Duroxite® 300 Wire
Hardfacing Wire,Wear-Resistant Welding, Wire Flux-Cored Wire,Abrasion-Resistant Wire,High-Performance Wire,Slurry Wear Wire,Impact-Resistant Welding Wire,Welding Consumables,Hardfacing Flux-Cored Wire,Wear-Resistant Overlay Wire
Duroxite® 300 Wire is a flux-cored welding wire specifically designed for hardfacing applications. It is used to protect components from extreme sliding wear. The weld deposit of Duroxite® 300 Wire is made from a specially engineered mix of abrasive materials and features a uniform glass-forming melt chemistry that allows for high undercooling. The wire contains a unique, high volume of ultra-fine tungsten-niobium-molybdenum-rich complex borocarbide phase, with a grain size refined to 500 nm. These borocarbides are fully integrated into a ductile matrix, preventing issues like premature pull-out, delamination, crack formation, and bridging. This results in a product that significantly enhances service life while maintaining high toughness in demanding sliding wear environments.
Duroxite® 300 Wire is suitable for both single and double-layer deposits, using either stringer or oscillation beads. It naturally forms stress-relief cracks after welding. Preheating, inter-pass temperature control, and post-weld heat treatment should be applied according to the base metal’s requirements. If welding fumes are a concern, it is recommended to use a gas-shielded arc welding process. A slight drag angle is preferred for optimal performance during welding. When welding in downhill or uphill positions, a lower wire feed speed and voltage are advised. Duroxite® 300 Wire is designed for welding on carbon steel or low-alloy steel substrates that undergo severe wear, in both dry and wet (slurry) abrasive environments, and can withstand temperatures up to 600°C (1100°F). It is not compatible with austenitic alloys. Duroxite® 300 Wire offers an excellent alternative to tungsten carbide hardfacing wire.
Key Benefits
- Offers exceptional wear resistance in both dry and wet abrasive environments, combined with high toughness.
- A cost-effective alternative to tungsten carbide hardfacing wire, providing equivalent service life with superior impact resistance.
- Delivers consistent wear resistance from the surface down to 75% of the overlay depth.
- Features uniform through-thickness hardness of 67 to 70 HRC for both single and double-layer overlays.
- Requires a thinner overlay compared to traditional chromium carbide overlay (CCO) or complex carbide overlay, resulting in a lighter product while enhancing service life.
Typical Applications
Duroxite® 300 Wire is mainly designed for hardfacing any steel substrates (not compatible with austenitic alloys) undergoing extremely severe wear in mining, power generation, cement, oil sand, steel production, waste handling, and pulp and paper industries. Typical examples 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
| Standard Diameter (Metric) |
|---|
| 1.6 mm |
Mechanical Properties
| ASTM G65 – Procedure A weight loss 2) | Typical weld metal surface hardness | Slurry jet erosion weight loss 4) | |||
|---|---|---|---|---|---|
| Number of overlay passes | Surface (g max) | 75 % depth of overlay 3) (g max) | Weld deposit on mild steel 1) (HRC) | 20o Impingement angle (g typical) | 45o Impingement angle (g typical) |
| Single pass | 0.10 | 0.10 | 67 – 70 | 0.0329 | 0.0591 |
| Double passes | 0.10 | 0.10 | 67 – 70 | 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.
Test results for mechanical properties
Test results for mechanical properties, deposit overlay chemical composition, surface hardness, and ASTM G65-A weight loss were obtained from a weld produced and tested according to prescribed standards, and should not be assumed to be the expected results in a particular application or weldment. Actual results will vary depending on many factors, including, but not limited to, weld procedure, substrate chemistry and working temperature, weldment design and fabrication methods. Users are cautioned to confirm by qualification testing, or other appropriate means, the suitability of any welding consumable and procedure before use in the intended applications.
Chemical Composition
| Typical weld deposit chemical composition (wt. %) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| C | Mn | Si | Cr | W | B | Mo | Nb | Al | Fe |
| < 5.0 | < 5.0 | < 2.0 | < 20.0 | < 10.0 | < 5.0 | < 10.0 | < 10.0 | < 5.0 | Balance |
Welding recommendations
| Welding Conditions | ||
|---|---|---|
| Current Type | Shielding Gas | Welding Positions |
| DCEP (Direct current electrode positive) | Open arc (no shielding) | Flat, horizontal, half up, half down |
| DCEP (Direct current electrode positive) | 75% Ar / 25% CO2 98% Ar / 2% O2 | Flat, horizontal, half up, half down |
Welding parameters recommendations
| Shielding | Diameter | Amperage (A) | Voltage (V) | Wire Feed Speed | Stick-Out |
|---|---|---|---|---|---|
| Open arc (no shielding) | 1.6 mm (0.0625 in) | 220 | 24 – 25 | 7.0 m/min | 25 mm |
| Gas shielded | 1.6 mm (0.0625 in) | 220 | 24 – 25 | 7.0 m/min | 20 mm |
Delivery Conditions
| Standard Package | Diameter (Metric) | Weight (Metric) |
|---|---|---|
| Type | 1.6 mm (0.0625 in) | 15 kg |
| Spool | 1.6 mm | 15 kg |
Fabrication and Other Recommendations
The welded overlay components can be processed through welding, cutting, forming, and machining. For detailed recommendations, refer to the Duroxite® Product 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 substance in the fumes is hexavalent chromium. It is recommended to use proper exhaust ventilation systems and fume-extraction torches, along with appropriate protective clothing and respiratory protection for operators.
