WELDFAST SERIES
SURFACING, OVERLAY AND HARDFACING APPLICATION
 
WELDALLOY I WELDALLOY V  
WELDALLOY II WELDALLOY VI  
WELDALLOY III WELDALLOY II  
WELDALLOY IV WELDALLOY MANGAN  
 
Product Name / Specification
Characteristics
Useful Welding Technique Technical Data Principal App. Areas
WELDALLOY I
For Exceptionally High Crack and
Heat Resistant Joints.
WELDALLOY I deposit has a high degree of
toughness and thus offers excellent resistance to rolling, sliding, friction and heavy impact. The weld bead is smooth and crack free. The slag is easy to remove.
Clean the damaged, worn out metal or cracks either by gouging or grinding. Use lowest possible current and short arc, for surfacing of
heavy sections or materials. With high carbon content, preheating may prove beneficial.
Hardness (As deposited) : 250-325 BHN
The electrode is useful for hard surfacing and
overlaying components and machine part which
require moderate hardness in combination with
good machinability. These include tractor sprockets,
gears, shaft, axles, pinion teeth, ropeway and tram car rails and wheels and many other similar applications.
Product Name / Specification
Characteristics
Useful Welding Technique Technical Data Principal App. Areas
WELDALLOY II
For Excellent Resistance to Rolling, Sliding,
Friction and Moderate Impact.
WELDALLOY II deposit has a high strength and
moderate toughness. Hence it is ideal for
combating heavy rolling and sliding friction involving only moderate impact. The electrode, welds with a stable arc depositing a very fine and evenly rippled bead. It can be used on mild steel, carbon steel and low alloy steel.
Clean the welding area of damaged, fatigued, worn out or cracked material. Use lowest possible current and short arc. Avoid excessive weaving. For base material with carbon content in excess of 0.3% use of buffer layer of WELDALLOY LH recommended.
Hardness (As deposited) : 28-35 RC
Since the electrode can be used in all welding
position it is ideal for field applications. The obvious fields of application include building up of worn out
rolls, anvils, crushing rolls, brake shoes, forging dies, articulate track, edges of bull dog blades, sprocket
wheels, pneumatic equipments, wheels flanges, chassis, idler, gear, pinion etc.
Product Name / Specification
Characteristics
Useful Welding Technique Technical Data Principal App. Areas
WELDALLOY III
Air Hardening Type Surfacing Electrode for
Severe Service Condition.
WELDALLOY III with a soft stable arc which is easy
to strike and restrike. The weld bead is smooth
and crack free. The microstructure of the deposit
consist of uniformly dispersed chromium carbides in predominantly martensitic matrix.
Clean the damaged, fatigued, worn out metal by
gouging or grinding. Use lowest possible current and short arc. It is often advisable for economic reasons as well as from metallurgical point of view to rebuild badly worn surfaces with tougher
electrodes like WELDALLOY LH, WELDALLOY I or
WELDALLOY II before applying top layer with
WELDALLOY III.
Hardness (As deposited) : 550-630 BHN
The typical microstructure of the deposit is ideally
suitable for hard surfacing parts and components
subjects to extremely severe service conditions. Major application include mill hammers for pulverizing coal, disintegrating iron ore as well as for earth moving equipments and agricultural machinery such as bucket teeth, coal chutes, scrapers, shovels etc.
Product Name / Specification
Characteristics
Useful Welding Technique Technical Data Principal App. Areas
WELDALLOY IV
Electrode with Chromium Carbides for Surfacing.
WELDALLOY III with a soft stable arc which is easy
to strike and restrike. The weld bead is smooth
and crack free. The microstructure of the deposit consist of uniformly dispersed chromium
carbides in predominantly martensitic matrix.
Grind the surface to clean and remove damaged
or fatigued material. Use short arc and avoid weaving. While surfacing, medium and carbon steels use WELDALLOY LH deposits as buffer layer. For cast irons, Use a buffer layer of WELDALLOY 521 or WELDALLOY LH. Normally, do not use more than two layers without an intermediate buffer. Relief checks may appear but these will not adversely affect abrasion resistance.
Hardness : 58-62 RC (on second Layer)
Application of this alloy are extensive in earth
moving equipments, brick and cement industries,coal and ash handling plants, thermal power plants,
bucket edges, pads, lips, teeth, conveyor screws, mixing wings, crushing hammers, jaw crushers, oil expeller worms, scraper blades, fan blades, exhaust
blades, scraper bars, sand washing installations,
