HARD FACING WELDING ELECTRODES
LH 708
Hot work tool steel electrode
TECHNICAL DATA
Hardness (as welded) 41-46 HRC
(after hardening) 49-51 HRC
(after annealing) 21-24 HRC
TYPICAL APPLICATIONS
Used for repair of tools of similar materials or fabrication of hot work tools of carbon steels or low alloy steels, dies, stampers for non-ferrous metals, saddle tracks, forging hammers, distributor pins, slides, hot shear blades, trimming dies, etc.
LH 710
Electrode for tough and wear-resistant against friction
TECHNICAL DATA
Hardness: 29-35 HRC
TYPICAL APPLICATIONS
Surfacing of parts subject to wear by friction and mild impact. Rims, carbon-alloyed rails, dies, striking tools, rolling surfaces, sliding surfaces subject to heavy wear, stampers, etc. also ideally suited for construction & mining machinery parts like drive sprockets, rollers, concrete mixer blades, pump shaft, conveyor, screws, pinions and girth gear. The right choice for providing buffer layers where friction, mild impact and abrasion occur together.
LH 710 BF
Specially designed electrode for surfacing of dies and tools in forging industry
TECHNICAL DATA
Hardness: 38-42 HRC
TYPICAL APPLICATIONS
Forging dies for filling all types of die impressions or cavities. Joining and buildup on all drop-forging tools such as punches, dies, inserts, etc. Repair of damaged or worn out profiles. Salvage of scrapped / undersized die blocks by rebuilding totally with weld metal.
LH 713
Austenitic manganese steel electrode for high impact resistance
TECHNICAL DATA
Hardness as welded 17 HRC
work hardened 40-45 HRC
TYPICAL APPLICATIONS
For joining manganese steel/ Had field steel parts and hardfacing of parts subject to heavy impact and stress. Recommended for crushing equipment parts like rocks, jaws, cones, gyratory crushing mantles, excavator teeth, manganese rails, hammers, buckets, etc.
LH 714 S
High deposition manganese steel electrode
TECHNICAL DATA
UTS: 80-85 kgf/mm2
Hardness as welded: 17-20 HRC
work hardened: 42-50 HRC
Metal Recovery: 140%
TYPICAL APPLICATIONS
For joining manganese steel parts, hard facing of parts subject to heavy impact and stress. For all position welding of 14% Mn steels, armour steels, carbon steels, Had field Steel. Ideal as buffer layers before surfacing on 14% Mn steels, hard or unidentified steels. Very thick build-ups possible without cracking. Specially developed for mining industry.
LH 715
Hardfacing Electrode with high speed steel deposit
TECHNICAL DATA
Hardness as welded 59-61 HRC
work hardened 62-64 HRC
annealed 25-30 HRC
TYPICAL APPLICATIONS
For repair and manufacture of cold and hot cutting tools, trimming dies, broaches, punching tools, drills, milling tools, hot dies, etc.
LH 717
Corrosion and oxidation resistant for surfacing & joining
TECHNICAL DATA
UTS: 70-75 kgf/mm2
Elongation: 25-30%
Hardness as welded: 20-24 HRC
work hardened: 42-48 HRC
Metal recovery: 150%
TYPICAL APPLICATIONS
Fabrication and repair of hot pressing tools as well as surfacing of parts subject to abrasion, oxidation and corrosion. Drop forge dies, hot trimming tools, pump impellers, valves. Ideal for crack-free welding of parts subject to thermal and chemical influence, i.e., for joining of heating elements.
LH 718
Electrode for abrasive and corrosive conditions at elevated temperatures
TECHNICAL DATA
Hardness: 48-50 HRC & at 500O C 30-35 HRC
TYPICAL APPLICATIONS
For surfacing of blast furnace bells and hopper, tong pins, hot shears, etc. to resist severe abrasion specially at elevated temperatures.
LH 720
Surfacing electrode with chromium carbide for abrasion resistance
TECHNICAL DATA
Hardness: 58-62 HRC
TYPICAL APPLICATIONS
Wear resistant surfacing of mild and low alloy steels: Building up machine parts, digger teeth, bucket teeth & edges, conveyer screws, mixer wings, oil expeller worms, scrapper blades, cement die rings, muller tyres, plough shears & mining applications.
LH 721
Alloy containing tungsten carbides
TECHNICAL DATA
Hardness on WC matrix: 70-75 HRC
Hardness on weld deposit 60-62 HRC
TYPICAL APPLICATIONS
Surfacing of parts subject to heavy abrasion and erosion. Oil drilling stabilizers, earth moving equipment, cutting hard rocks, etc. Ideal for coal, coke and slag processing plants, wing bits, shovel teeth, oil drill tools, blades, mixers, etc. Excellent for surfacing of parts used in mines containing high silica deposits.
