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

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: Snowplow shoes, demolition tools

Mechanical Properties

Surface Hardness

Number of overlay passes	Typical surface hardness ¹⁾ (mm)
Single and dounle passes	67 to 70 HRC (925 to 1075 HV)

¹⁾Surface hardness is measured on machined flat surface just below overlay surface.

Wear Propertie

Number of overlay passes	ASTM G65 - Procefure A weight loss 2⁾
	Surface	75% depth of overlay 3⁾
Single pass	0.10 g maximum	0.10 g maximum
Double passes	0.07 g maximum	0.07 g maximum

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

Standard Dimensions

Standard overlay thickness		Standard plate sizes
Single pass		Multiple passes
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'

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.