SSAW Pipe

　　Straight joint steel tube structural design features 　　1. Tensile strength (σb): The maximum force (Fb) received by the sample during the stretching process, divided by the original cross-sectional area (So) of the sample (σ), is called Tensile strength (σb) in N/mm2 (MPa). It shows the maximum ability of metal data to resist damage under tensile effects. Where: Fb - the maximum force accepted when the sample is broken, N (Newton); So - the original cross-sectional area of the sample, mm2. 　　2. The yield point (σs): metal data with the phenomenon of yielding, the force of the sample during the stretching process is not added (maintained stable), the stress can continue to stretch, called the yield point. If the force attack declines, the upper and lower yield points should be distinguished. The unit of the yield point is N/mm2 (MPa). Upper yield point (σsu): the maximum stress before the sample is bent and the force is first lowered; the lower yield point (σsl): the minimum stres...