The invention relates to a process for producing a pipe fitting (10), for example a reduction piece, a pipe elbow or a branch, wherein a metallic material (11) is melted by heating, and wherein a plurality of material layers (12) is produced in a successive manner from the melted material (11), wherein the in each case produced material layer (12) is materially bonded to the in each case previous material layer (12), and wherein the pipe fitting (10) is formed from the material layers (12) bonded to one another. The pipe fitting (10) is produced by buildup welding, for example arc welding or beam welding.

A hardfacing metal composition and method of restoring worn work string tubing by application of a hardfacing metal to the worn regions of the work string tubing.