D337
Description:
D337 is a low hydrogen sodium type crust CrW hot forging welding electrodes, using DC reverse.
use:
For cast steel or forging steel surfacing die, die forging repair can also be used.
Deposited metal chemical composition (%)
| C | Cr | W | S | P | Other elements of the total |
guarantee value | 0.25 ~ 0.55 | 2.00 ~ 3.50 | 7.00 ~ 10.00 | ≤0.035 | ≤0.040 | ≤1.00 |
Example value | 0.35 | 2.65 | 8.50 | 0.010 | 0.015 | - |
Surfacing layer hardness:
(Air-cooled after welding) HRC ≥ 48
Reference current (DC + )
Electrode diameter (mm) | φ3.2 | φ4.0 | φ5.0 |
Welding current (A) | 90 ~ 110 | 150 ~ 180 | 180 ~ 210 |
Precautions:
1. Before welding electrodes to be 300 ~ 350 ℃ baking 1h.
2. Before welding the workpiece should be preheated to 300 ~ 400 ℃ above, slow cooling after welding.
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