Duroxite® 300

Duroxite® 300 is an iron-based steel alloy overlay deposited on mild steel. It is designed for extremely severe sliding wear for both dry and wet (slurry) abrasive environments.

The overlay contains a unique high volume of ultra-fine borocarbides with a grain size refined down to 500 nm. The borocarbides are completely wetted in a ductile matrix resulting in a product with significantly improved service life that maintains high toughness in extreme sliding wear applications. Duroxite® 300 is an excellent alternative to tungsten carbide overlay.

Key Benefits

• Extreme wear resistance in dry and wet abrasive environments with a high degree of toughness
• Cost effective alternative to tungsten carbide with equivalent service life and better impact resistance
• Overlay thickness is reduced compared to traditional overlays resulting in a lighter weight product while increasing service life
• Absorbs 25% more impact energy than the traditional chromium overlay plate as measured by the continuous high impact lab test
• Has uniform through-thickness hardness of 67 to 70 HRC for single and multiple-layer overlay. Maintains a high hardness of approximately 60 HRC after exposure to high temperatures up to 1100°F (600°C)
• Maintains a consistent wear resistance from surface down to 75% of the overlay.

Typical Applications

Duroxite® 300 is suitable for use in industries such as mining, cement, oil sands, steel production and several others. Some specific applications include:

• Mining: Crusher rolls, skip liners, slurry pipes and pumps, conveyor chains, excavator bucket liners
• Cement: Fan blades, deflector blades, cranker crushers
• Oil Sands: Surge bins, feed chutes, slurry pipes and pumps
• Steel: Ore chutes
• Power: Screw augers, wear liner plates, ash handling equipment liners
• Agriculture: Grain shedding hammers, sugar mill knives, row crop sweeps
• Oil and Gas: Fracking blender pumps
• Construction: Snow plow shoes, demolition tools

Contact us

Hardox® Wearparts is the leading manufacturer of wear parts and wear services in the world. With more than 300 centers, and in more than 75 countries, there is always a Hardox® Wearparts Center close to you.

Contact your local partner today for more information about Duroxite®.

Hardox® Wearparts Centers

Duroxite® 300 Datasheet

Duroxite® 300

Duroxite® 300

Standard Dimensions

Standard overlay thicknesses				Standard plate sizes
Single pass		Double passes		Standard plate sizes
Metric unit	Imperial unit	Metric unit	Imperial unit	Metric unit	Imperial unit
3 mm on 6 mm	1/8’’ on 1/4’’	6 mm on 6 mm	1/4’’ on 1/4’’
		6 mm on 8 mm	1/4’’ on 5/16’’	1.2 m x 2.4 m	4’ x 8’
		6 mm on 10 mm	1/4’’ on 3/8’’	1.5 m x 3.0 m	5’ x 10’
		6 mm on 12 mm	1/4’’ on 1/2’’	1.8 m x 3.0 m	6’ x 10’

Custom thicknesses and other plate sizes are available upon request.

Mechanical Properties

Surface Hardness

Number of overlay passes	Typical surface bulk hardness ¹⁾
Single and double passes	67 to 70 HRC (925 to 1 075 HV)

^₁₎_{Surface hardness is measured on machined flat surface just below overlay surface.}

Number of overlay passes	ASTM G65 – Procedure A weight loss²⁾
Number of overlay passes	Surface	75% depth of overlay³⁾
Single pass	0.10 g	0.10 g
Double passes	0.07 g	0.07 g

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 top surface through to the depth of 75 % of the overlay.}

Microstructure

Duroxite® 300 overlay contains an ultra-fine complex borocarbide phase down to approximately 500 nm in a ductile matrix. The typical volume fraction of borocarbides is maintained between 60 to 70% to form a uniform hard matrix. The SEM (Scanning Electron Microscopy) / EDS (Energy Dispersive Spectrometry) analysis of the Duroxite® 300 overlay confirms that the refined borocarbides are tungsten-niobium-molybdenum-rich borocarbides, and chromium-rich borocarbides dispersed in an iron- based matrix. The ultra-fine borocarbides are approximately 200 times finer than the traditional chromium carbides.

Duroxite 101 Microstructure

Tolerances

Thickness

Overall and overlay thickness tolerances can be guaranteed within ±10% of specified thickness.

Flatness

Plate flatness tolerance can be guaranteed within ±3 mm (±1/8”) over 1.5 m (5’) plate length for plate dimensions equal to or less than 1.5 m (5’) x 3.0 m (10’). For plates greater than 1.5 m (5’) wide by 3.0 m (10’) long, the plate flatness tolerance can be guaranteed within ±25 mm (±1”).

Delivery Conditions

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® Product brochure, or consult your local technical support representative for more information.

Forming Recommendations

The following are forming recommendations for Duroxite® 300.