Bohler FOX SKWA description: Basic electrode core wire alloyed low-hydrogen with good operating characteristics in all positions except verticaldown. Mainly used for surfacing on sealing faces of gas, water and steam valves to meet stainless and wear resistant overlays for instance. In the machined condition, at least a two layer build up should remain. Joint welding of similar, stainless and heat resistant chromium steels provides matching colour of weld metal with very good ability to polishing. Hydrogen content in weld deposit < 5 ml/100 g. Preheating and interpass temperature 200-300C, post weld heat treatment at 730-800C.