D217A is a low hydrogen sodium type CrMnMo welding electrodes, using DC reverse.
Mainly used for surfacing high-strength wear-resistant parts. The welding and repair, and mineral breaker member 30CrMnSi 35CrMnSi roll metallurgical, mining 4M . 3 bucket tooth and other welding excavator teeth and the like.
Deposited metal chemical composition (%)
Surfacing hardness: HRC ≥ 40
Reference current (DC + )
Electrode diameter (mm)
Welding current (A)
90 ~ 110
140 ~ 180
180 ~ 220
1. Before welding electrode to be about 350 ~ 400 ℃ baking 1h.
2. Large pre-heated before welding to 200 ~ 300 ℃ or so, and the surfacing part of the surface rust and oil clean.
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