LH J421
Equivalent to AWS E6013
Description: LH J421 is carbon steel electrodes with high titanium and potassium coating, suitable for both AC and DC, available for welding at all positions, superior in operation performance, easy for arc striking, with beautiful shaping and small splashing.
Purpose: For welding of low carbon steel structure, especially suitable for intermittent welding of small pieces made of thin sheet and short weld joint as well as cosmetic welding requiring smooth surface.
Precautions:
1. Generally, it is unnecessary to bake electrodes before welding.
2. If electrodes are damp, it shall be baked at 150-170℃ for 0.5-1 hour before application.
Chemical composition of deposite metal (%)
C | Mn | Si | S | P | |
Standard Value | ≤ 0.10 | 0.032-0.55 | ≤0.30 | ≤0.035 | ≤0.040 |
Example value | 0.08 | 0.45 | 0.2 | 0.019 | 0.020 |
Mechanical Properties of deposited metal
Tensile strength Rm (Mpa) | Yield strength Rel (Mpa) | Elongation :δ5 (%) | Akv impact Energy (J) (-20℃) |
≥420 | ≥330 | ≥22 | ≥47 |
490 | 425 | 24 | 76 |
Reference welding current (AC,DC)
Electrode diameter(mm) | Φ2.0 | Φ2.5 | Φ3.2 | Φ4.0 | Φ5.0 | Φ5.8 |
Electrode length (mm) | 300mm | 350mm | 400mm | |||
Current (A) | 40-70 | 50-90 | 80-130 | 150-200 | 180-240 | 220-280 |
