ROYAL PRIME 71 is a flux-cored arc welding (FCAW) wire designed for carbon steel welding. It provides excellent arc stability, easy slag removal, and smooth bead appearance. Suitable for structural fabrication, shipbuilding, heavy machinery, and general engineering applications. Optimized for both 100% CO₂ and Ar + 20–25% CO₂ shielding gases.
| C | Mn | Si | S | P | Cr | Ni | Mo | Cu |
| 0.06 – 0.12 | 1.20 – 1.75 | 0.30 – 0.90 | ≤ 0.030 | ≤ 0.030 | ≤0.20 | ≤0.50 | ≤0.30 | ≤0.35 |
| Property | UTS (MPa) | Yield Strength (MPa) | Elongation (%) | Impact Toughness |
| Typical Values | 530 – 580 | 440 – 500 | 26 – 30 | 60 – 80 J @ –29°C |
| Welding Position | Current (A) | Voltage (V) | Shielding Gas | Gas Flow (L/min) |
| Flat / Horizontal | 180 – 350 | 24 – 34 | 100% CO₂ or Ar + 20–25% CO₂ | 15 – 25 |
| Vertical / Overhead | 120 – 280 | 22 – 30 | 100% CO₂ or Ar + 20–25% CO₂ | 15 – 25 |
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