D507MoNb
Description:
D507MoNb is a low hydrogen sodium type 1Cr13 valve welding electrodes, using DC reverse, due to the coating added by the amount of Mo, Nb and other strengthening and stable elements, so surfacing metal has good oxidation resistance and resistance Crack performance.
use:
For working temperature below 450 ℃, medium and low pressure valve sealing surface surfacing.
Deposited metal chemical composition (%)
| C | Cr | Mo | Nb | S | P | Other elements of the total |
guarantee value | ≤0.15 | 10.00 ~ 16.00 | ≤2.50 | ≤0.50 | ≤0.030 | ≤0.040 | ≤2.50 |
Example value | 0.14 | 11.80 | 0.40 | 0.35 | 0.009 | 0.021 | - |
Surfacing layer hardness:
(Air-cooled after welding) HRC ≥ 37
Reference current (DC + )
Electrode diameter (mm) | φ3.2 | φ4.0 | φ5.0 |
Welding current (A) | 80 ~ 120 | 120 ~ 160 | 160 ~ 190 |
Precautions:
⒈ welding electrode to be 300 ~ 350 ℃ baking 1h.
⒉ weldment before welding is not preheated, welded without heat treatment.
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