Techalloy 4130 description: Techalloy 4130 is a high strength, low alloy welding wire for joining steels of similar chemical composition, as well as for overlays where moderate hardness is required. This wire can be used for TIG, MIG, and submerged arc welding applications. A preheat and inter-pass temperature of not less than 400F required during welding. Note; Mechanical properties of welds listed below are governed by the heat treatment undergone by the weld metal. Mechanical properties are for weld meal oil quenched from 1550F and tempered at 1050F.