StarBlaze HF 550LH
DIN EN 8555: E6-UM-60P
Impact Tough | Abrasion Resistant | Medium Alloy Hard Surface Build-Up
StarBlaze HF 550LH is a basic-type hard surfacing electrode designed for tough applications involving high impact, abrasion, and compressive stress. It delivers a pure weld metal hardness of 58–60 HRc, making it ideal for surfacing components subject to heavy wear and dynamic loading. Recommended for use on machine parts, beater bars, dredge teeth, scrapers, crusher jaws, and more.
- 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
- Pure weld metal hardness of 58–60 HRc
- Excellent resistance to abrasion, compression, and moderate impact
- Suitable for unalloyed and low-alloy base materials
- Consistent arc control with minimal spatter
- Ideal for surfacing critical wear-prone industrial components
Industries
- Mining and quarry operations
- Cement and aggregate equipment
- Earthmoving and road construction
- Agricultural and excavation tools
- Heavy machinery refurbishment
Processes
- Shielded Metal Arc Welding (SMAW / MMA)
- DC+ polarity recommended (~70V OCV)
- Usable positions: 1G/PA, 2F/PB, 2G/PC
- Best used with short arc and near-vertical electrode angle
- Multiple layers possible with appropriate interpass cooling
Additional Details
- Re-dry electrodes at 300°C for 2 hours if necessary
- Use a buffer layer (18/8Mn type) on crack-sensitive base metals
- Preheat high carbon and low alloy steels to 200–400°C as required
- Slow air cooling after welding recommended for metallurgical stability
Product Details
Typical Weld Metal Chemical Composition (%)
| C | Si | Mn | Cr | V | Mo | Fe |
| 0.50 | 1.0 | 0.50 | 9.0 | 0.60 | 0.80 | Rem. |
Typical Mechanical Properties (All Weld Metal)
| Hardness |
| 58-60 HRc |
Recommended Welding Parameters
| Diameter (mm) | Amperage Range (A) |
| 3.15 | 90-120 |
| 4.00 | 140-180 |
| 5.00 | 180-240 |