LH 725
Surfacing electrode with chromium carbide deposits
TECHNICAL DATA
Hardness: 60-65 HRC
TYPICAL APPLICATIONS
Ideal for agitator blades, scrapper blades, conveyor screws, clay extruder screws. Coal crusher rolls in thermal power plants, oil expeller worms, tooth points and buckets of excavators, digger teeth, bucket tip edges, cement die rings, muller tyres, plough shears, crusher hammers in cement plant, Chinese long walls in underground mines. For components subject to metal to metal wear and abrasion with mild impact likely to be absorbed elastically. Surfacing of mild and low alloy steels for wear resistant properties.
LH 726 B
Special cobalt-based alloy for surfacing plain carbon and alloy steels
TECHNICAL DATA
Hardness: 35-40 HRC
TYPICAL APPLICATIONS
Surfacing of work-pieces requiring high corrosion, oxidation, heat and impact resistance. Surfacing of valves, conveyer screws, knives, hot-shearing blades, dies, cutting edges, e.g., in chemical, rubber, oil and sugar industries as well as in steel mills.
LH 738 S
Spray type, extra high, wear-resistant electrode having complex carbides with globular deposition
TECHNICAL DATA
Hardness:57-61 HRC
TYPICAL APPLICATIONS
Primarily for “Spot-Arc” building / roughening the chilled cast iron rolls in the sugar mills. Also for reclamation of sand mixing blades, scrapers, screw flights, mixing paddles, etc.
LH 743 N
Electrode with high chromium carbide deposit for excellent resistance to abrasion and heat
TECHNICAL DATA
Hardness:55-60 HRC
TYPICAL APPLICATIONS
Hard surfacing of parts which are subject to severe abrasive wear and moderate shocks. Conveyer screw flights, mixer blades, auger screws, dredging cutter, runner bottom edge, pug mill, blast furnace bells & hoppers.
LH 743 S
Hard surfacing electrode with very high metal recovery for excellent resistance against abrasion
TECHNICAL DATA
Hardness: 57-61 HRC
Metal recovery: 180%
TYPICAL APPLICATIONS
For hard facing of parts subject to heavy abrasion and metal to- metal wear with mild impact and temperature up to 650ºC. Suitable for: refractory press screws, palm oil expeller flights, conveyor screws, impellers, dredging cutter & drag head, runner bottom edge, pug mill, knife, wing knife, auger, boring bits, blast furnace bells and hoppers, clinker crusher hammers and rotors.
LH 745 S
Surfacing electrode with exceptional hardness and abrasion resistance
TECHNICAL DATA
Hardness: 57-63 HRC
Hardness at 600ºC: 40-43 HRC
Metal recovery: 190-210%
TYPICAL APPLICATIONS
For surfacing of hopper and protection plates in quarries, ore crushing rolls, gyratory crusher mantles, ore breaker teeth, scraping beaks, sinter plant disintegrators, blast furnace bells and hoppers, chutes, sinter breaker stars and grizzly bars etc.
LH 7141
High deposition efficiency manganese steel electrode specially designed for surfacing rail crossings
TECHNICAL DATA
UTS: 75-80 kgf/mm2
Hardness as welded: 15 HRC
work hardened 42-55: HRC
TYPICAL APPLICATIONS
For welding of 13% Mn steel rail crossing where minimum 15 GMT life of the rail crossing is required. For welding bullet proof arm our quality steel plate. For welding hard or unidentified steels. For heavy, crack free buildups. The electrode can be used for dissimilar joints consisting of high manganese and other steels.
LH 7191
High tensile, tough, austenitic manganese steel alloy
TECHNICAL DATA
UTS: 75-82 kgf/mm2
Elongation: 30-35%
Hardness as welded: 17 HRC
work hardened: 55 HRC
TYPICAL APPLICATIONS
For surfacing Mn Steel, rail points and crossings, frogs, switches, etc., where minimum 25 GMT is required. Rebuilding 14% Mn steel components (earth moving equipment). For welding of bullet proof armour steel, joining dissimilar steels such as high Mn steel and carbon steel. Ideal alloy for surfacing castings of hadfield steel.
LH 7450
Electrode with extreme resistance to abrasion at high temperatures
TECHNICAL DATA
Hardness: 62-66 HRC at ambient temp
Hardness: 40 HRC at 630ºC
Metal recovery 230%
TYPICAL APPLICATIONS
Sinter-handling equipment, blast-furnace bells and hoppers, clinker conveyor chains, cokepusher shoes, excavator buckets, gyratory crusher mantles, etc.
LH 7461
Highly abrasion-resistant, hard-surfacing electrode with very high metal recovery
TECHNICAL DATA
Hardness: 55-62 HRC
TYPICAL APPLICATIONS
LH 7461 Hardfacing electrode is specially designed for applications where welds have to withstand heavy abrasion in service and metal-to-metal wear. For surfacing of ore-crushing rolls, gyratory crusher mantles, ore-breaker teeth, scraping beaks, sinter plants, disintegrators, etc.
