Duroxite® 300 Plate
Wear Plate Overlay Plate Hardfacing Plate Abrasion Resistant Plate Steel Plate Clad Plate Chromium Carbide Plate Weld Overlay Plate Impact Resistant Plate Wear-Resistant Plate High-Strength Plate Overlay Steel Plate Heavy-Duty Wear Plate Mining Wear Plate Toughened Steel Plate Corrosion-Resistant Plate Structural Wear Plate Dual Metal Wear Plate
Duroxite® 300 is a wear-resistant overlay steel plate designed to provide exceptional protection against severe sliding wear in both dry and wet (slurry) abrasive environments. This wear plate performs effectively at ambient temperatures as well as elevated temperatures up to 1100°F (600°C). It is available in both single and double-layer overlay plates.
The Duroxite® 300 formulation incorporates specially designed abrasive materials with unique glass-forming melt chemistry, enabling high undercooling. The overlay contains a substantial volume of ultra-fine tungsten-niobium-molybdenum-rich complex borocarbides, with a grain size refined to 500 nm. These borocarbides are fully integrated into a ductile matrix, preventing premature delamination, crack formation, and bridging. This results in a product that offers enhanced service life and maintains exceptional toughness, even in the most demanding sliding wear conditions. Duroxite® 300 serves as an excellent alternative to tungsten carbide hardfacing plates.
Key Benefits
- Provides exceptional wear resistance in both dry and wet abrasive environments, combined with high toughness.
- A cost-effective alternative to tungsten carbide, offering similar service life with improved impact resistance.
- The overlay plate thickness is reduced compared to traditional abrasion-resistant plates, resulting in a lighter product while extending service life.
- Absorbs 25% more impact energy than conventional chromium carbide plates, as demonstrated in the continuous high-impact lab test.
- Offers uniform through-thickness hardness of 67 to 70 HRC for both single and multi-layer weld overlay plates, and retains a high hardness of around 60 HRC even after exposure to temperatures up to 1100°F (600°C).
- Delivers consistent wear resistance from the surface to 75% of the overlay thickness.
Typical Applications
Duroxite® 300 is ideal for various industries. Some common applications for wear-resistant plates in these industries include:
| Mining | Crusher rolls, Skip liners, Slurry pipes, Slurry pumps, Conveyor chains, Excavator bucket liners |
|---|---|
| Cement | Fan blades, Deflector blades, Cranker crushers |
| Oil sands | Surge bins, Feed chutes, Slurry pipes, Slurry pumps |
| Steel | Ore chutes |
| Power | Screw augers, Wear liner plates, Ash handling equipment liners |
| Agriculture | Grain shredding hammers, Sugar mill knives, Row crop sweeps |
| Oil and Gas | Fracking blender pumps |
| Construction | Snow plow shoes, Demolition tools |
Standard Dimensions
| Metric unit | Metric unit |
|---|---|
| 3 mm on 6 mm | 6 mm on 6 mm |
| — | 6 mm on 8 mm |
| — | 6 mm on 10 mm |
| — | 6 mm on 12 mm |
Standard plate sizes
| Metric unit | Imperial unit |
|---|---|
| 1.2 m x 2.4 m | 4′ x 8′ |
| 1.5 m x 3.0 m | 5′ x 10′ |
| 1.8 m x 3.0 m | 6′ x 10′ |
Mechanical Properties
| Number of overlay passes | Typical surface hardness1) (HRC) | Typical surface hardness1) (HV) | Surface (g max) |
75 % depth of overlay 3) (g max) |
20o Impingement angle (g typical) |
45o Impingement angle (g typical) |
|---|---|---|---|---|---|---|
| Single pass | 67 – 70 | 925 – 1075 | 0.10 | 0.10 | 0.0329 | 0.0591 |
| Double passes | 67 – 70 | 925 – 1075 | 0.10 | 0.10 | 0.0329 | 0.0591 |
1) Surface hardness is measured on machined flat surface just below overlay surface.
2) ASTM G65 is a standard test measuring sliding abrasion resistance using a dry sand/rubber wheel apparatus. ASTM G65-Procedure A is the most severe test method.
3) ASTM G65 wear test is conducted at 75% depth of the overlay materials to ensure consistently good wear resistance from the top surface through to the depth of 75% of the overlay.
4) Duroxite 300 outperforms typical CCO in an SJE test. Typical CCO loses 0.0689 g at 20° and 0.0995 g at 45° impingement angles in the same test. For more information about Duroxite® 300 and its performance in a Slurry Jet Erosion Test, please see the Duroxite® Brochure – The Latest in Overlay Technology available at ssab.com.
Microstructure
Duroxite® 300 overlay steel plates feature an ultra-fine complex borocarbide phase, with a size of about 500 nm, embedded in a ductile matrix. The borocarbides typically make up 60 to 70% of the volume, creating a uniform, hard matrix. SEM (Scanning Electron Microscopy) and EDS (Energy Dispersive Spectrometry) analysis of the Duroxite® 300 clad plate reveal that the refined borocarbides are tungsten-niobium-molybdenum-rich, along with chromium-rich borocarbides, all dispersed within an iron-based matrix. These ultra-fine borocarbides are roughly 200 times smaller than traditional chromium carbides.
Tolerances
Thickness
Overall and overlay thickness tolerances can be guaranteed within ±10% of specified thickness.
Flatness
Plate flatness tolerance can be guaranteed as shown below over 1.5 m (5’) plate length for plate dimensions less than or equal to 1.5 m (5’) x 3.0 m (10’).
Metric unit |
|
|---|---|
| Metric unit | 1.5 m x 3.0 m |
| 5 mm on 8 mm | 12 mm |
| 6 mm on 6 mm | 12 mm |
| 10 mm on 10 mm | 6 mm |
For custom sizes, please consult your local sales representative or Hardox® Wearparts center for flatness guarantees.
Delivery
Duroxite® 300 is supplied in an as-welded condition.
Fabrication and Other Recommendations
Welding, cutting, forming and machining
Recommendations can be found in the Duroxite® Products brochure, or consult your local technical support representative.
Safety precautions
Welding or cutting Duroxite® products generates gases and harmful fumes that are chemically complex and challenging to categorize. The primary toxic component in these fumes is hexavalent chromium. It is recommended to use appropriate exhaust ventilation systems, fume-extraction torches, as well as suitable protective clothing and respiratory protection for operators.