Performance of Cu-based Friction Material (in oil) Friction Coefficient: μ d : 0.04 - 0.08; μ s ≥ 0.10 Wear Rate: λ ≤ 1 ? 10 -8 cm 3 /J Conditions of Application: Specific Pressure: ≤ 6 MPa Linear Velocity: ≤ 40 m/s Oil Temperature: ≤ 200 °C