Microstructure and Mechanical Properties of Quenched and Tempered 300M Steel

摘要

Type 300M steel, which is being used for the landing gear on the Space Shuttle Orbiter, was subjected to a variety of strength and toughness tests. Mechanical tests and microstructural studies were performed in parallel. The recommended austenitizing temperatures are given for both maximum plane-strain fracture toughness and maximum tensile ultimate and yield strengths.