StarBlaze HF 550
DIN EN 8555: E6-UM-60P
57–61 HRc | Impact & Abrasion Shield | Crusher-Grade Toughness
An extreme-duty hardfacing electrode engineered for abrasion-prone, high-impact surfaces. With a Cr-V-Mo enriched alloy matrix, STARBLAZE HF 550 forms an ultra-hard weld deposit resistant to cutting wear, grain erosion, and hammering. Ideal for crusher jaws, mixer blades, dredger components, and everything in-between. Designed for rebuilds that demand hardness—and hold it.
Available Packs:
Dimensions: 3.15 mm x 450 mm, 4.00 mm x 450 mm, 5.00 mm x 450 mm
- Pack Sizes: 2.5 Kg Pouch, 5 Kg Box
- Master Box: 20 Kg, Customisable packaging available on request
Key Features
- Weld metal hardness: 57–61 HRc
- Superior resistance to gouging, crushing, and slurry wear
- Cr-V-Mo alloyed deposit for extended service life
- Machinable only by grinding
- Low spatter and smooth, stable arc characteristics
- Suitable for heavy-duty rebuilds and wear-prone surface overlays
Industries
- Mining & Mineral Processing
- Cement & Aggregate Plants
- Scrap Shredders & Recycling Equipment
- Construction & Earthmoving Equipment
- Dredging Teeth & Pump Components
- Quarry & Crusher Maintenance
Processes
- Manual Metal Arc Welding (MMA / SMAW)
- Compatible with AC and DC+ polarity
- Welding positions: PA (flat), PB (horizontal fillet), PC (horizontal butt)
- Best used with a short arc and steady hand control
Additional Details
- Guide with a tight arc to reduce dilution and maximise hardness
- On crack-sensitive steels, use 18/8Mn buffer layer
- Preheat high-carbon or alloy steels to 200–400 °C as needed
- Slow cooling in still air post-weld improves microstructure
- Ideal for build-up layers on worn machinery and impact tools
Product Details
Typical Weld Metal Chemical Composition (%)
| C | Si | Mn | Cr | V | Mo | Fe |
| 0.60 | 0.40 | 0.60 | 7.00 | 0.60 | 0.70 | Rem |
Typical Mechanical Properties (All Weld Metal)
| Hardness |
| 57-61 HRc |
Recommended Welding Parameters
| Diameter (mm) | Amperage Range (A) |
| 3.15 | 90-120 |
| 4.00 | 140-180 |
| 5.00 | 180-240 |
