ERNiCr-3. The nominal composition (wt.-%)of weld metal of this classification is 72 Ni, 20 Cr, 3 Mn,2.5 Nb plus Ta. Filler metal of this classification is usedfor welding nickel-chromium-iron alloy (ASTM B 163,B 166, B 167, and B1 68 having UNSn umber N06600) toitself, for the clad side of joints in steel clad with nickelchromium-iron alloy, for surfacing steel with nickelchromium-iron weld metal, for dissimilar welding ofnickel-base alloys, and for joining steel to nickel-base