ASTM Standard A572

A572 steel is available in five different grades: 42, 50, 55, 60, and 65. Each grade number indicates the yield strength of this high strength, low alloy steel. Its multiple favorable properties make it a staple for construction applications. One of the most commonly used A572 grades is A572-50. This grade has an ultimate tensile strength of 65,300 psi and a high tensile yield strength of 50,000 psi. It is used for structural applications, some of which include buildings, bridges, construction equipment, tanks and truck frames.