THERMO-MECHANICAL CONTROL PROCESS TYPE 590 MPa-CLASS H-SHAPE STEEL, AND ITS MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a TMCP (thermo-mechanical control process) type 590 MPa-class H-shape steel requiring no particular special-purpose wire for welding.;SOLUTION: The TMCP type 590 MPa-class H-shape steel has a chemical composition consisting of, by mass, ≤0.041 to 0.06% C, 0.03 to 0.6% Si, 0.3 to 1.6% Mn, ≤0.03% P, ≤0.015% S, 0.1 to 0.5% Cu, 0.1 to 1.5% Ni, 0.11 to 1.0% Cr, 0 to 0.29% Mo, 0.005 to 0.10% V, 0.005 to 0.07% Nb, 0.005 to 0.03% Ti, 0 to 0.0005% B, 0.003 to 0.049% Al, ≤0.008% N, ≤0.004% O, ≤0.0001% H and the balance Fe with impurities.;COPYRIGHT: (C)2007,JPO&INPIT