With the aid of tensile and bending tests, the fracture toughness values (KIC) are determined. The maximum nominal load is 400 kN at a minimum test speed of 10 µm/min. Here, the testing machine is driven via horizontal threaded spindles. Moreover, the nitrogen refrigerated chamber enables tests in the temperature range between -150 °C and +250 °C. The software LabMaster is featured with a convenient module: KIC tensile testing and bending test in accordance with ASTM E 399.