StarBlaze Prime NiCrMo4
AWS A5.11: E NiCrMo-4 | EN ISO 14172: E Ni 6276 (Ni Cr 15 Mo 15 Fe 6W4)
Hastelloy C276 Equivalent | Extreme Corrosion Resistance | Austenitic Overlay Electrode
StarBlaze Prime NiCrMo4 is a nickel-based, low hydrogen electrode engineered for welding and overlay of highly corrosion-resistant Ni-Cr-Mo alloyed steels. Specially suited for surfacing and joining components requiring maximum protection against oxidizing media, the electrode withstands service temperatures up to 1100°C. Ideal for Alloy C-276 and similar composition steels, it provides excellent strength and elongation, maintaining weld integrity under aggressive chemical exposure.
Available Packs
Dimensions: 2.50 mm x 350 mm, 3.15 mm x 450 mm, 4.00 mm x 450 mm
Pack Sizes: 2.5 Kg Pouch, 5 Kg Box
Master Box: 20 Kg, 30 Kg, 40 Kg, Customisable packaging available on request
- Excellent corrosion resistance in oxidising, reducing, and sulphurous environments
- Fully austenitic and stable weld metal, resistant to embrittlement
- Suitable for cryogenic to extreme high temperatures (-196°C to +1000°C)
- Smooth arc characteristics, suitable for both joining and overlay
- Designed for use on Alloy 600, 800, 825, and high-nickel steels
- Pressure vessel and chemical tank manufacturing
- Nuclear and thermal power systems
- Oil and gas process equipment
- Petrochemical heat exchangers and furnace walls
- Dissimilar metal welds and protective surfacing
- Shielded Metal Arc Welding (SMAW / MMA)
- DC+ polarity recommended
- All-position usability
- Suitable for Alloy 600, Alloy 800, Alloy 825, and NiCr 21 Mo steels
- Capable of joining both similar and dissimilar high-performance alloys
- Re-dry electrodes at 250–300°C for 2 hours before use
- Preheating may be required based on base material thickness
- Clean joint area thoroughly before welding
- Stable mechanical properties even under extreme thermal cycling
Product Details
Typical Weld Metal Chemical Composition (%)
| C | Mn | Si | Cr | Mo | Nb | P | S | Fe | Ni | Structure |
| 0.04 | 0.40 | 0.25 | 22.0 | 9.0 | 3.5 | ≤ 0.015 | ≤ 0.015 | 2,50 | Rem. | Austenite |
Typical Mechanical Properties (All Weld Metal)
| Yield Strength
Rp (N/mm2) |
Tensile Strength
Rm (N/mm2) |
Elongation
A5 (%) |
Charpy Impact Value
ISO-V (J) RT |
Charpy Impact Value
ISO-V (J) -196°C |
| > 420 | > 760 | > 30 | 90 | 47 |
Recommended Welding Parameters
| Diameter (mm) | Amperage Range (A) |
| 2.50 | 50-70 |
| 3.15 | 80-100 |
| 4.00 | 100-140 |
| 5.00 | 140-190 |
