747 Ultra Electrodes, 1/8"

747 Ultra Electrodes, 1/8"

The 747Ultra18 747 Ultra Electrodes (1/8") are high-performance welding electrodes designed to handle nearly any steel welding challenge, especially when working with unknown steels or dissimilar metal combinations. Reformulated for **excellent arc stability—even on older or low-voltage welders such as AC buzz boxes—**these electrodes produce smooth metal transfer with minimal spatter and instant arc restarts. The unique “Insta Peel™” slag system allows the slag to lift off easily after welding, saving time and frustration. With exceptional strength, crack resistance, and toughness, these electrodes are ideal for repair work, maintenance welding, and rebuilding worn parts—basically the kind of rod you keep close when the metal in front of you is a mystery but the repair still needs to hold.

Country of Origin
Varies by production batch

Key Features / Specifications

• Model / Part Number: 747Ultra18
• Product Type: General-purpose steel welding electrodes
• Diameter: 1/8 in. (3.25 mm)
• Compatibility: Designed for AC or DC reverse polarity (electrode positive) — especially effective on AC welders
• Arc Performance: Exceptional arc stability, even on low open circuit voltage welders
• Metal Transfer: Smooth weld metal transfer with very low spatter
• Restart Performance: Instant arc restarts for efficient welding
• Slag System: “Insta Peel™” slag designed for easy, self-releasing removal
• Tensile Strength (As Welded): Up to 127,000 psi (882 N/mm²)
• Yield Strength: Up to 90,000 psi (620 N/mm²)
• Elongation: Approx. 37%
• Hardness: Approx. 320 HB
• Recommended Amperage (1/8 in.): 70–120 amps
• Joint Preparation: Clean surfaces free of rust, grease, paint, or contaminants
• Preheat (High Carbon Steel): Approx. 350°F (176°C) recommended
• Interpass Temperature: Below 500°F (260°C)
• Welding Technique: Short arc length with stringer beads recommended

Ideal For

• Maintenance and repair welding on a wide range of steels
• Unknown or mixed steel types where weld compatibility is uncertain
• Repairing tools, dies, and spring steel
• Welding dissimilar metal combinations (excluding aluminum and copper alloys)
• Rebuilding worn components or laying an underlayment for hardfacing
• Welders using AC buzz box machines or lower-voltage equipment
• Shops that want strong, crack-resistant welds without fighting the slag afterward