hollow steel sections with hot finish high strength low carbon for improved welding

摘要

Hollow Section of hot finished steel with high strength under CEV CEV where = C + (mN / 6) + ((CR + Mo + V) / 5) + ((Cu + ni) / 15) and where (in wt%).* C: 0.12 to 0.18; * if: 0.60; * mn *: 1.2 - 1.6; P: 0.015 0.035; * s; V: 0.13 - 0.20; * *: 0.04; * - N: 0.008 0.025; * you *: 0.01; CR: 0.15; * or *:: 0.20; mo cu: 0.04 0.20; * * NB: 0,;05% * optionally, CA 0.015%, more preferably below to 0.005.In an amount consistent with calcium treatment for the control of Inclusions; * the remaining Iron and unavoidable impurities; where CEV = 0,45%; and where the mechanical properties meet the industry standards and s420nh s420nlh according to en10210 - 1: 2006.