... welding. The steel material shall conform to chemical composition, tensile property, and hardness requirements. Each length of pipe shall ... maxMechanical Properties Grade P11, P22, P5, P9Grade P91Grade P92Tensile strength, min, (MPa)415585620Yield strength, min, (MPa)205415440Elongation, min, (%), L/T30/2020 ... / N+TN+T / Q+TN+T ASTM A572 High Strength Low Alloy Columbium and Vanadium Structure Pipe