Duroxite® 200 Pipe

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General Product Description

Duroxite® 200 Pipe is manufactured by depositing specially formulated abrasive materials on a mild steel base using a traditional arc welding process. The overlay material is composed of primary chromium-rich carbides and refined multiple-alloy complex carbides dispersed evenly in a ductile eutectic austenite matrix. The hardfacing overlay pipe is designed with extreme wear resistance for working in a severe sliding wear environment. Duroxite® 200 Pipe is available with single or double overlay passes. Schedule 40 and Schedule 80 steel pipe as well as tubing can be used as base pipes to make Duroxite® 200 Pipe. Duroxite® 200 Pipe can be fabricated as square-to-round transitions, elbows, T or Y-shaped, or as long sweeps.

Key Benefits

  • Same wear resistance guaranteed from surface down to 75% of the overlay
  • Optimal carbide composition to provide good combination of wear resistance and homogenous bonding
  • Longer service life and better wear resistance compared to traditional chromium carbide hardfacing pipe

Typical Applications

Duroxite® 200 Pipe is widely used in the mining, cement, oil sands, dredging, recycling and steel production industries. Some specific applications include:

Mining

Slurry pumps, chutes

Cement

Chutes, slurry pumps

Dredging

Dredging pipes

Steel

Air ducts, carbon injection pipes, suction lines, troughs

For more information on applications see the Duroxite® Product brochure.

Standard Dimensions

Diameter
Metric unit
Diameter
Metric unit
50 - 150 mm
200 - 600 mm
600 - 900 mm
Length
Metric unit
0.9 - 1.0 m
0.9 - 3.0 m
1.8 - 3.0 m
Other Custom Specifications
- All available gauges > Schedule 40 steel pipe
- Lengths cut or fabricated as needed
- Stainless steel and other pipe grades available
- Custom diameters, lengths and gauge sizes are available upon request.
- Diameters larger than 0.9 m can be fabricated from formed Duroxite® 200 plate.

Mechanical Properties

Wear properties
Number of overlay passes
Wear properties
Number of overlay passes
Single pass
Wear properties
Typical surface hardness1)

(HRC)
57 - 60
Wear properties
Typical surface hardness1)

(HV)
630 - 700
ASTM G65 – Procedure A weight loss 2)
Surface
(g max)
0.19
ASTM G65 – Procedure A weight loss 2)
75 % depth of overlay 3)
(g max)
0.19
Wear properties
Number of overlay passes
Wear properties
Number of overlay passes
Double passes
Wear properties
Typical surface hardness1)

(HRC)
60 - 65
Wear properties
Typical surface hardness1)

(HV)
700 - 850
ASTM G65 – Procedure A weight loss 2)
Surface
(g max)
0.12
ASTM G65 – Procedure A weight loss 2)
75 % depth of overlay 3)
(g max)
0.12

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

2) ASTM G65 - Procedure A weight loss, 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 - Procedure A weight loss, 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.

Microstructure

The microstructure of Duroxite® 200 pipes contains primary chromium-rich carbides and refined multiple-alloy complex carbides with a typical hardness of 2500 to 3000 HK*) dispersed evenly in a ductile eutectic austenite matrix. The typical volume fraction of primary chromium-rich carbides is maintained between 30 to 40% with 7 to 10% of multi-alloy complex carbides.

*) HK is the Knoop microhardness used primarily for very brittle materials.

Fabrication and Other Recommendations

Welding, cutting, forming and machining

Workshop recommendations can be found in the Duroxite® overlay brochure or you can consult your local technical support representative for more information.

Safety precautions