WEAR FACING
ALLOYS
AF 700 F
(oxy-acetylene)
Violet - flexible coated brazing
rod
Surfacing of steel,
cast iron, bronze, gear teeth, shafts, cams, bearings, valve seats, pistons,
slide bars, metal seals
Special
Characteristics:
|
 |
High frictional wear and
corrosion resistance |
|
|
Work hardening, tough and
easily machinable |
Hardness
: 10 -15 RC
Size (mm) :
3.15
E 708
Fabrication or repair of hot work tools of
carbon steel or low alloy steels, dies, stampers for non-ferrous
metals
Special Characteristics :
|
|
Tough, wear resistant hot
work steel deposit containing tungsten
|
|
|
Free from cracks,
porosity |
|
|
Smooth and uniform weld
beads |
Hardness
: as welded 41 46 RC
After Hardening
: 49 51 RC
After annealing
: 21 24 RC
Sizes
(mm) :
3.15 4.00
Current
(Amps) : 90-110 140-160
E
710
Tractor sprockets, rollers, concrete mixer
blades, carbon steel rails, dies, stampers
Special Characteristics :
|
|
Resistant to
impact
|
|
|
hick build-ups
possible |
|
|
Deposit can be
machined |
Hardness
: 29-35 RC
Sizes(mm) :
3.15
4.00 5.00
Current(Amps)
: 80-110 110-160
140-180
E
711
Digger teeth, drills, conveyor screws,
cutting and forming tools, shear blades, crusher hammers, crane wheels, conveyor
buckets, conveyor parts, plough-shares, cultivators, pulverisers, skids, mixers,
oil expeller worms
Special Characteristics :
|
|
Basic electrode with
excellent welding characteristics |
|
|
Economical for making hard
overlays in all positions |
|
|
The deposit is hard, tough
and free from porosities |
Hardness
: 56-58 RC
Sizes(mm) :
3.15
4.00 5.00
Current(Amps) :
80-130 90-180 140-230
E
713
Manganese steel parts, crushing hammers,
jaws, mantles, excavator teeth, manganese rails
Special Characteristics :
|
|
Work hardening
type |
|
|
Excellent abrasion
resistance in work hardened condition |
|
|
Resistant to cracking and
deformation |
Hardness - As
welded : 10-17 RC
After work hardening
: 40-45 RC
Sizes
(mm) :
3.15
4.00 5.00
Current (Amps) :
70-120 130-190 170-250
E 714
S
For welding work hardening and difficult to
weld manganese steel parts, crushing hammers, jaws, mantles, excavator teeth,
railway points and crossings
Special Characteristics :
|
|
Extremely ductile weld
metal |
|
|
Ideal for abrasion and
impact |
Elongation
: 30-33%
Metal
recovery
: 140%
Hardness - as welded : 17-20 RC
After work hardening : 42 -
50 RC
Sizes (mm) :
3.15
4.00 5.00
Current (Amps)
: 100-140 150-190 180-220
E
715
Cutting tools and knives, broaches, drills,
punching tools, hot dies, milling tools
Special Characteristics :
|
|
Tough, hard, wear and
oxidation resistant |
|
|
Special high speed steel
type deposit |
Hardness
: As
welded
: 59 - 61 RC.
After Heat treatment : 62 - 64 RC
After
annealing
: 25-30 RC
Size (mm) :
3.15 4.00
Current (Amps)
: 90-110 110-130
A
717
Drop forge dies, hot trimming dies, pump
impellers, valves, hot shear blades, heating elements
Special Characteristics :
|
|
Corrosion and oxidation
resistant |
|
|
Resistant to deformation
from static or cyclic loads at high
temperatures |
Metal
recovery
: 50%
Hardness - as welded : 20
-24 RC
After work hardening : 42 - 48 RC
UTS of
joints
: 70 - 75 kgf /mm2
Elongation
: 25 - 30%
Sizes
(mm) :
2.50
3.15
4.00 5.00
Current (Amps)
: 90-130 120-160 150-190
190-230
E
718
Surfacing of blast furnace bells and
hoppers, tong pins, hot shears, electrode for abrasive and corrosive conditions
even at elevated temperatures
Special Characteristics :
|
|
Deposit retains hardness at
relatively elevated temperatures due to secondary
hardening. |
|
|
Crack-free, heavy build-up
possible |
|
|
Special alloy makes the
weld resistant to impact |
Hardness at room
temperature : 48 - 50 RC
Hardness at
5000C
: 30 - 35 RC
Sizes
(mm) :
3.15
4.00
5.00
Current (Amps) : 90-110
110-140 140-180
E
720
Digger teeth, bucket edges, conveyor
screws, mixing wings, oil expeller worms
Special Characteristics :
|
|
Hard wear
resistant |
|
|
"Chromium Carbide" is
distributed uniformly in the weld
matrix |
Hardness of weld
deposit : 58-62 RC
Sizes
(mm) :
3.15
4.00 5.00
Current (Amps)
: 90-110 110-140 140-180
A 726 B (GTAW
oxy-acetylene)
E 726 B DC
(+)
Wear-facing for high temperature
applications, slides, valves, conveyor screws, knives, tongs, hot shear blades,
dies etc.
