ASTM A36 is a standard specification for carbon structural steel used in construction and manufacturing. It outlines the requirements for steel plates, shapes, and bars that are commonly used in building structures, bridges, and other applications. The material is known for its good weldability and machinability, making it a popular choice in various industries. The specification defines the chemical composition, mechanical properties, and testing methods for A36 steel. Typically, it has a yield strength of 36,000 psi and is available in various thicknesses. This versatility and strength make ASTM A36 a fundamental material in engineering and construction projects.