AWS A5.5: E8018-D3 | EN ISO 18275-A: E 46 4 2 B 32 H5
-50 °C Cold Toughness | Low-Hydrogen Mn-Mo Alloy | Critical Security Joint Reliability
A basic-coated iron powder electrode designed for low-hydrogen welding of Mn-Mo type high-strength steels. Suitable for pressure vessels, restrained joints, and cold climate infrastructure. Delivers superior notch toughness (60 J @ –50 °C), smooth bead appearance, and less than 4.0 ml diffusible hydrogen. Recommended for critical restraint welding and post-weld heat-treated joints. Welds are radiographic quality with excellent resistance to cracking.
Available Packs
Typical Weld Metal Chemical Composition (%)
| C | Si | Mn | Mo | Ni | P | S |
| 0.08 | 0.40 | 1.30 | 0.50 | 0.50 | 0.020 | 0.020 |
Typical Mechanical Properties (All Weld Metal)
| Heat Treatment | Yield Strength
Rp (N/mm2) |
Tensile Strength
Rm (N/mm2) |
Elongation
A5 (%) |
Charpy Impact Value
ISO-V (J) -50°C |
| PWHT 620°C/1hr | 520 | 600 – 650 | 26 | 60 J |
Recommended Welding Parameters
| Diameter (mm) | Amperage Range (A) |
| 2.40 | 50-80 |
| 2.50 | 60-90 |
| 3.15 | 90-130 |
| 3.20 | 90-130 |
| 4.00 | 130-180 |
| 5.00 | 180-240 |
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