抄録
ABSTRACT It is well known that the strength of the weld metal depends on cooling time and chemical composition of weld metal. In this paper, empirical formulae estimating the tensile strength and the yield strength of the weld metal considered with cooling time and chemical composition are proposed. The tensile strength of weld metal in beam to column connection is higher than that of butt joint by 3%. For steel with the grade 400NImm2, thestrength of the weld metal is higher than that of the steel, even if heat input (HI) and interpass temperature (IT) arelarge. While, for steel with the grade 490N/mm2, the tensile strength of the weld metal is less than that of the steel, even if HI and IT are small, when chemical composition Ceq≤0.250.
