Red Dog T200X™

GENERAL DESCRIPTION

The T200X overlay alloy for steel plate has been developed for applications requiring high resistance against wear by abrasion combined with moderate to low impact.

Since its introduction to the market place, Red Dog T200X has established itself as the leading general purpose wear resistant alloy, meeting a wide variety of requirements in a large number of fields of application and industry segments.

TYPICAL PROPERTIES OF UNDILUTED T200X ALLOY

The properties given directly below refer only to the T200X alloy, undiluted by base material (substrate).  These properties differ from the properties of actual overlay deposits on a particular substrate, examples of which are given in the next section.

Type of alloy	Iron based
Group of alloys	High chromium iron
Nominal composition (undiluted)	5.4% C, 3.5% Mn, 34% Cr
Microstructure	Hyper-Eutectic with M7C3 primary chromium carbides in an austenitic eutectic matrix
Typical hardness range	55-60 Rc
Cracking	Yes
Abrasion resistance	Excellent
Impact resistance	Moderate
Typical service temperature	Up to 650°C (1,200°F)
Machining	Only grinding
Flame cutting	No

TYPICAL PROPERTIES OF T200X OVERLAID PLATES

Standard Base plate grades

in the USA:	ASTM A-36
in the UK	BSEN 10025:1993 Fe 430A (BS 4260-43A)

Typical chemical compositions and hardnesses of single and double layer overlays:

	Element	C	Mn	Si	Cr	Hrc
Single layer	Wt%	4.3	2.7	0.4	28	54-56
Second layer	Wt%	4.8	3	0.5	30	55-58

AREAS OF INDUSTRIAL USE

T200X overlaid plates are used in many segments of industry: Steelworks, Dredging, Mining, Refineries, Cement, Glass, Timber, Power Generation Plants, Earthmoving, Sugar Mills, etc.

TYPICAL FIELDS OF APPLICATION

• Pump shells and pump impellers

• Suction and discharge dredge pipes

• Shovel bucket wear liners

• Screw conveyors

• Chutes and decks of all types and sizes

• Vibratory feeders

• Chain conveyor wear plates

• Cyclones

• Feed pipes and lift pipes

• Hopper liners

• Riser liners

• Crusher liners

• Fan blade and housing liners

• Coal mill classifier cones

• Catalyst feed nozzles

• Pulverized fuel systems

• Auger flights

• Bottom ash screws

• Chopper hoods

• Grizzly and breaker bars, etc.

MACHINING, CUTTING, WELDING AND REPAIR OF T200X PLATES

The composition, microstructure and hardness of T200X plates precludes the use of conventional methods of machining.

Edges and surfaces may be ground with an abrasive disk.

The high chromium content of the alloy is incompatible with the use of oxy-fuel flame cutting processes.

Plasma-arc is the generally preferred method of cutting.  The quality of plasma cutting is excellent, in terms both of precision and cleanliness.

Localized removal of the overlay material is possible using the Carbon-Arc/Air process.

T200X plates can be welded to themselves or to any weldable substrate structural material using mild steel low hydrogen welding consumables.

Structural welding must be carried out on the mild steel side of the plate.

Local repairs, or reconstruction of the overlay at the location of welded joints can be carried ou using matching manual electrodes or corresponding tubular wires.

For more details, please consult Red Dog's Fabrication Guide.

FURTHER SERVICES AVAILABLE FROM KUBES ALLOYS

Kubes Alloys' access to Red Dog's proprietary technology, technical knowledge and 50 years experience as a leader in the field, provides the basis from which to select base plate qualities and overlay alloy properties to suit specific, non-standard requirements.  This service is available from Kubes Alloys' Technical Department, which will be pleased to assist.

Kubes Alloys also has the specialized in-house capability of fabricating a wide range of components and structures, notably to ASME Code requirements, from overlaid plates.

TECHNICAL SUPPORT

Technical support and advice on all aspects of the selection and fabrication of Red Dog overlay plates may be obtained by contacting Kubes Alloys directly.