WEARcore 420-S is a submerged arc cored wire that deposits a martensitic steel containing 13 percent chromium, with good resistance to metal to metal wear and corrosion, used on dredging pump casings and continuous casting rollers.
The wire works as a set with a matched flux, which decides the mechanical properties of the weld. It is used on mechanised stations, on butt welds in plate and circumferential welds on tanks. Previously sold as SK 420-SA.
- Classification EN ISO: 14700 T Fe8
- AWS classification: 8555 UP 6-GF-55-C
- Shielding: flux matched to the wire, no shielding gas
- Hardness of deposit: 53 HRC
Lay the overlay in overlapping beads and watch the part temperature, an overheated component will distort and crack where the layers meet. Keep an even flux layer over the arc, too thin a layer exposes the arc and too thick a one spoils the bead shape. Watch the wire stick-out and the position of the head against the weld centre line, under a flux you cannot see the pool and a mistake shows only after the slag is chipped off.