StarBlaze Prime 7018S
AWS A5.1: E7018-1 H4 | DIN EN ISO 2560-A: E 42 5 B 32 H5 | IS 814: EB 5629H3JX
Top-Class Impact Strength | Positional Precision | Buffer-Ready Reliability
A basic heavy-coated, low-hydrogen electrode designed for superior mechanical strength and crack resistance, especially on C-Mn microlow and low-alloy steels. With weld metal recovery up to 115% and consistent impact toughness down to –50 °C, it is ideal for high-strength structural joints and buffer layers. Delivers smooth arc behaviour, minimal spatter, and x-ray quality welds.
Available Packs
- Dimensions: 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, Customisable packaging available on request
Key Features
- High weld metal recovery (~115%) for efficient deposition
- Excellent impact notch toughness ≥ 80 J at –45 °C
- Produces ultra-smooth, finely rippled weld beads
- Reliable arc stability and re-strike in all positions
- Suitable for buffer layers on alloy steels
- Consistent mechanical performance in restraint-sensitive joints
Industries
- Structural Steel and Bridge Fabrication
- Pipe Spools and Cross-Country Pipeline
- Boiler and Tank Manufacturing
- Offshore Maintenance & Repairs
- Power and Energy Construction
Processes
- Manual Metal Arc Welding (MMA / SMAW)
- Works on AC and DC+ polarity
- All-position welding: 1G, 2F, 3G, 4G, 5G
- Ideal for root, fill, and cover passes
- Recommended for multipass welding with positional integrity
Additional Details
- Base materials: S(P)235–S(P)420, GP240–GP280, L245–L360
- Re-drying:
• HD5: 340–360 °C for 2 hours, up to 5 times
• HD510: 300–350 °C for 2 hours, up to 5 times - Suitable for steels with up to 0.40% carbon
- Stable in high heat-input environments without loss of toughness
- Not recommended for short arc or excessive weaving techniques
Product Details
Typical Weld Metal Chemical Composition (%)
| C | Si | Mn | P | S |
| 0.07 | 0.35 | 1.40 | 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 -45°C) |
| As Welded | 550-620 | 450 | 30 | 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 |
