STARBLAZE CI NM
A nickel-free, non-machinable cast iron electrode specifically designed for repairing difficult cast iron components contaminated with grease, oil, rust, burn damage, and casting defects. StarBlaze CI NM seals porosity-generating contaminants before finish welding with nickel-based electrodes and provides a superior solution for dirty or burnt cast iron repairs. Its fast-freeze weld metal minimises porosity and weld defects while offering excellent positional welding characteristics without the need for preheating.
Available Packs
Dimensions: 3.15 mm x 350 mm, 4.00 mm x 350 mm, 5.00 mm x 450 mm
Pack Sizes: 1 Kg Box, 2 Kg Box, 5 Kg Box
Master Box: Customisable packaging available on request
Uniquely welds greasy, rusty, and burnt cast iron
Fast-freeze weld metal minimises porosity and weld defects
No preheating required
Excellent positional welding characteristics
Nickel-free alloy formulation
Ideal for contaminated cast iron repairs
Colour closely matches cast iron after welding
Coefficient of expansion closely matches cast iron
Excellent anchoring and underlaying properties
Suitable for AC and DC+ polarity
Foundries and Casting Repair Shops
Automotive Reconditioning
Heavy Equipment Maintenance
Steel and Foundry Industries
Industrial Repair Workshops
Power Generation Equipment Maintenance
Mining and Cement Plants
General Maintenance and Repair Applications
Manual Metal Arc Welding (MMA/SMAW) of contaminated cast iron
Repair welding of oil-saturated cast iron
Foundry casting defect repair
Steel-to-cast iron joining applications
Underlaying and anchoring contaminated cast iron
Restoration of burnt and damaged castings
Designed for cast iron that is greasy, rusty, burnt, or contaminated
Recommended for furnace gates, oil-saturated cast iron, foundry casting repairs, and steel-to-cast iron welding
Ideal as an underlaying layer before finish welding with nickel electrodes
Fast-freeze action helps reduce porosity and weld defects
Provides excellent weld appearance with colour matching close to cast iron
Keep electrodes dry and avoid condensation
Re-dry electrodes at 200°C for 1 hour if required
Performs successfully without preheating
Product Details
Typical Mechanical Properties (All Weld Metal)
| Yield Strength Rp (N/mm²) | Tensile Strength Rm (N/mm²) | Elongation A5 (%) | Hardness (HRc) |
| ≥ 360 | ≥ 500 | ≥ 18 | 38 – 42 |
Recommended Welding Parameters
| Diameter (mm) | Amperage Range (A) |
| 3.15 | 90-120 |
| 3.20 | 90-120 |
| 4.00 | 120-160 |
| 5.00 | 160-220 |
Note: This TDS does not provide AWS/EN classification or weld metal chemical composition, so those sections have been omitted to stay consistent with the source data rather than inventing values.
