Submerged Arc Hardfacing Flux Cored Wire LM551Characteristics: 1.Submerged arc hardfacing flux cored wire, electrode positive.2.Flux :HJ1073.Excellent welding performance, good welding appearance and easy slag removal.4.With the precipitation strengthening effect of Cr W and low carbon, the deposited metal shows excellent tempering and wear resistance, and maintain strength and hardness at high temperature because of dispersed carbides.Application:Suitable for hardfacing hot rolling cogging roll, intermediate roll, pinch roll etc.Chemical Composition (%) and HardnessC W SiCrOthers Hardness0.25 ~ 0.76.0 ~ 10.0≤2.04.0~8.0≤2.0≥55 HRCHardness is measured on 4 layers of deposited metal, thickness≥ 8mm.Welding Procedure Parameters and PackingDiameter(mm) Amperage(A) Voltage(V) Packing3.2 300~450 28-34 50kg/ coil or 250kg/ drumNotes:1. Remove fatigue layer, oil and rust.2. Remove the slag in case of slag inclusion.3. Preheating temperature ≥350℃(6 hours), interpass temperature ≥300℃.4. Stored in cool and dry place, use up within three days once opened.
