Patent ID: 6290905
Filing Date: 2001-09-18
Classification: B23K,C21D

Abstract:
A welding material for structural welding purposes, comprising a ferrous alloy containing C, Cr, Ni, Si, Mn, Mo and Nb, all of which have percentages by weight which comply substantially with the following equation (1):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),said ferrous alloy after welding having capacity to initiate martensite transformation during cooling after said welding, whereby said weld metal undergoes expansion to a greater degree at room temperature than at said temperature of initiation of said martensite transformation.