agricultural machinery are some of the specific
applications.
Product Name / Specification
Characteristics
Useful Welding Technique Technical Data Principal App. Areas
WELDALLOY V
Electrode to Deposit Material Highly Resistant to Abrasion at Room Temperature as well as
at Elevated Temperature.
WELDALLOY V is a hard surfacing electrode with
high metal recovery. The deposit consist of high percentage of primary and secondary carbides, and has excellent resistance to heavy abrasion to metal to metal wear with moderate. Impact upto 5000C and resist scaling upto 10000C
Clean area by grinding to be welded. Remove fatigued, cracked, deformed material. For medium or high tensile steels, use buffer layer of
WELDALLOY LH. For high carbon or air hardenable steels, use buffer layer of WELDALLOY 980. Avoid using. More than two layers.
Hardness (As deposited) : 55-60 RC
Application of this alloy are extensive where high pressure, abrasion or metal to metal wear is involved like refractory press screw, brick press screw,
conveyor screw, dozer blades, bucket teeth and lips,
tube mil and rolling mill guides, wire straightening rolls and dies, pug mill knife, auger blades, boring
tools, cement die rings.
Product Name / Specification
Characteristics
Useful Welding Technique Technical Data Principal App. Areas
WELDALLOY VI
High Alloy Electrode for Extreme
Abrasion Resistance
WELLDALLOY VI is high alloy composition
electrode for excellent resistance to abrasion. The
bead has smooth appearance and takes high
polish during service. This highly polished surface
provides a very low coefficient of friction. The
electrode is ideal for steel parts requiring
resistance to severe abrasive wear.
Clean the area to be welded. Remove fatigued or damaged metal. For hardenable steels use a
buffer layer of WELDALLOY 980. A buffer layer of
WELDALLOY 521 may be beneficial when depositing on cast irons. Preheat the casting if necessary. Avoid using more than two layers.
Hardness : 28-62 RC
Application of this alloy are extensive in repairs and maintenance of earth moving machinery and other
equipments used in construction, mining, cement and agriculture industries, in coal and ash handling plants in thermal power plants etc. The deposit is
ideal to combat severe abrasion encountered in bucket lips, pads and tooth portion, fan blades, plow shears, scrapers, road rippers, industrial knife.
Product Name / Specification
Characteristics
Useful Welding Technique Technical Data Principal App. Areas
WELDALLOY II
Cobalt Base Alloy for High Temperature
Oxidation and Corrosion Resistance.
WELDALLOY VII is a smooth burning electrode for
depositing a dense, porosity free deposit with
exceptional wear, corrosion and oxidation resistance even at elevated temperature. The
weld deposit can be machined and ground to a
very fine finish. This favourably affects the coefficient
of friction.
Clean thoroughly the area to be welded. Preferably preheat the base metal to 200-250°C. Maintain interpass temperature. Cool slowly after welding to prevent cracking of the deposit. Stress relieve the base metal for best results.
Hardness : 38-42 RC
The electrode deposit is ideal for parts requiring superior resistance to corrosion and metal to metal
wear at ambient as well as at high temperature with or without moderate to severe impact such as hot
trimming dies, tong bits, bushings, automotive and pressure valves. Excellent under errosive conditions on valve seats.
Product Name / Specification
Characteristics
Useful Welding Technique Technical Data Principal App. Areas
WELDALLOY MANGAN
High Alloy Electrode for Extreme
Abrasion Resistance
WELDALLOY MANGAN is an electrode meant
specifically for build up, overlaying and
cushioning of Manganese steels subjected to
severe impact loading or under compression
loading.
Clean weld area from oil, dirt, scale etc. Remove damaged, fatigued portion by grinding. Use low current, short arc, back step and skip and skip
weld technique to avoid localized overheating. For surfacing austenitic manganese steels maintain interpass temperature to maximum 1000C. In order to reduce initial wear, deposit top layer with WELDALLOY III.
As deposited : 230-260 BHN.
After work Hardening : 500-550 BHN.
Excellent for use on bucket teeth, lips, crushers,
hammer, mill hammers, rock crusher rolls, shovel track pads and many such application. This electrode is economical for use on rail road tracks,
frogs, switches. The electrode has many application on various earth moving and construction components.
 
 
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