Development of Offshore Platform Steel Plate with Grade E550
ZHANG Jingwen
LIU Xiumei
Abstract：Chemical composition of E550 steel was designed with Nb、V、Ti micro alloying through theoretical analysis. Based on the E550’S thermodynamic properties, a two-stage rolling process was determined.In this process, high reduction rolling is used in high temperature and large compression ratio rolling is used in lower temperature. The quenching temperature was 920 ℃ and the tempering temperature was 630 ℃ . After tempering, the microstructure is lath Bainite and mixed with a small amount of grainy Bainite and Ferrite and M/A at 1/4 of the thickness. The structure of the plate was homogenized in the area from the place at 1/4 of the thickness to the center. The mechanical properties of the E550 steel plate (with 60 mm thickness) conform to the classification society standards and had a certain amount of surplus capacity.
Keywords：grade E550 offshore platform steelproduct trialquenching and temperingmechanical property
Publication Date：2014-11-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：3( 11-13 )