3.01
171
1. Machine preparation Align the spindle in a lathe and turn a suitably wide and
deep groove in the hardened face to remove all stellite down to clean, pure base material
Make room for at least two layers of weld metal.
2. Weld preparation Welding should as far as possible be carried
out in the horizontal position. A suitable jig should be prepared, holding the spindle in a tilted position allowing it to be rotated.
3. Preheating Preheat the valve head evenly to 50–00 °C and
maintain during welding. Preheating tempera- ture depending on type of alloy in valve.
4. Welding Electrodes should be dried at 50 °C for 1 hour
prior to use. The Unitor miniheater electrode quiver may be used for this. Keep the arc short
and hold the electrode as near as possible to 90°C to the work piece.
Welding with IMPACT-39 S does not require any other electrode. In order to minimise heat effects, the welding should be done in stages. Place the first
bead towards the outer side of the groove, and do about one third of the circumference.
Then start at the oppsosite side and do the second bead so it finishes where the first one
started. Finally do the third, starting where the first one finished. For large diameter spin-
dles the bead should be done in four parts.
Grind the starting and stopping point of each bead. Also grind the bead itself to remove
possible slag and spatter, in order to obtain a smooth transition between beads. Control the temperature adjacent to the welding zones and do not start the next
bead until the base metal has regained the correct temperature.
5. Cooling When the top layer is completed, the spindle
should be immersed in insulating material or dry sand in order to ensure slow cooling.
6. Final machining After cooling, machine to correct tolerances, use
toolbit quality H1 or K10 with negative 4° cutting angle, low turning speed and fine feeding.
Suggested jig for holding spindles.
Large diameters Small diameters
Welding bead sequence
Ensure slow cooling. Put the first bead towards the
outer side of the groove Second layer
or top layer First layer or
buffer layer Note: Each layer
can consist of several beads
3.01
17
Electrode for Joining Wear Resistant Overlays
Identification:
Classifications
Approvals Type of current
Welding positions
Materials to be welded
All weld metal composition Typical mech. properties
of weld metal
Packaging data Welding data
AC DC+
PA PB
PC PF
.5mm only PE, PD
Repair of: Worn winch wheels and anchor windlass wheels on anchoring systems. Cargo
handling equipment and dredger equipment, T1-steel, N-A-xtra steel, OxAR steel, Fine grain steel, Cr Mo steel, Manganese steel, Shear blades.
Trawler equipment subject to metal to earth wear and metal to metal wear. Suitable for both joining and making wear resistant overlays.
N.A.
Imprint
Unitor WEARMAx-37
AWS A5.4 ~ E 307-6
Fe Cr
Ni Mo
Mn Si
Rest 16–0
7–10 1.3–.3
5–7 1 Max
Diameter Length
Electrodes Net weight
Product No. Boxes
mm. mm.
per box per box
per box per carton
.5 350
49 1.6
095-606454 6
3. 350
68 3.5
095-606455 3
4 350
4 3.4
095-606456 3
Re-drying temperature: 50 °C 48 °F for one hour.
Tensile Yield
Elengation Hardness as
Hardness Recovery
strength strength
welded HB after work
MPa MPa
hardening HB
650-700 480-530
30–40 190
415 150
Diameter Current
Arc time Deposition rate Electrodes per
Fume class mm.
range, A electrode, sec.
Kgh kg weld metal
Danish Std.
.5 75–140
80 0.9
48 6
3. 90–170
103 1.
31 6
4 10–40
105 1.8
1 7
MSDS available on request.
3.01
173
Unitor WEARMAx-37 is an electrode which produces a stainless deposit
with excellent resistance against wear. The initial weld deposit is com-
paratively soft with high elongation. When subjected to grinding, machin-
ing or wear, the surface will harden to more than 400 HB providing a
smooth hard and crack resistant layer with low coefficient of friction. This
produces a surface, which despite being tough, does not cause wear
on matching parts, like chain wires etc. The electrode is also designed
to achieve high tensile strength and yield properties, making it an excel-
lent electrode for joining dissimilar metals.
Areas of application: Anchor winch wheels and guides,
windlasses drums and rollers, cranes and track wheels, sprocket wheels.
Also used for joining Cr Mo steel, T1-steel, Manganese steel, N-A-xtra
steel, OxAR steel, HARDOx 400, fine grain steel and shear blades.
Special publication ID.No. 11051
WEARMAX 327 Available
Winch wheel
Chain
3.01
174
Electrode for Wear Resistant Overlays
Identification:
Classifications
Approvals Type of current
Welding positions Materials
to be welded All weld metal composition
Typical mech. properties of weld metal
Packaging data Welding data
AC DC+
PA PB
PC Hardsurfacing of:
Austenitic manganese steel with 1–14 Mn Harden able or self harden able steel
N.A.
Imprint
Unitor ABRATECH-330
DIN 8555 E 10-UM-60-G
Fe Cr
Mn Si
C
Rest 31
0. 1.3
3.5
Diameter Length
Electrodes Net weight
Product No. Boxes
mm. mm.
per box per box
per box per carton
3. 350
68 3.5
095-7575 3
4.0 350
4 3.4
095-7583 3
Re-drying temperature: 50 °C 48 °F for two hours.
Hardness Recovery
HRC 57-6
170
Diameter Current
Arc time Deposition rate Electrodes per
Fume class mm.
range, A electrode, sec.
Kgh kg weld metal
Danish Std.
3, 100-150
95 1.34
8.3 6
4,0 130-180
98 1.91
19.1 6
MSDS available on request.
3.01
175
General Information Unitor Abratech-330 is a hard sur-
facing electrode with excellent resistance to abrasive wear under
moderate impact and pressure. The electrode deposit carbides in an aus-
tenitic matrix.
