Triten™ Armalloy™ Hardfacing Electrode

RANGE SUMMARY

The Triten™ Armalloy™ range of tubular electrodes has been developed specifically for wear resistant hardfacing. The properties of the alloys making up the tubular electrode range have been engineered to provide extended service life at ambient and elevated temperatures in aggressive environments involving abrasion, erosion and impact. In addition to hardfacing sections of plant, Triten Armalloy™ grades 12, 23, 33, 34 and 37 can be used on compatible wear resistant overlay plates in the Triten and Trimay ranges.

Tubular electrode design - less distortion and dilution

The special tubular construction of Triten Armalloy™ electrodes has many practical advantages over extruded welding rods and hardfacing wires.

They require low operating currents, which produces less heat leading to less base metal penetration. This gives reduced distortion, minimises risk of burn-through and less dilution of the alloy overlay.

Low operating currents also allow hardfacing on thin sections right up to and around the edges of auger flights, scraper and mixer blades, and other worn sections.

Deposition rates can be increased by introducing a second electrode into the weld pool, for example, during cast welding procedures used to protect bolt heads, etc.

Reliable and efficient on-site performance

Unlike comparable extruded welding rods, the outer coatings of Triten Armalloy™ tubular electrodes are moisture resistant. They do not require special storage conditions, will not flake when damp, and resist mechanical damage. All electrodes can be used direct from the packet, without pre-baking with no need for de-slagging between runs and application is fast and efficient.

A unified stub end size enables all electrodes to be used in a standard holder. Hardfacing can be carried out using most portable AC or DC welders.

Triten Armalloy™ Hardfacing Alloys

The following information provides a summary of the Triten Armalloy™ tubular hardfacing electrode range showing nominal composition of the undiluted alloys. More detailed information is available on request.

TRITEN ARMALLOY 10 AND 12
Tip Colour: Armalloy 10 - Silver | Armalloy 12 - Mustard

These two tungsten carbide based alloys have been developed to provide a very high resistance to abrasion under low impact conditions. Armalloy 12 has a lower tungsten carbide content and slightly less abrasion resistance but provides an effective solution where cost is a factor.

Both grades are available in manual arc and oxy-fuel gas versions with the latter generally offering better impact resistance.

Typical Chemical Composition (undiluted weld metal)

Element Wt%

Grade	Cr	WC	HRC*
Armalloy 10	12.0	52.0	65-70
Armalloy 12	12.0	40.0	65-70

Microstructure
Tungsten Carbides (WC) and Fe-Cr-W carbides in an Fe-Cr-W martensitic matrix.

Typical examples of applications
Handling of soft minerals with medium to fine particle sizes. Coal crusher blades, scraper blades, conveyor screens, crusher bars, concrete mixer blades, wood chipper spouts and bed knives, brick and clay mill augers, oil drill tool joints and pan scrapers.

TRITEN ARMALLOY 16
Tip Colour: Black

A martensitic cast iron developed for low cost, general purpose protection in a wide range of moderate abrasion and impact conditions.

Typical Chemical Composition (undiluted weld metal)

Element	C	Cr	Mo	HRC*
Wt%	4.5	10.0	2.0	58-62

Microstructure
Martensitic cast iron.

Typical examples of applications
Conveyor screws, mixer blades, dredge pump and slurry parts, crusher parts, clay, cement and coal handling equipment.

TRITEN ARMALLOY 23
Tip Colour: Blue

An alloy with very high abrasion resistance at temperatures up to 650°C (1200°F) and an ability to withstand fine particle erosion. Not suitable for high impact conditions.

Typical Chemical Composition (undiluted weld metal)

Element	C	Cr	Mo	V	Nb	MW	HRC*
Wt%	5.5	19.0	5.0	1.0	5.0	2.5	60-64

Microstructure
Hyper-eutectic with primary chromium carbides and additional niobium carbides in an austenitic-eutectic matrix. The total amount of carbides is about 60 - 65%.

Typical examples of applications
Repairs to Triten T223X overlay plate, coke plant, burden areas of blast furnace charging devices, boiler fan blades, blast furnace deflecting plates, sinter plant hot crusher parts, hot sinter screens, exhaust fan blades in sinter and pelletizing plants.

