1. chemical composition analysis: chemical analysis method, instrumental analysis method①infrared c-s instrument: analyze ferroalloys, steelmaking raw materials, c and s elements in steel.②direct reading spectrometer: c, si, mn, p, s, cr, mo, ni, cn, w, v, ti, b, nb, as, sn, sb, pb, bi in bulk sampl

medium carbon steel pipe with seamless is a carbon steel pipe with a carbon content of 0.25% to 0.60%. it includes most of the high-quality carbon structural steel and a part of ordinary carbon structural steel. most of this type of steel is used to make various mechanical parts, and some are used t

low carbon steel pipe with seamless refers to carbon steel pipe with a carbon content of less than 0.25%. because of its low strength, low hardness and softness, it is also called mild steel. it includes most ordinary carbon structural steel and some high-quality carbon structural steel, most of whi

spiral pipe (ssaw/sawh) is also called spiral steel pipe or spiral welded pipe. it is made by rolling a low-carbon structural steel or low-alloy structural steel strip into a tube blank at a certain helical angle (called a forming angle), and then welding the tube seams. it can produce large di

due to the increasing bearing pressure of the pipeline, the use conditions are becoming more and more severe, and the service life of the pipeline should be extended as much as possible. in order to improve competitiveness, carbon steel tube manufacturers should research and innovate in wh