Welding method and welding material
 A welding method for two members adapted to be welded and formed of a low-alloy steel for structural purposes causing the weld metal to develop martensite transformation during cooling after welding, so that the weld metal becomes expanded to a greater degree at room temperature than at a temperature at which the martensite transformation initiates. The welding material comprises a ferrous alloy containing C, Cr, Ni, Si, Mn, Mo and Nb, all of which meet substantially with the contents of the following equation (1): ##EQU1## 
Kawasaki Steel Corporation
B C C
B23K C21D C21D
inventional inventional additional
Osamu Satoshi Chiaki Akihiko
Watanabe Nishijima Shiga Ohta