It has been herein decided to formulate empirical formulae to correlate tribological behaviour of composite material with operating conditions. Asbestos reinforced resin bonded friction material has been chosen as an examplary composite material to be put under experimental investigation. To investigate experimentally the tribological behaviour of friction composite material we got to conduct friction and wear tests under either isothermal or transient temperature tests. A constant speed drag dynamometer (SCHENCK) has been used for conducting both the isothermal and the transient temperature tests under constant energy input conditions. The coefficient of friction has been found to decrease with applied load increase following a power function of the form f α pͣ  with an index (a) ranging from -0.27 to - 0.32.3. Arrhenius relation w α e -E/RT has been satisfactorily used to express the isothermal wear with activation energy values in the range (25-41k joule/mole), whereas, under transient temperature test conditions, the material weight loss (W) has been found to increase with both the contact pressure (p) and sliding distance (L) following a power function of the form W=KpcLd.