Description
Gemini Ni55 — Product Information & Qualifications
Gemini Ni55 is a premium Ni-Fe welding electrode designed for all-position welding of cast iron and cast iron-to-steel joints. It produces a strong, ductile weld deposit with excellent machinability, making it ideal for repair, maintenance, and restoration applications.
The smooth, stable arc and refined bead appearance allow for precise work even on challenging cast iron surfaces, while the 55% Nickel / 45% Iron composition helps reduce cracking and ensures strong metallurgical bonding.
Welding Positions
✔️ Flat (⎺)
✔️ Horizontal (→)
✔️ Vertical (│)
✔️ Overhead (∩)
Mechanical Properties
| Property | Value |
|---|---|
| Yield Stress | 310 N/mm² |
| Tensile Strength | 450 N/mm² |
| Elongation (%) | 10% |
| Vickers Hardness (HV30) | 190 HV |
Chemical Composition (%)
| Element | % |
|---|---|
| Carbon | 0.90 |
| Nickel | 55% (from 55%Ni deposit) |
| Ferrous (Fe) | Balance (45% Fe deposit) |
Recommended Current Range (A)
Diameter: 2.6 mm
60–90 A
Diameter: 3.2 mm
80–120 A
Diameter: 4.0 mm
120–150 A
Applications
Ideal for:
-
Repair of cast iron components
-
Welding cast iron to steel
-
Engine blocks
-
Machine bases
-
Gear housings
-
Pump casings
-
Foundry repairs






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