The document reports on an impact test to determine the ductile to brittle transition temperature of steel samples. It describes using Charpy impact testing machines to test samples at different temperatures achieved with boiling water, ice, and room temperature. The results show absorbed energy decreases with lower temperatures, indicating more brittle behavior. The document provides background on fracture types and theories, details the Charpy V-notch impact test procedure and calculations, and lists factors that affect transition temperature.