D217A
Description:
D217A is a low hydrogen sodium type CrMnMo welding electrodes, using DC reverse.
use:
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 (%)
| C | Cr | Mo |
guarantee value | ≤0.50 | ≤2.50 | ≤2.50 |
Surfacing hardness: HRC ≥ 40
Reference current (DC + )
Electrode diameter (mm) | φ3.2 | φ4.0 | φ5.0 |
Welding current (A) | 90 ~ 110 | 140 ~ 180 | 180 ~ 220 |
Precautions:
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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