Patent ID: 6042782
Filing Date: 2000-03-28
Classification: B23K,Y10T

Abstract:
A composite wire welding material for use in welding stainless steels, composed of a steel shell and a filler material enveloped by the said steel shell and not containing slag forming agent, characterized in that:said welding material, as a whole of the steel shell and filler material enveloped therein, consists of not more than 0.03% C, not more than 1.0% Si, not more than 1.5% Mn, not more than 0.04% P, not more than 0.01% S, not more than 0.5% Al, 8.0 to 10.0% Ni, 22.0 to 26.0% Cr, 2.0 to 5.0% Mo, 0.12 to 0.24% N, not more than 3.0% Co, not more than 5.0% W, not more than 2.0% Cu, not more than 1.50% V and the balance being Fe and incidental impurities;pitting resistance equivalent PREW of the said welding material is not smaller than 42.0 and ferrite volume index Ph of said welding material is 0.12 to 0.25, in which PREW and Ph are defined by the following formula 1 and formula 2 respectively: ##EQU3## wherein each symbol of an element indicates the content (weight %) of the element.