Cast Iron Electrodes
SUPERLINK CI(M)
A nickel-iron type electrode for welding grey, ductile and malleable cast irons and for joining cast iron to mild steel. The weld metal is stronger and more resistant to solidification cracking than pure nickel grades. Produces moderately hard deposits requiring carbide-tipped tools for post-weld machining. Cold welding technique (short beads) recommended. AC or DC.
Technical specifications
| Ni | Fe | C | Mn | Si |
|---|---|---|---|---|
| 35–60% | balance | ≤2.0% | 2.0–3.5% | ≤1.5% |
| Tensile strength | ≥380 MPa |
|---|---|
| Hardness | ~150–200 HB (machinable with carbide tools) |
| Notes | High crack resistance |
| Diameter | Current range |
|---|---|
| 2.5mm | 55–80A |
| 3.15mm | 80–110A |
| 4.0mm | 110–140A |
Welding procedure & parameters
DC+ (DCEP) or AC. All positions. Cold welding technique: short beads (25–40mm), allow to cool to hand-warm between passes. Preheat 150°C–200°C for complex/restrained sections. Typical amperages: 2.5mm: 55–80A; 3.15mm: 80–110A; 4.0mm: 110–140A.
Typical applications
Repair of grey iron engine blocks, pump housings, compressor casings, gearboxes. Joining cast iron to steel. Welding nodular/ductile and malleable cast iron. Repair of casting defects and cracks.
Storage & handling notes
Peening immediately after each bead while still hot is recommended to relieve stress. Avoid rapid quenching. Not suitable for white cast iron. Store dry.
More cast iron electrodes
SUPERLINK MONEL
ECuNi (equivalent)
A nickel-copper (Monel-type) electrode designed for welding cast iron to copper-nickel alloys and for repair of cast iron where corrosion resistance to brine, seawater, and mild acids is required.
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ENi-CI
Pure nickel cored electrode — the softest and most machinable of all cast iron electrode types.
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ECuSn-A (equivalent)
A phosphor bronze (Cu-Sn) electrode for braze welding of cast iron, copper alloys, and dissimilar metal joining.
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