ROYAL PRIME 81B2 is a low alloy flux-cored wire developed for welding 2.25% Cr – 1% Mo creep-resistant steels. These steels are widely used in boilers, pressure vessels, power plants, oil refineries, and petrochemical industries where elevated temperature strength and creep resistance are essential.
| C | Mn | Si | Ni | Cu | Cr | P | S |
| 0.05 – 0.12 | 0.50 – 1.25 | 0.35 – 0.80 | – | – | 1.00 – 1.50 | ≤0.03 | ≤0.03 |
| Property | UTS (MPa) | Yield Strength (MPa) | Elongation (%) | Impact Toughness |
| Typical Values | 570 – 690 | 480 – 520 | 18 – 24 | 45 – 60 J @ –29°C |
| Welding Position | Current (A) | Voltage (V) | Shielding Gas | Gas Flow (L/min) |
| Flat / Horizontal | 200 – 400 | 26 – 36 | CO₂ / Mix Gas (Ar+CO₂) | 15 – 25 |
| Vertical / Overhead | 160 – 300 | 24 – 33 | CO₂ / Mix Gas (Ar+CO₂) | 15 – 25 |
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