Patent ID: 8258432

Claim:
A non-autogenous arc welding process for forming a weld in a workpiece made from a TRIP steel in which an iron-based filler material is melted by an electric arc in the presence of a flux and the molten material formed thereby solidified to form a weld, the weld exhibiting an ultimate tensile strength of at least about 100 ksi and a % elongation of at least about 15%, wherein the filler material and flux are selected so that the weld obtained contains (a) about 0.02 to 0.20 wt. % C, (b) at least about 0.7 wt. % Al, (c) Si in an amount such that the combined amounts of Si and Al in the weld is about 1.7-3.0 wt. %, (d) Mn and Ni in amounts such that the combined amounts of Ni and Mn in the weld is about 1.7-3.0 wt. %, wherein the amount of Ni in the weld is 55-80% of the combined amounts of Ni and Mn in the weld, and further wherein the weight ratio of Ni and Mn to Al and Si in the weld is about 1.2:1-1:1.15.