Schnader Harrison Segal & Lewis LLP
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): EQU 170.ltoreq.719-(795.times.C wt %)-(23.7.times.Cr wt %)-(26.5.times.Ni wt %)-(35.55.times.Si wt %)-(13.25.times.Mn wt %)-(23.7.times.Mo wt %)-(11.85.times.Nb wt %)<250 (1). 
Kawasaki Steel Corporation
B C C
B23K C21D C21D
inventional additional inventional
Chiaki Akihiko Osamu Satoshi
Shiga Ohta Watanabe Nishijima