WEARcore 742 N-S is a submerged arc cored wire that deposits a ferritic martensitic steel with nitrogen added, which improves the resistance to thermal fatigue and intragranular corrosion by reducing carbide formation at the grain boundaries.
Submerged arc welding gives a very high deposition rate on long, repeatable welds, and the wire works as a set with a matched flux that decides the mechanical properties of the weld. Previously sold as SK 742 N-SK.
- Classification EN ISO: 14700 T Fe7
- AWS classification: 8555 UP 5-GF-45-C
- Shielding: flux matched to the wire, no shielding gas
- Hardness of deposit: 44 HRC
Remove the fatigued and hardened surface layer before you build up, a deposit laid on worn material will flake off. Match the flux to this wire and check how dry it is, drying the flux decides the hydrogen level in the weld. Keep an even flux layer over the arc, too thin a layer exposes the arc and too thick a one spoils the bead shape. Lay the overlay in overlapping beads and watch the part temperature, an overheated component will distort.
