... alloy-steel pipe for high-temperature service. The pipe shall be suitable for bending, flanging, and similar forming operations, and for fusion welding. The steel material shall ... maxMechanical Properties Grade P11, P22, P5, P9Grade P91Grade P92Tensile strength, min, (MPa)415585620Yield strength, min, (MPa)205415440Elongation, min, (%), L/T30/2020/…20 ...