The T211X overlay alloy for steel plate has been developed for applications requiring high resistance against wear by high and low stress abrasion, as well as erosion combined with moderate to low impact.
TYPICAL PROPERTIES OF UNDILUTED T211X ALLOY
The properties given directly below refer only to the T211X 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)||4.9% C, 3% Mn, 33% Cr, +1%B|
|Microstructure||Hyper-Eutectic with M7C3 primary chromium carbides in a|
|martensitic eutectic matrix|
|Typical hardness range||57-62 Rc|
|Typical service temperature||Up to 650°C (1,200°F)|
TYPICAL PROPERTIES OF T211X 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:
T211X overlaid plates are used in many segments of industry: Steelworks, Dredging, Mining, Refineries, Cement, Glass, Timber, Power Generation Plants, Earth moving, Sugar Mills, etc which are basically the same as for T200X. T211X plates are however preferentially used in situations of small particle impingement and erosion.
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
- Feed pipes and lift pipes
- Hopper liners
- Riser lines
- 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 T211X PLATES
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.
T211X 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 out using matching manual electrodes or corresponding tubular wires.
For more details, please consult Triten’s Fabrication Guide.
FURTHER SERVICES AVAILABLE FROM KUBES ALLOYS
Kubes Alloys’ access to Triten’s proprietary technology, technical knowledge and 50 years of 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 and advice on all aspects of the selection and fabrication of Triten overlay plates ma be obtained by contacting Kubes Alloys directly.