Relationship Between Impact Strength and Stress Intensity Factor K 1 c for Steels Used in Manufacturing Petrochemical Equipment

The dependence of fracture toughness (stress intensity factor K1c) for steels on their mechanical properties (yield strength and impact energy) taking account of the effect of temperature is considered. The nature of change in K1c in the temperature range +20 to –40°C is demonstrated on the example of three steels.