StarBlaze Prime 7018S (SP) NACE
AWS A5.1: E7018-1 | DIN EN ISO 2560-A: E 42 5 B 32 H5 | EN 499: E 42 5 B 32 H5 | IS 814: EB 5629H3JX
NACE Conformant | -50 °C Impact Rated | Radiographic, Dynamic Load Ready
A low hydrogen, iron powder type electrode developed for critical service welding in sour gas environments. Provides superior crack resistance, low moisture absorption, and weld metal impact strength ≥ 85 J at –50 °C. Conforms to NACE TM-0284 (HIC) and TM-0177 (SSCC), making it ideal for equipment exposed to hydrogen, impact, and pressure cycling. Suitable for offshore, nuclear, and structural welds subject to dynamic loading.
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
- NACE TM-0284 & TM-0177 compliant for sour service
- Excellent impact strength (≥ 85 J @ –50 °C)
- Low hydrogen (H4) weld metal: < 4 ml / 100g
- Conforms to Mn+Cr+Ni+Mo+V < 1.75 requirement
- Stable arc, low spatter, and clean slag detachment
- Reliable performance in dynamic load and pipe stress conditions
- Sour Gas & Petrochemical Facilities
- Offshore Rigs and Subsea Piping
- Pressure Vessels & Nuclear Components
- Energy Transmission Infrastructure
- Structural Steel under Pressure Cycling or Impact Loading
- Manual Metal Arc Welding (MMA / SMAW)
- Operates on both AC and DC+ polarity
- All-position welding including overhead and vertical-up
- Suitable for pipe spools, pressure seams, structural tie-ins
- Delivers radiographic-quality multipass welds
- 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 | Mn | Si | P | S | Ni | Mo |
| 0.06 | 1.40 | 0.30 | 0.015 | 0.010 | 0.10 | 0.10 |
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) |
Hardness |
| As Welded | 450 | 510-610 | 30 | 85 J | 200 BHN Max. |
Recommended Welding Parameters
| Diameter (mm) | Amperage Range (A) |
| 2.50 | 60-80 |
| 3.15 | 110-135 |
| 4.00 | 140-180 |
| 5.00 | 180-230 |
