astm a53 carbon steel pipe

Yield point of seamless steel pipe (σs) For metal materials with yield phenomenon, the stress at which the sample can continue to elongate without increasing (remaining constant) force during the stretching process is called the yield point. If the force decreases, the upper and lower yield points should be distinguished. The unit of yield point is N/mm2 (MPa). Upper yield point (σsu): the maximum stress before the specimen yields and the force decreases for the first time; Lower yield point (σsl): the minimum stress in the yield stage when the initial instantaneous effect is not considered. The formula for calculating the yield point is: In the formula: Fs--yield force (constant) during the tensile process of the sample, N (Newton) So--original cross-sectional area of the sample, mm2. Seamless steel pipe material: 20Mn Q345 Q345B Q345D Q345E Q235 20G, Carbon steel pipe material: 20g 16Mn 15CrMoG 15CrMo 8163 API5L pipeline steel pipe pipe material X42, X46, X52, X56,…