D126 GB / T 984 EDPMn4-16 D127 GB / T 984 EDPMn4-15 Description: D126 and D127 are low hydrogen type coating ordinary manganese welding consumables. DC reverse D127, D126 AC and DC (AC load voltage space greater than 70V). Uses: used for surfacing of the wear of low carbon steel, carbon steel and low alloy steel, such as axles, gears, moving wheel, blade of mixer. Deposited metal chemical composition (%) C Mn other elements of total guaranteed value ≤0.20 ≤4.50 ≤2.00 Example value 3.80 0.10 - Surfacing layer hardness: HRC≥30 reference current (D126 AC, DC +) (D127 DC +) Electrode Diameter (mm) f3.2 f4.0 f5.0 welding current (A) 90 ~ 120 140 ~ 180 180 ~ 220 Note: 1. Welding electrodes shall be subject to 300 ~ 350 ℃ baking 1h. 2. In large parts before welding should be properly preheated to about 300 ℃, rust and oil and welding parts of the surface to be cleaned.