Special Characteristics :
|
|
Cobalt based alloy
(Stellite) to retain hardness even at high
temperatures |
|
|
High resistance to
corrosion, oxidation, heat and
wear |
Hardness :
35-40 RC
Sizes (mm) :
3.15
4.00 5.00
Current (Amps)
: 110-120 140-160 180-220
A
728
|
Surfacing of tools in mining and petroleum industry, milling,
cutting, deep boring chisels, hard facing of tools mining and petroleum
industry, drill bits.
Coarse Tungsten
carbide particles embedded in German Silver alloy. Tough and
wear-resistance hardfacing alloys for hardfacing of
tools. |
|
Special
Characteristics :
|
|
Tough and wear resistance
weld deposit is useful for cutting action. |
|
|
Tungsten carbide particles
in weld metal are hard, brittle and will not melt even in oxy- acetylene
flame. |
|
|
Weld deposit is non
machinable and not recommended for
friction. |
Working
Temperature : 850 0C - 910
0C
Hardness -
TC
: 68-71 RC
Particle
sizes
: + 1.5 - 3.2 mm
of
Tungsten
+ 3.2 - 5.0 mm
Carbide
+ 5.0 - 6.0 mm
E 738
S
Roughening of chilled cast iron crushing
rolls in sugar mills, Spray type, extra-high wear-resistant electrode having
complex carbides. Ideally suited for reconditioning of sugar
rolls
Special Characteristics :
|
|
Resistant to heavy
loads. |
|
|
Smooth and stable arc even
in positional welding. |
|
|
Faster build-up due to high
deposition rate. |
|
|
Excellent deposition with
an aggressive 'Spray type' arc permits its use even while the rolls are in
use. |
|
|
Imparts better grip to cane
being crushed |
Hardness
: 59-61 RC
Sizes
(mm) :
4.0
5.00
Current (Amps)
: 120 -160 160-200
E 743
S
Refractory press screws, brick press
screws, cement and groundnut press screws, impellers, dredging bucket, pug mill
knife, crushers for minerals and wear pads, boring bits, conveyor
screws
Special Characteristics :
|
|
Very high metal recovery of
180% |
|
|
Exceptional abrasion
resistance even at elevated
temperatures |
Hardness on second
layer : 57-61 RC
Sizes
(mm) :
3.15
4.00
5.00
Current (Amps) : 120-155
140-200 160-210
E 745
S
On crusher rolls, scrapping beaks, blast
furnace bells and hoppers
Special Characteristics :
|
|
Hard surfacing electrode
with excellent abrasion resistance at high temperature and exceptional
metal recovery (210%) |
Hardness at
RT : 57 - 63 RC
Hardness at
6000c : 40 - 43 RC
Deposition
rate : 190 - 210%
Sizes
(mm) :
3.15
4.00 5.00
Current (Amps)
: 125-160 160-200 220-300
Also available in
this group:
E
717B : Surfacing electrode with Hastelloy-B type
deposit
A
721 : (Oxy-acetylene)
E
721DC(+) : Alloys containing tungsten carbide for oil drill tools and
earth moving equipment
E
726 A : Cobalt based hard surfacing electrode ( Stellite -
I)
E
726 C : Cobalt- Chromium- Tungsten hard alloy electrode for Stellite -
12
E
7071 : High deposition offering electrode and fully austenitic but crack
resistant
E
7140 : Work hardens rapidly in service
E
7141 : Extremely high resistant to impact and pressure, approved by RDSO
in H3 class
E
7191 : For excellent resistance against impact & pressure, approved
by RDSO in H3A class
E
7251 : Abrasion resistant with Chromium Carbide
E
7430 : For excellent abrasion resistance
E
7450 : Extremely resistant to abrasion at room and high
temperature
E
7461 : Highly abrasion resistant, hard surfacing with very high metal
recovery.
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