): ~977 °C liquidus/solidus for this alloy family.
- Thermal Conductivity: ~58 W/m·K (approx at room temperature)
- Coefficient of Linear Thermal Expansion: ~18 ×10⁻⁶ /K (20‑200°C)
- Electrical Conductivity: ~12% IACS @20 °C – moderate.
- Wear & Abrasion Resistance: Good under sliding contact and moderate load when adequately lubricated.
- Corrosion Resistance: Resistant to brine and seawater; not prone to dezincification.
- Machinability: Excellent – lead content gives very good free‑machining performance compared to similar bronzes.
