JACKSUN ULTRA CR9 SPL is a specialized low-hydrogen electrode for welding creep-resistant steels in high-temperature, high-stress applications. Designed for boilers, heat exchangers, and superheater tubing, it ensures excellent weld integrity, crack resistance, and long-term performance under thermal and mechanical stress.
| C | Mn | Si | Ni | Mo | Cr | S | P |
| 0.08-0.13 | ≤ 1.20 | ≤ 0.30 | ≤ 0.80 | 0.85-1.20 | 8.0-10.5 | ≤ 0.01 | ≤ 0.01 |
| Property | UTS (MPa) | Yield Strength (MPa) | Elongation (%) | Impact Toughness (J @ 0 °C) |
| Requirement | ≥ 620 | ≥ 550 | ≥ 17 | ≥ 47 |
| Typical Values | 640 – 1000 | 570 – 850 | 17 – 28 | 55 – 75 |
| Size (mm) | Size (inch) | Current Range (A) | Polarity | Voltage (V) | Packing (5 kg) | Packing (20 kg) |
| 2.5 | 3/32 | 50 – 90 | AC / DC+ | 20 – 22 | ✔ | ✔ |
| 3.2 | 1/8 | 90 – 130 | AC / DC+ | 22 – 24 | ✔ | ✔ |
| 4.0 | 5/32 | 120 – 180 | AC / DC+ | 24 – 26 | ✔ | ✔ |
| 5.0 | 3/16 | 160 – 240 | AC / DC+ | 26 – 28 | ✔ | ✔ |
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