StarBlaze Prime 9018-B3
AWS A5.5: E 9018-B3 | EN ISO 3580-A: ECrMo2B4 2 H5
For 2.25Cr–1Mo Steels | High-Temp Stability | PWHT-Compatible Alloy Welds
A basic coated, low hydrogen Cr-Mo alloyed electrode engineered for welding creep-resistant and high-pressure hydrogen service steels—especially those used in boilers, pressure vessels, and heat exchangers. Delivers stable arc control and low spatter, producing clean, high-strength welds with excellent mechanical reliability up to 600°C in service. Ideal for 10CrMo9-10/11CrMo9-10 joints and overlay surfacing.
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
- Designed for 2.25Cr–1Mo alloy steel joints and overlays
- Excellent creep rupture resistance under high thermal load
- Smooth arc performance and easy slag detachment
- X-ray quality welds in demanding code-critical service
- Compatible with both annealing and tempering PWHT cycles
Industries
- Pressure Vessel Manufacturing
- Oil & Gas Processing Units
- Boiler & Heat Recovery Systems
- Power Plant Pipe Fabrication
- High-Pressure Steam Infrastructure
Processes
- Manual Metal Arc Welding (MMA / SMAW)
- DC+ polarity only
- Welding positions: PA, PB, PC, PF, PE
- For optimal performance, preheat and interpass control is essential
Additional Details
- Base materials include:
• ASTM A335 Gr. P22
• ASTM 387 Gr. 22
• EN 10028-2: 10CrMo9-10, 11CrMo9-10
• EN 10213-2: G 17 CrMo 9-10 - PWHT: 690°C / 1 hour typical
- Tempering: Minimum 0.5 hr at 700°C, air cooled
- Annealing: 0.5 hr at 930–950°C, then cooled in air and tempered at 700°C
- Recommended for creep resistance in long-cycle high-temp environments
Product Details
Typical Weld Metal Chemical Composition (%)
| C | Si | Mo | Mn | Cr | P | S |
| 0.07 | 0.35 | 1.00 | 0.80 | 2.20 | 0.020 | 0.018 |
Typical Mechanical Properties (All Weld Metal)
| Yield Strength Rp (N/mm2) | Tensile Strength Rm (N/mm2) | Elongation A5 (%) | Charpy Impact Value (ISO-V J +20°C) | Stress Relieved (PWHT) |
| ≥ 550 | 620-750 | ≥ 20 | ≥ 47 | (690°C/1hr.) |
Recommended Welding Parameters
| Diameter (mm) | Amperage Range (A) |
| 2.50 | 60-90 |
| 3.15 | 100-140 |
| 3.20 | 100-140 |
| 4.00 | 140-180 |
| 5.00 | 180-230 |
