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Electrodes For Hardsurfacing Applications

HARDFACE-300 R

An electrode for hardfacing applications

Codification
IS - 7303 - 74 : E Fe B 314
Characteristics & Applications :

HARDFACE -300 R is Rutile based heavy coated electrode designed for hardfacing jobs of machine components. Weldmetal is highly resistant to abrasive wear with moderate impact. The deposit is air hardening type and is very useful for Hardfacing applications on Mild and low alloy steel where a hardness of 30-40 RC is required. Deposit of Hardface-300 R can be machined with carbide tools. For better results 2 layers are recommended. Typical uses include shear blades, punching dies, rail ends and crossings, couplings, conveyor parts, sprockets, Idle wheels, pulleys,shafts, axles etc.

Chemical-Mechanical Properties (Typical)
Hardness of 2 Layered deposit on Mild Steel
30-40-RC
Current Requirments : AC/DC
Welding Instructions :

Excessive weaving should be avoided and arc length should be kept as low as possible. Electrodes should be dry. Moist electrodes to be redried at 120oC for one hour before use.

HARDFACE-600 LH

A low hydrogen air hardening type hardfacing electrode for maximum service life.

CODIFICATION :-
IS - 7303 - 74 : E Fe 1 C 314
Characteristics & Applications :

HARDFACE -600 LH is a basic coated electrode depositing air hardening weld metal which has excellent resistance to abrasion or impact or both together in worn out machine parts to obtain maximum service life. Deposited hardness on M. S. ranges from 48-52 RC on a single layer to 55-60 RC on two layers & hence it is non machinable. Being a low hydrogen electrode, the deposits are sound & free from porosity. Excessively worn out parts can also be reclamed by using Hardface-600 LH and buffer layers can also be layed with it. Some of the applications are Tractor Idlers & Grousers, shovel lips, drive shaft bushing & bearing, cultivator shovels, muller plough, Bamboo Chipper Knives, Cane Cutting Knives, etc.

Chemical-Mechanical Properties (Typical)
Current Requirments : AC/DC
Welding Instructions :-

Do not use high current. Electrodes should be dry. Moist electrodes to be redried at 125oC. for one hour before use. Deposit Short & Stringer beeds.

HARDFACE - MN

Electrode for resurfacing of austentic manganese steel.

CODIFICATION :-
IS - 7303 - 74 : E Fe Mn A
Characteristics & Applications :

HARDFACE - Mn is a basic coated AC/DC electrode depositing an austenitic manganese steel weld metal. The Deposits of Hardface - Mn have excellent resistance of wear due to abrasion & high impact. Because of high Manganese recovery in weld beed. It is ideally suited for resurfacing of wornout austenitic manganese steel parts containihg 12-14% Manganese. When Hardface -Mn is to be used on plain carbon steel or low alloy steels, a buffer layer of stainless steel electrodes (such as Chronicord18-8-5 ) should be applied & then Hardface - Mn should be used for subsquent layers. Prime uses are in Crusher Jaws, Dragline Bucket teeth, Ball mills, Railway Crossings, Cement Grinder rings, Muller tyres etc.

Chemical-Mechanical Properties (Typical)
Current Requirments : AC/DC (+)
Welding Instructions :-

The Parent material should be free from all sorts of contamination, such as rust, dust, grease/oil or any foreign matters. Do not allow the job to be over heated. Use minimum possible current and remove the work hardened zone by grinding, if any.

HARDFACE-60 RC

Unique electrode for air hardening type hard facing applications.

Characteristics & Applications :

HARDFACE -60 RC produces a very hard & sound weld deposit which has excellent resistance to abrasion combined with moderate impact. Two layered hardness on mild steel is between 50-60 RC ( 500-600 BHN) & hence machining is not possible. Jobs can only be grinded. Weld beed is free from porosity & running characteristics are pleasing. Arc is very stable and deslagging is easy. Hardface 60 RC is Suitable to lay hardface layers on worn out parts for enhancing its service life. Some typical applications can be termed as excavator teeth, muller ploughs, oil expeller worms, plough shares, crushing hammers, crane wheels, scraper blades etc.

Chemical-Mechanical Properties (ypical)
Current Requirments : AC/DC