TRITEN ARMALLOY 30, 33, 35
Tip Colour: Armalloy 30 - Red | Armalloy 33 - White | Armalloy 35 - Pink

A group of three alloys combining high abrasion resistance under moderate impact conditions. All grades can be deposited directly onto low carbon steels. Grade 30 and 35 can also be deposited onto grey cast iron and grade 33 directly on manganese steel.

Typical Chemical Composition (undiluted weld metal)

Element Wt%

Grade	C	Mn	Cr	Mo	V	B	HRC*
Armalloy 30	5.5	3.0	30.0	--	--	--	52-55
Armalloy 33	5.5	0.5	32.0	--	--	--	55-60
Armalloy 35	5.0	3.5	26.0	3.5	1.0	0.3	50-60

Microstructure
Hyper-eutectic with primary chromium carbide in an austenitic-eutectic matrix.

Typical examples of applications Repairs to Triten T200X overlay plate, palm oil extruders, coast screw conveyors, plough shares and agricultural equipment, coal pulverizing rolls, sand handling equipment, soft mineral crushing hammers, mantles and liners, quarry screen plates and brick manufacturing equipment.

TRITEN ARMALLOY 34
Tip Colour: Pale Green

Developed to offer excellent abrasion resistance in high velocity, fine particle applications in which erosive wear is a major problem.

Typical Chemical Composition (undiluted weld metal)

Element	C	Cr	Mo	V	B	HRC*
Wt%	4.0	25.0	2.0	0.5	1.75	58-62

Microstructure
Hyper-eutectic chromium carbides in a very fine grained martensitic-eutectic matrix.

Typical examples of applications
Repairs to Triten T211X overlay plate, fan blades, liner plates, impeller blades and housing.

TRITEN ARMALLOY 37
Tip Colour: Brown

An alloy developed for applications in which high abrasion is combined with moderate to low impact conditions.

Typical Chemical Composition (undiluted weld metal)

Element	C	Mn	Cr	Nb	V	HRC*
Wt%	5.0	1.0	23.5	7.0	1.0	55-66

Microstructure
Hyper-eutectic with primary chromium carbide in an austenitic-eutectic matrix.

Typical examples of applications
Repairs to Triten T237X overlay plate, ground nut oil expeller screws, screens and chutes in the mining and coal industries, siliceous coal grinding equipment, bucket lips and teeth of open cast mining wheel excavators an shovels, brick and clay mill augers.

TRITEN ARMALLOY 108
Tip Colour: Purple A general purpose joining, surfacing and buttering alloy that produces a crack-free deposit with high impact resistance and moderate to high abrasion resistance when work hardened. This alloy is less prone to embrittlement than straight C-13% Mn alloys.

Typical Chemical Composition (undiluted weld metal)

Element	C	Mn	Cr	V	HRC*
Wt%	0.65	12.0	14.0	1.0	200HB

Microstructure
Austenite.

Typical examples of applications All conditions where resistance to high impact is a primary requirement and is experienced in combination with abrasive wear from soft to medium hard minerals or metal to metal wear. Crusher jaws, crusher cones and mantels, crusher hammers and blow bars, toothed crusher rolls and railway crossings.

*HRC is Rockwell C Hardness, HB is Brinell Hardness
More details on the composition and properties of specific alloys are provided on individual specification leaflets available on request.

Triten Armalloy™ Hardfacing Alloys

Wear Resistance Diagram

Ranking Triten Armalloy compositions according to abrasion and impact resistance.

Electrode Data:

Element	6	8	11
Nominal Length mm	450	450	450
Nominal Length mm	450	450	450
Approx No. per kg*	13	7	4
Deposit Rate kg/hr	2	2-3	4-5
Amperages Min.	80	140	190
Amperages Max.	130	190	260

*Note: Grades 10 and 12 are heavier

Maximum recommended deposition:

Armalloy Grade	Maximum Thickness mm	Layers
10 & 12	5-6	2
16	15	3-4
23	10	2-3
30, 33, 35	10	2-3
34	10	2-3
37	10-12	3-4
108	Unlimited	Unlimited