D317 die welding electrodes meet the GB EDRCrMoWV-A3-15 
 Description: D317 is a low hydrogen sodium type coating CrWVMo die welding electrodes, the use of DCRP. 

 Application: Die welding can also be surfacing for general cutting tools. ..... 

 Chemical Composition of Deposited Metal (%) chemical composition of CSP Mo Cr VW amount of other elements 
 To ensure that the value of 0.70 ~ 1.00 ≤ 0.035 ≤ 0.040 3.00 ~ 5.00 3.00 ~ 4.00 1.50 ~ 3.00 4.50 ~ 6.00 ≤ 1.50 

 Surfacing layer hardness: (welding followed by air cooling) HRC ≥ 50 
 Reference Current (DC +) electrode diameter (mm) φ3.2 φ4.0 φ5.0 
 Welding current (A) 90 ~ 120 160 ~ 190 190 ~ 230 

 Note: 
 1. 300-350 ℃ before welding electrodes shall be baked 1h. 
 2. Preheating before welding the workpiece to be over 300 ℃ in order to avoid cracking.