D317 in line with GB / T 984 EDRCrMoWV-A3-15 Description: D317 is a low hydrogen sodium type coating CrWVMo die welding electrodes, DC reverse. Uses: Suitable for Die welding, cutting tools in general can also be surfacing. Deposited metal chemical composition (%) C Cr Mo WVSP other elements of total guaranteed value of 0.70 ~ 1.00 3.00 ~ 4.00 3.00 ~ 5.00 4.50 ~ 6.00 1.50 ~ 3.00 ≤0.035 ≤0.04 ≤1.50 :( surfacing layer hardness after welding, air cooling) HRC ≥50 Reference Current (DC +) Electrode Diameter (mm) f3.2 f4.0 f5.0 welding current (A) 90 ~ 120 160 ~ 190 190 ~ 230 Note: 1. Welding electrodes shall be subject to 300 ~ 350 ℃ baking 1h. 2. before welding workpieces preheated to 300 ℃, in order to avoid cracking.