StarBlaze 7018–A1
AWS A5.5: E7018–A1 | ISO 3580-A: EMoB 42 H5 | DIN EN 1599: EMoB42 | DIN 8575: EMo B10+
Creep-Resistant | 115% Recovery | Mo Steel Qualified
A moisture-resistant, low hydrogen electrode developed for boiler, pipe, and pressure vessel welding of creep-resistant steels containing 0.5% Mo and 0.5–1.0% Cr. Delivers reliable all-position welds with high arc stability, smooth bead profile, and strong performance both as-welded and after stress relieving. Suitable for high-temperature applications up to 525 °C. Trusted in fabricating cement kilns, chemical vessels, cast steel machinery, and other high-stress structures.
Available Packs:
Dimensions:2.50 mm x 350 mm, 3.15 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, Customisable packaging available on request
- Developed for creep-resistant 0.5% Mo and Cr-Mo steels
- High recovery (approx. 115%) – ideal for heavy-wall joints
- Stable arc, good slag release, and X-ray quality welds
- Performs reliably as-welded or after PWHT
- Conforms to EN, DIN, and ISO classifications for Mo-bearing electrodes
- Excellent mechanical performance at elevated temperatures (up to 525 °C)
- Boiler & Heat Recovery Steam Generators
- Cement Kiln & Furnace Fabrication
- Pressure Pipe Welding & Cast Steel Frames
- Oil Refineries and Thermal Plants
- Heavy Industrial Machinery & Chassis Construction
- Manual Metal Arc Welding (MMA / SMAW)
- Operates on AC and DC+ polarity
- Suitable for all-position welding (PA, PB, PC, PF, PE)
- Designed for Mo-steel and cast steel component joining
- Excellent for thick wall sections and high-recovery applications
- Base materials include:
• EN 10028-2: P235, P265, P295, P355, 16Mo3
• EN 10213-2: GP240 R, G20Mo5
• EN 10216-1: P235, P275 | EN 10025: S235–S355
• EN 10113: S275–S460 | Ship grades A–E - PWHT compatible – typical cycle: 620 °C for 2 hrs
- Re-drying recommended: 300–350 °C for 2 hrs
- Charpy impact energy > 40 J at –30 °C (as-welded & stress-relieved)
- Diffusible hydrogen content ≤ 4 ml/100g weld metal
Product Details
Typical Weld Metal Chemical Composition (%)
| C | Si | Mn | Mo | P | S |
| 0.06 | 0.40 | 0.80 | 0.50 | 0.020 | 0.016 |
Typical Mechanical Properties (All Weld Metal)
| Yield Strength Rp (N/mm2) | Tensile Strength Rm (N/mm2) | Elongation A5 (%) | Charpy Impact Value ISO-V J -30°C | |
| As Welded | > 470 | 550-650 | 24 | ≥ 40 J |
| Stress Relieved | > 450 | 520-620 | 26 | ≥ 40 J |
Recommended Welding Parameters
| Diameter (mm) | Amperage Range (A) |
| 2.50 | 60-90 |
| 3.15 | 100-140 |
| 4.00 | 140-180 |
| 5.00 | 180-230 |
