“…About mechanical characteristics of CoCr alloys, necessary for ultrasonic material removal modelling, modulus of elasticity varies between 200 -220 GPa, much higher than other alloys used in medical applications, based on Ti and Au, and ultimate tensile strength is 1300 MPa [1,2,9]. Stellite alloys have higher elasticity modulus at 230 GPa, and ultimate tensile strength at 1195 MPa [3,4], in comparison with CoCr Arcam alloys with 960 MPa [2].…”