THJ507 (E7015)
E7015 Low-Hydrogen Carbon Steel Welding Rods | DCEP Electrodes
Certificates:
ABS
BV
CCS
DNV
KR
LR
NK
RINA
RS
Application
- Shipbuilding
- Pressure Vessel
- Energy Industry
- Heavy Machinery
DETAILS
THJ507 is basic-sodium type electrode with low hydrogen. Can be weld for all-position with DC+ only. It have excellent welding performance as good arc stiffness, little spatter, easy slag removal etc., and perfect mechanical properties of deposited metal.
Features
- Low-hydrogen sodium coating for outstanding crack and porosity resistance
- Optimized for DCEP (DC+) operation with a stable, deep-penetrating arc
- All-position welding capability with easy slag removal and clean bead appearance
- Superior mechanical properties with high low-temperature impact toughness
- Low diffusible hydrogen content for high-integrity critical welds
Typical Applications
- Important medium-carbon steel and low-alloy high-strength steel structures
- Pressure vessels, boilers, and high-pressure piping systems
- Shipbuilding, offshore oil platforms, and heavy equipment
- Bridge construction and heavy structural steel frameworks
- High-restraint joints requiring high crack resistance and safety margins
Welding Positions
- PA / PB / PC / PD / PE / PF
WARNING
- The electrodes must be re-dried at 350-380°C for 1 hour before welding.
- Rust, oil, moisture, and other contaminants must be removed from the weld area before welding.
| Test Item | Rm (MPa) | Rel / RP₀.₂ (MPa) | A （%） | KV₂ （J） -30℃ |
|---|---|---|---|---|
| Requirement | 500-640 | ≥420 | ≥22 | ≥80 |
| Typical Result | 580 | 490 | 30 | 180 |
| Element | C | Mn | Si | S | P | Ni | Cr | Mo | V |
|---|---|---|---|---|---|---|---|---|---|
| Requirement (%) | ≤0.10 | ≤1.25 | ≤0.65 | ≤0.030 | ≤0.035 | ≤0.30 | ≤0.20 | ≤0.30 | ≤0.08 |
| Typical Result (%) | 0.07 | 1.00 | 0.32 | 0.012 | 0.017 | 0.030 | 0.035 | 0.005 | 0.004 |
| Diameter (mm) | 2.0 | 2.5 | 3.2 | 4.0 | 5.0 |
|---|---|---|---|---|---|
| Current (A) | 40-70 | 60-90 | 90-130 | 140-180 | 180-230 |