STARBLAZE PRIME 550 LH
DIN EN 8555: E6-UM-60P
Low Hydrogen Hardfacing, Impact Resistant, Superior Abrasion Resistance
A basic type hard surfacing electrode designed for producing tough-hard weld deposits with excellent resistance to impact, compression, and severe abrasion. StarBlaze PRIME 550LH is specifically developed for hardfacing unalloyed and low alloy steels subjected to heavy wear conditions and higher tensile stresses. The low hydrogen basic coating provides crack-resistant deposits with superior toughness, making it suitable for rebuilding and protecting highly stressed wear components operating in mining, earthmoving, and material handling applications.
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, 4 Kg Box, 5 Kg Box
Master Box: 20 Kg, 30 Kg, 40 Kg, Customisable packaging available on request
Low hydrogen basic coating
Excellent abrasion resistance
High impact resistance
Superior resistance to compression wear
Hardness of 58–60 HRc
Crack-resistant weld deposits
Suitable for hardfacing unalloyed steels
Suitable for hardfacing low alloy steels
Excellent toughness under severe service conditions
Reliable performance in high-stress wear applications
Suitable for DC+ and AC (~70V OCV) operation
Mining and Quarrying
Earthmoving Equipment Industry
Cement Industry
Steel Processing Plants
Construction Equipment Manufacturing
Material Handling Industry
Coal Mining Industry
Heavy Engineering Industries
Manual Metal Arc Welding (MMA/SMAW) hardfacing applications
Wear-resistant overlay welding
Rebuilding worn machine components
Abrasion resistant surfacing
Impact resistant hardfacing
Maintenance and reclamation welding
Recommended for machine parts, dredge teeth, beater bars, scrapers, conveyor worms, rock drills, drill bits, coal cutter blades, excavator teeth, mixer arms, crusher jaws, and crusher cones
Guide electrode almost vertically using a short arc
For crack-sensitive materials, a buffer layer of 18/8 Mn type electrode is recommended
Low alloy and high carbon tool steels should be preheated to 200–400°C depending on composition and thickness
Allow slow cooling in still air after surfacing
Re-dry at 300°C for 2 hours if necessary
Designed for severe abrasion and impact wear conditions
Product Details
Typical Chemical Composition (%)
| C | Si | Mn | Cr | V | Mo | Fe |
| 0.50 | 1.00 | 0.50 | 9.00 | 0.60 | 0.80 | Balance |
Typical Mechanical Properties (All Weld Metal)
| Property | Value |
| Hardness (HRc) | 58 – 60 |
Recommended Welding Parameters
| Diameter (mm) | Amperage Range (A) |
| 3.15 | 90-120 |
| 4.00 | 140-180 |
| 5.00 | 180-240 |
