StarBlaze 7018
AWS A5.1: E 7018 H4 | DIN EN ISO 2560-A: E 42 B 32 H5 | IS 814: EB 5426H3JX
Superior Weldability, Crack-Resistant, Radiographic Quality Weld
A hydrogen controlled, basic heavy coated MMA electrode for crack resistant, reliable welds and excellent toughness values at low temperatures on unalloyed and low-alloyed steels.
- 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
Key Features
- Crack Superior weldability, ultra smooth finely rippled weld beads
- Excellent mechanical properties
- Self-releasing slag
- Very low spatter
- Excellent toughness values
- Good striking and re-striking
- ≤ 4.0 ml diffusible hydrogen level
- Radiographic out of position welds, including pipe welding
Industries
- Structural steel fabrication and erection
- Shipbuilding applications
- Bridges and heavy structures
- Boilers and tanks
- Pressure vessel manufacturing
- General structural engineering requiring low-temperature toughness
Processes
- Manual Metal Arc Welding (MMA / SMAW) on unalloyed and low-alloy steels
- Performs well in all positions (1G/PA, 2F/FB, 2G/PC, 3G/PF, 4G/PE, PF2)
- Low hydrogen iron powder basic coating for excellent crack resistance and toughness
- Suitable for AC and DC+ polarity
- Produces ultra-smooth, finely rippled weld beads with low spatter
- Self-releasing slag and good re-striking behavior
- Recommended for radiographic-quality out-of-position welds, including pipe welding
- Service temperature suitability down to -40 °C
Additional Details
- Base materials: S(P)235–S(P)420, GP240–GP280, L245–L360
- Weld metal hardness: ≤ 200 BHN (max)
- Re-drying conditions:
• HD5: 200–300 °C for 1–2 hrs (5 cycles)
• HD510: 250–350 °C for 1–2 hrs (5 cycles) - Welds maintain strength and ductility in high-H₂ environments
- Suitable for weld joints requiring sour gas resistance and crack avoidance
- Not recommended for short arc conditions or rapid weaving
Product Details
Typical Weld Metal Chemical Composition (%)
| C | Si | Mn | P | S |
| 0.07 | 0.40 | 1.20 | 0.020 | 0.020 |
Typical Mechanical Properties (All Weld Metal)
| Heat Treatment | Tensile Strength Rm (N/mm2) | Yield Strength Rp (N/mm2) | Elongation A5 (%) | Charpy Impact Value (ISO-V J-30°C) |
| As Welded | 550-620 | ≥ 450 | ≥ 28 | ≥ 80 |
Recommended Welding Parameters
| Diameter (mm) | Amperage Range (A) |
| 2.50 | 50-90 |
| 3.15 | 100-140 |
| 3.20 | 100-140 |
| 4.00 | 130-180 |
| 5.00 | 180-230 |
