StarBlaze Prime 8018-D3
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
- Dimensions: 2.40 mm x 350 mm, 2.50 mm x 350 mm, 3.15 mm x 450 mm, 3.20 mm x 450 mm, 4.00 mm x 450 mm, 5.00 mm x 450 mm
- Pack Sizes: 2.5 Kg Pouch, 5 Kg Box
- Master Box: 20 Kg, 30 Kg, 40 Kg, Customisable packaging available on request
- Excellent toughness at sub-zero service temperatures (–50 °C)
- Designed for low alloy, high-strength Mn-Mo steels
- Produces crack-free welds under restraint
- Smooth arc and finely rippled bead appearance
- Low hydrogen <4 ml/100 g, reducing hydrogen-induced cracking
- Radiographic quality welds with high strength consistency
- Penstocks & High-Pressure Conduits
- Power Generation & Thermal Plants
- Earthmoving & Heavy Structural Equipment
- Cold Climate Infrastructure
- High Strength Steel Fabrication under PWHT
- Manual Metal Arc Welding (MMA / SMAW)
- Compatible with AC and DC+ polarity
- Weldable in all positions: PA, PB, PC, PF, PE, PF2
- Ideal for components requiring PWHT and high joint integrity
- Base materials: ASTM A302 Gr. B and similar Mn-Mo alloyed steels
- PWHT recommended at 620 °C / 1 hr
- Re-drying: 350 °C for 1–2 hours, max 3 cycles
- Maintain dry storage to preserve hydrogen control properties
Product Details
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 |
