D502 in line with GB EDCr-A1-03 


 Description: D502 is titanium calcium type coating of 1Cr13 valve surfacing electrode can be both AC and DC welding process is good. Weld metal is high 1Cr13 semi-ferritic chromium steel. Cladding layer with air quenching characteristics, generally do not need to heat treatment, hardness uniformity, can be annealed at 750-800 ℃ soften when heated to 900-1000 ℃ air-cooled or oil quenched, can be re-hardened. 


 Uses: This is a versatile surfacing welding rod for welding temperature carbon steel at 450 ℃ or below the shaft and alloy steel valves. 


 Chemical Composition of Deposited Metal (%) Chemical composition of other elements of the total CSP Cr 
 Ensure value ≤ 0.15 ≤ 0.030 ≤ 0.040 10.0 ~ 16.0 ≤ 2.50 


 Cladding layer hardness: (welding followed by air cooling) HRC ≥ 40 

 Reference current (AC, DC) electrode diameter (mm) φ2.5 φ3.2 φ4.0 φ5.0 
 Welding current (A) 50 ~ 80 80 ~ 120 120 ~ 160 160 ~ 200 


 Note: 
 1 Welding electrodes shall be subject to about 150 ℃ baking 1h. 
 (2) will be required before welding the workpiece preheated to above 300 ℃, heat treatment after welding to obtain the corresponding different hardness.