Description:
J426 is a low hydrogen potassium type of carbon steel electrode. AC and DC dual-use, can be all-position welding. The deposited metal has excellent mechanical properties and crack resistance, good impact toughness at low temperature.
use:
For the welding of low carbon steel and low alloy steel structure, such as shipbuilding, bridges, pressure vessels.
Deposited metal chemical composition (%)
C | Mn | Si | S | P | Ni | Cr | Mo | V | |
guarantee value | ≤0.20 | ≤1.20 | ≤1.00 | ≤0.035 | ≤0.040 | ≤0.30 | ≤0.20 | ≤0.30 | ≤0.08 |
Example value | 0.062 | 0.83 | 0.30 | 0.010 | 0.019 | 0.031 | 0.030 | 0.007 | 0.018 |
Deposited metal mechanical properties
Pilot projects | Rm (N / mm 2 ) | ReL (N / mm 2 ) | A (%) | KV 2 (J) |
-30 ° C | ||||
guarantee value | ≥430 | ≥330 | ≥20 | ≥27 |
Example value | 495 | 395 | 33 | 172 |
X-ray inspection:
Ⅰ level
Reference current (AC, DC + )
Electrode diameter (mm) | φ2.5 | φ3.2 | φ4.0 | φ5.0 |
Welding current (A) | 60 ~ 100 | 80 ~ 140 | 110 ~ 210 | 160 ~ 230 |
Precautions:
⒈ welding electrode to be baked by 350 ℃ 1h, with baking with the use.
⒉ weld before welding must be removed rust, oil, water and other impurities.
⒊ welding operation required to use a short arc to narrow the welding is appropriate
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