Edge preparation: Left over of previ- ous welds should be removed using
the gouging electrode CH-- 38 Pre-heating: Depends on steels car-
bon equivalent Ce and the shape and size of part to be welded. We
recommend as follows:
Ce 0, No need for pre-heating
Ce 0,-0,4 Pre-heat to 100–00°C Ce 0,4-0,8 Pre-heat to 00–300°C
Austenitic Manganese steel must not be pre-heated. The interpass temper-
ature of object not to exceed 50°C. When welding Austenitic Manganese
steel with 1–14 Mn it is an advan- tage to make a buffer layer with
Wearmax-37.
When welding on harden able or self harden able steels it is an advantage
to make a buffer layer with Tensile- 38 N.
Weld using DC+ polarity and keep electrode angle close to 90°and with
a short arc. A small weaving motion from side to side might be employed.
Normally the required hardness is obtained in one layer.
Alternative welding: Alternative A
Large massive work pieces Ø 3, mm = 130–150 A
Ø 4,0 mm = 150–180 A Alternative B
Smaller items with less volume and where interpass temperature is criti-
cal Ø 3, mm = 100–10 A
Ø 4,0 mm = 130–140 A The electrode should be re-dried to
50° C for two hours before use
Remove old welds using gouging
electrode CH-2-382
Max interpass temperature when welding Austenitic
manganese steel should be 250 °C
Buffer layer on Austenitic manganese steel is done using Wearmax-327
← Abratech-330 ← Wearmax-327
← Abratech-330 ← Tensile-328N
Buffer layer on harden able or self harden able steels is done using Tensile-328 N
The effect of dilution with base material is decreased when the welding seams are placed as above
Max 250 °C
3.01
176
Electrode for Stainless Steel
Identification:
Classifications Approvals
Type of current Welding positions
Materials to be welded
All weld metal composition Typical mech. properties
of weld metal
Packaging data Welding data
Imprint
Unitor 188-31 N 316L-17
SFAAWS A5.4 EN 1600
E 316L-17 E 19 1 3 LR 1
DNV GL
LR BV
ABS 316L
4571 316L
316L E 316L 17
Diameter Length
Electrodes Net weight
Product No. Boxes
mm. mm.
per box per box
per box per carton
1.6 300
13 1.6
095-699397 6
.5 300
89 1.7
095-699405 6
3. 350
54 1.7
095-699413 6
Re-drying temperature: 350 °C 66 °F for two hours.
Diameter Current
Arc time Deposition rate Electrodes per Fume class
mm. range, A
electrode, sec. Kgh
kg weld metal Danish Std.
1.6 30–45
6 0.6
30 3
.5 45–90
35 1.1
97 4
3. 60–135
46 1.4
56 4
MSDS available on request. 90 of max. amperage
Tensile strength Yield strength
Elongation Impact value
MPa MPa
ISO-V J
570 460
40 At +0°C = 60
At –0°C = 55
C Mn
Si Cr
Ni Mo
FN
max. 0.030 0.5 - 1.
max. 0.9 17.0 - 19.0
11.0 - 13.0 .5 - 3.0
3–10
AC DC+
PA PB
PC PF
PE, PD
Steel grades BS 970 DIN 1744017445
W.Nr. AFNOR NF A35-
ASTMACI SIS
UNS 1554
573574576582 A240, A312, A351
Extra low 316S11
xCrNiMo1713 1.4404 ZCND17.1
TP 316L 353
S31603 carbon
CF-3M J9800
C0.03 316S13
xCrNiMo18143 1.4435
xCrNiMoN171 1.4406 ZCND17.1 á l’N TP 316LN
S31653 xCrNiMoN17133
1.449 ZCND17.13 á l’N Medium
316S31 x5CrNiMo171
1.4401 Z6CND17.11 316 TP 316
347 S31600
carbon 316S33
x5CrNiMo17133 1.4436 Z6CND17.1
343 S30409
C0.03 316S33
G-x6CrNiMo181 1.4437 Z6CND17.1
C P F-8M J9900
316S33 G-x10CrNiMo189
1.4410 316S33
G-x6CrNiMo1810 1.4408 Z6CND17.1
C P F-8M J9900
Ti-Nb 30S31
G-x6CrNiMoTi171 1.4571 Z6CNDT17.1 316Ti
344 S3100
stabilized S31635
347S31 Z6CNNb17.1
TP 347 338
S34700S34709 347S31
x6CrNiNb1810 1.4550 Z6CNNb17.1
TP 347 338
S34700S34709 347S31
G-x5CrNiNb189 1.455 Z6CNNb18.10
CF-8C, CPF-8C J9710
LMA
Electrode
3.01
177
Unitor 188-31 N is a rutile basic type electrode for welding stainless and
acid resistant steel containing 16–18 chromium, 10–14 nickel and –3
molybdenum.
It is suitable for all welding positions. When welding tanks containing cor-
rosive elements, it must be remem- bered that the final bead must be laid
on the side exposed to corrosion, to prevent intercrystalline corrosion. The
electrode will operate on AC or DC polarity. It is always preferable to use
DC positive when welding stainless or acid-resistant steel.
Use a brush with stainless steel wire bristles when cleaning up the weld.
If an ordinary wire brush is used, iron oxides will be deposited in scratches
left by the brush, as this can lead to corrosion. The dark oxide deposit
formed on either side of the bead should also be removed. Best result
is obtained using Unitor Pickling Gel to remove discolouration and oxides
after welding. For welding stainless acid-resitant steel to low alloy steel,
use Unitor electrode 314-3 N.
Welding: 1. Use a short arc. A long arc will
increase arc tension, resulting in lower current output and poor
fusion.
2. The electrode should be held