Development of 26.4 mm Thick Specification X80HD2 Pipeline Steel
LIU Zhigang
Abstract：Based on low C and high manganese content, Nb, Cr, Cu, Ni, Ti and other Alloying elements were added for design the alloy system. Using clean steel metallurgy technology alloy system, strengthening and combining with the two stage rolling and ACC multi path laminar cooling process to ensure the strength and toughness, the X80HD2 steel plate with the large strain was developed. The transverse yield strength of the steel plate with ferrite+bainite dual phase structure is 470-568 MPa, the transverse tensile strength is 660-760 MPa and the Rt0.5/Rm is 0.65-0.79. The longitudinal yield strength of the plate is 455-540 MPa, the longitudinal tensile strength is 660-727 MPa and the Rt0.5/Rm is 0.64-0.77, the Rt1.5/Rt0.5 is more than 1.13 and the Rt2.0/Rt1.0 is more than 1.06. All the intensity indexes meet the requirements of the Standard and the performance indexes show a normal distribution. Combing with the newly developed pipe manufacture process, the X80HD2 welding pipe with anti deformation property put into mass production have good strength and large uniform elongation and stress ratio.
Keywords：pipeline steelX80HD2thick specificationlarge straindouble phase structuretoughness
Publication Date：2015-11-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：5( 9-13 )