| 摘要 |
PURPOSE:To provide a titled wire which is suited for welding high tension steels by contg. C, Si, Mn, Ni, Cr, Mo, P, S, Cu, Ti, etc. respectively in prescribed ratios and consisting of the balance Fe and a prescribed ratio or below of Nb. CONSTITUTION:A wire for inert gas shielded arc welding contg., by weight %, <=0.15% C, 0.25-0.70% Si, 1.1-2.0% Mn, 2.0-4.0% Ni, 0.41-1.50% Cr, 0.65- 1.80% Mo, <=0.30% P, <=0.030% S, <=0.30% Cu, <=0.15% Ti, <=0.001% B, <=0.010% Al, <=0.010% O, <=0.007% N and consisting of the balance Fe and <=0.03% Nb. This wire improves the tensile strength and toughness of weld metal to an extremely high level. The wire is thus extremely advantageous is welding ultra-high tension steels of 100kg/cm<2> class. |
