The Hyundai S-8018.B2 is a premium iron powder, low-hydrogen welding electrode developed for welding 1.25% Cr-0.5% Mo heat-resistant steels. These steels are commonly used in boiler pipes, power plants, oil refining equipment, and high-temperature chemical processing.
This electrode features low hydrogen content, which minimizes the risk of hydrogen-induced cracking, ensuring weld integrity. It has high deposition efficiency due to the iron powder coating, making it ideal for thick-section welding and repair welding of cast steel components.
With stable arc performance, excellent mechanical properties, and easy slag removal, the Hyundai S-8018.B2 is a reliable choice for high-temperature applications requiring post-weld heat treatment (PWHT).
Key Features:
✔ Optimized for welding 1.25% Cr-0.5% Mo heat-resistant steels
✔ High deposition efficiency due to iron powder coating
✔ Low hydrogen content (prevents cracking and improves weld integrity)
✔ Excellent impact toughness and tensile strength
✔ Smooth arc stability and easy slag removal
✔ Recommended for use with DC(+) polarity
Typical Applications:
🔹 Boiler components in power plants
🔹 High-temperature pipelines in oil refineries
🔹 Petrochemical and chemical processing equipment
🔹 Thick-section welding and cast steel repair welding
Technical Specifications:
| Specification |
Details |
| Classification |
AWS A5.5 E8018-B2 |
| Electrode Diameter |
2.6mm |
| Pack Weight |
5kg |
| Tensile Strength |
≥ 641 MPa (93,000 psi) |
| Yield Strength |
≥ 563 MPa (82,000 psi) |
| Elongation |
≥ 30.8% |
| Impact Value at 0°C |
144 J |
| Polarity |
DC(+) |
| Post-Weld Heat Treatment (PWHT) |
690°C (1274°F) for 1 hour |
Recommended Current (DC+):
| Electrode Size |
Current Range (A) |
| 2.6mm |
55-90 A |
Chemical Composition of All-Weld Metal (%):
| Element |
Composition |
| Carbon (C) |
0.08% |
| Silicon (Si) |
0.32% |
| Manganese (Mn) |
0.75% |
| Phosphorus (P) |
≤ 0.012% |
| Sulfur (S) |
≤ 0.005% |
| Chromium (Cr) |
1.20% |
| Molybdenum (Mo) |
0.50% |
Usage Guidelines:
- Electrode Drying: Before use, dry the electrodes at 350-400°C (662-752°F) for 1 hour to remove moisture.
- Preheating: Preheat workpieces to 150-300°C (302-572°F) to prevent thermal stress.
- Post-Weld Heat Treatment (PWHT): Heat the welded component to 690°C (1274°F) for 1 hour for optimal mechanical properties.
