D172 in line with GB / T 984 EDPCrMo-A3-03 Description: D172 titanium calcium type coating of CrMo-type welding electrodes can be AC ??and DC. When welding arc stability, easy slag removal, process performance is better. Use: welding gear, dredging bucket, tractor scraper, deep plowing plow, mining machinery and other wear parts. Deposited metal chemical composition (%) C Cr Mo guaranteed ≤0.50 ≤2.50 ≤2.50 cases 0.30 2.15 1.50 Surfacing layer hardness: HRC≥40 Reference current (AC, DC) electrode diameter (mm) f3.2 f4.0 f5.0 welding current (A) 90 ~ 120 150 ~ 180 190 ~ 230 Note: 1. Welding electrodes shall be subject to about 150 ℃ baking 1h. 2. Before welding large parts should be properly preheated to about 300 ℃, and the welding surface rust and oil cleaned.