StarBlaze Prime 8018-B8
AWS A5.5: E8018-B8 | ISO 3580-A: E CrMo9 B 42 H5
+600 °C Operation | Creep-Stable Weld Metal | Hydrogen-Resistant, Quenchable Alloy Core
A premium basic-coated MMA electrode engineered for welding high-pressure, high-temperature CrMo steels, especially 11CrMo9-1 (P9). Delivers low-hydrogen welds with excellent resistance to creep, rupture, and hydrogen attack. Optimised for petrochemical, boiler, and thermal system construction requiring stability up to +600 °C. Weld metal is fully quenchable and temperable, delivering high reliability in extreme conditions.
- 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, 30 Kg, 40 Kg, Customisable packaging available on request
Key Features
- Specially formulated for 11CrMo9-1 and equivalent P9 steels
- Withstands prolonged high-temperature service at up to +600 °C
- Excellent resistance to creep, rupture, and hydrogen embrittlement
- Weld metal properties suitable for quenching and tempering
- Delivers low-hydrogen, crack-resistant joints
- Stable arc, low spatter, smooth weld bead in all positions
Industries
- Petrochemical Processing & Thermal Cracking Units
- High-Pressure Steam Pipelines
- Hydrogenation Reactors & Hydrodesulfurisation Units
- Boiler and Heat Recovery Systems
- High-Creep, High-Pressure Alloy Fabrication
Processes
- Manual Metal Arc Welding (MMA / SMAW)
- DC+ polarity
- Weldable in all positions: PA, PB, PC, PF, PE
- Suitable for pipe joints, pressure vessel welding, and structural supports
Additional Details
- Base materials include:
• 1.7386X 11CrMo9-1, 1.7388X7CrMo9-1
• A182 Gr.F9, A213 Gr.T9, A217 Gr.C12, A234 Gr.WP9
• A335 Gr.P9, A336 Gr.F9, A369 Gr.FB9, A387 Gr.9, A426 Gr.CP9 - PWHT: 740 °C for 1 hour (air cool)
- Redry electrodes at 300–350 °C for 2 hours
- Preheat/interpass range: 200–250 °C depending on section thickness
Product Details
Typical Weld Metal Chemical Composition (%)
| C | Si | Mn | Cr | Mo | S | P |
| 0.08 | 0.30 | 0.70 | 9.00 | 1.00 | 0.010 | 0.020 |
Typical Mechanical Properties (All Weld Metal)
| Heat Treatment | Yield Strength Rp (N/mm2) | Tensile Strength Rm (N/mm2) | Elongation A5 (%) | Impact Energy ISO-V (J) +20°C |
| PWHT 740°C x 1hr | > 500 | > 600 | > 20 | > 47 |
Recommended Welding Parameters
| Diameter (mm) | Amperage Range (A) |
| 2.50 | 60-90 |
| 3.15 | 100-130 |
| 3.20 | 100-130 |
| 4.00 | 140-180 |
| 5.00 | 180-240 |
