Based on published patented manufactured technologies for high strength pipeline steel including heavy plate

hot rolled coil and seamless tube at home and abroad in 2011. the key manufacturing technologies

structure and properties of pipeline steel with excellent anti-large-strain-deformation

low temperature toughness and corrosion resistance are summarized. The main R&D characteristics and trend on high strength pipeline steel are excellent anti-large-strain-deformation steel- through dispersed M/A to increase strength of steel: low temperature toughness steel- using Mn-Nb-Mo alloying and control rolling to get main ferrite and/or bainite structure ； and anti-HIC ( hydrogen-induced cracking) pipeline steel- with prerequisite to control C

P

Mn segregation induced HIC

lowing Nb and Ti content in steel to prevent Nb

Ti carbo-nitride inducing hydrogen-induced cracking.