StarBlaze HF 650B (SPL)
DIN EN 8555: E6-UM-55G | DIN EN 14700: EFe2
High Hardness | Abrasion Resistant | All-Position Martensitic Overlay
StarBlaze HF 650B (SPL) is a high-alloyed, basic coated hardfacing electrode formulated to deliver a tough, non-machinable martensitic weld deposit. It offers superior resistance to abrasion and moderate impact, especially under metal-to-mineral wear conditions. With excellent slag removal, low spatter, and all-position usability, it is ideal for extending service life of heavy-duty industrial components.
- 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, 30 Kg, 40 Kg, Customisable packaging available on request
Key Features
- Hardness range: 55–59 HRc for robust wear protection
- Excellent abrasion resistance under severe service conditions
- All-position welding with smooth arc and self-peeling slag
- Suitable for hard surfacing on carbon and alloy steel bases
- Can be ground with hard tools; not machinable by standard methods
Industries
- Mining and mineral processing equipment
- Cement, steel, and heavy manufacturing sectors
- Dredging, earthmoving, and construction machinery
- Wear-prone parts like blades, sprockets, guides, and skip bins
Processes
- Shielded Metal Arc Welding (SMAW / MMA)
- DC+ polarity recommended (~70V open circuit)
- All-position usability
- Ideal for crane wheels, scrapper blades, gear teeth, and more
- Max 4-layer buildup recommended for best performance
Additional Details
- Preheat between 200–350°C; interpass up to 400°C for thick sections
- Use stringer beads for edge/corner buildup; limit weave width (12–20 mm)
- Weld metal is non-machinable – use grinding for final finish
- Suitable for both overlay and rebuild operations
Product Details
Typical Weld Metal Chemical Composition (%)
| C | Si | Mn | Cr | W | Mo | Fe |
| 0.40 | 1.20 | 1.20 | 7.00 | 0.40 | 0.80 | Rem. |
Typical Mechanical Properties (All Weld Metal)
| Hardness |
| 55 – 59 HRc |
Recommended Welding Parameters
| Diameter (mm) | Amperage Range (A) |
| 3.15 | 90-120 |
| 4.00 | 140-180 |
| 5.00 | 170-220 |
