| J807 | According with GB E8015-G |
| Introduction: J807 is a kind of low-alloy high strength steel electrode with low-hydrogen natrium type coating. DCRP (Direct Current Reversed Polarity). All-position welding. It has excellent welding performance and crack-resistance. |
| Uses: Mainly used for welding 14MnMoNbB steel and low-alloy high strength steel structures at corresponding strength grade. |
Chemical Composition of Deposited Metal (%)
| Chemical Composition | C | Mn | Si | S | P | Mo | | Guarantee Value | ≤0.09 | ≤2.00 | ≤0.40 | ≤0.030 | ≤0.030 | 0.80~1.00 | | General Result | ≤0.08 | ~1.40 | ≤0.40 | ≤0.020 | ≤0.020 | ~0.90 | |
Mechanical Properties of Deposited Metal
| Test Item | Rm(MPa) | ReL or Rp0.2(Mpa) | A(%) | KV2(J) | | Guarantee Value | ≥780 | ≥690 | ≥13 | ≥27(normal temperature) | | General Result | 800~850 | ≥720 | 14~18 | 40~80 | |
| Diffusible Hydrogen Content in Deposited Metal:≤4.0ml/100g(Glycerine Hydrogen Test) |
| X-ray Radiographic Inspection:ⅠDegree |
Reference Current(DC+)
| Electrode Diameter(mm) | φ3.2 | φ4.0 | φ5.0 | | Welding Current (A) | 90~120 | 140~180 | 170~220 | |
Instructions:
1.The electrodes must be baked under about 400℃ for an hour before welding, and used as soon as baking is completed.
2.The stains on the weldments, such as rust, oil stains, moisture, etc., must be cleared away before welding.
3.When welding, short arc must be used and the weld should not be too wide. It is suitable if the weld is two or three times the diameter of an electrode |
