The Hyundai S-7018.1H is a premium iron powder, low-hydrogen welding electrode engineered for high-quality welding of low-temperature strength steels, heavy steel structures, and offshore applications. It provides excellent impact toughness at temperatures as low as -45°C, making it ideal for demanding environments.
This electrode contains a high percentage of iron powder in its coating, which enhances deposition efficiency, ensuring high productivity. It offers stable arc performance, minimal spatter, and easy slag removal, resulting in high-quality welds with low hydrogen content.
Available Variants:
- 3.2mm – Standard welding electrode for structural steel and general applications.
- 3.2mm LT – Designed for low-temperature environments, offering enhanced impact toughness in cold conditions.
- 4.0mm – Higher deposition rate for thick sections and heavy-duty applications.
Key Features:
✔ Extra low hydrogen content (H4R classification)
✔ Excellent impact toughness at -45°C
✔ High deposition efficiency due to iron powder coating
✔ Stable arc with minimal spatter
✔ Easy slag removal for smooth welds
✔ Suitable for AC or DC+ polarity
Typical Applications:
🔹 Heavy steel fabrication
🔹 Low-temperature strength steel structures
🔹 Offshore structures and shipbuilding
🔹 Cryogenic and low-temperature storage tanks
🔹 Pressure vessels and high-strength steel welding
Technical Specifications:
| Specification |
Details |
| Classification |
AWS A5.1/ASME SFA5.1 E7018-1 H4R |
| Electrode Diameter |
3.2mm, 3.2mm LT, 4.0mm |
| Pack Weight |
5kg |
| Tensile Strength |
≥ 566 MPa |
| Yield Strength |
≥ 493 MPa |
| Elongation |
≥ 30.8% |
| Impact Value at -45°C |
152 J |
| Polarity |
AC or DC(+) |
Recommended Current (AC or DC+):
| Electrode Size |
Current Range (A) |
| 3.2mm |
90-140 A |
| 3.2mm LT |
90-140 A |
| 4.0mm |
130-190 A |
Chemical Composition of All-Weld Metal (%):
| Element |
Composition |
| Carbon (C) |
0.06% |
| Silicon (Si) |
0.25% |
| Manganese (Mn) |
1.35% |
| Phosphorus (P) |
≤ 0.014% |
| Sulfur (S) |
≤ 0.005% |
