ROYAL PRIME 91B3 is a low alloy flux-cored wire specially designed for welding 2.25% Cr – 1% Mo creep-resistant steels. It provides weld metal with excellent creep strength, oxidation resistance, and toughness for high-temperature service. Applications include boilers, power plants, petrochemical refineries, heat exchangers, and pressure vessels.
| C | Mn | Si | Ni | Mo | Cu | Cr | P | S |
| 0.05 – 0.12 | 0.50 – 1.25 | 0.35 – 0.80 | – | 0.90-1.20 | – | 2.00 – 2.50 | ≤0.03 | ≤0.03 |
| Property | UTS (MPa) | Yield Strength (MPa) | Elongation (%) | Impact Toughness |
| Typical Values | 640 – 760 | 540 – 580 | 17 – 24 | 40 – 55 J @ –29°C |
| Welding Position | Current (A) | Voltage (V) | Shielding Gas | Gas Flow (L/min) |
| Flat / Horizontal | 200 – 400 | 26 – 36 | CO₂ or Ar + 20–25% CO₂ (mix) | 15 – 25 |
| Vertical / Overhead | 160 – 300 | 24 – 33 | CO₂ or Ar + 20–25% CO₂ (mix) | 15 – 25 |
Share your welding process, base material and application requirements. Our team will help you select the suitable product.
Tested for consistent performance.
Reliable distribution and timely supply.
Manufacturing capacity you can depend on.
Technical guidance for product selection.
