Brand
Name Classification |
Description |
Typical
Weld Metal Properties |
Welding
parameters |
Applications |
Chemical
Composition (%) |
Mechanical
Properties |
Ratna
7018 (Spl) AWS:A:5.5:E 6012
IS:814:EB 5626H3 JX |
An
iron powder, hydrogen controlled electrode producing tough and ductile
weld metal for welding heavy and rigid structures subjected to dynamic
loading. The weld metals of radiographic quality and displays remarkable
mechanical properties like toughness resistance even at -50c
temperature |
C
0.060
Mn
1.400
Si
0.420
S
0.018
P
0.019 |
U.T.S.-550N/mm2
Y.S
-480N/mm2
EL
-28.00% (L=4d)
CVN
impact at -46°C 56 J |
DC
(+)
Dia
Amps
(mm)
2.50
70-100
3.15
100-140
4.00
140-190
5.00
200-250
|
Suitable
for high pressure boilers/ vessels, carbon steel, rigid and heavy
structures, steel sensitive to hydrogen embrittlement and prone
to crack, industrial equipments subjected to severe impact. |
Ratna
7018M AWS:A:5.5:E 7018
IS:1395:E 49BA 126 Fe |
An
iron powder, hydrogen controlled, medium heavy coated electrode
producing 0.50 % Mo weld deposit. Electrode has high welding effeciency
coupled with creep resistance properties at 525°C temperature
and has excellent mechanical properties. |
C
0.070
Mn
0.850
Si
0.440
M0
0.550
|
U.T.S.-540N/mm2
Y.S
-460N/mm2
EL
-28.00% (L=4d)
CVN
impact at +27°C 52 J
|
DC
(+)
Dia
Amps
(mm)
2.50
70-100
3.15
100-140
4.00
140-190
5.00
200-250
|
Suitable
for high pressure boiler tubes and plates, pipeline fabrication,
for welding 0.50% Mo and 1% Cr-5% Mo steels used for elevated temperature
services upto 525°C. Also suitable for fine grained and creep
resistant steel welding. |
Creep
Strength at 525°C 80N/mm2 ( 1% off set after 10000
Hrs) |
Ratna
8018 Ni (Spl) AWS:A:5.5:E 8018BG IS:1395:E 49BA126 Fe |
A
basic coated, hydrogen controlled, iron powder electrode depositing
0.65% Ni weld metal with exotic finish and radiographic joints.
Gives low spatter, smooth arc, also works well to resist atmospheric
corrosion. |
C
0.075
Mn
1.540
Si
0.350
Ni 0.700
|
U.T.S.-575N/mm2
Y.S
-510N/mm2
EL
-29.00% (L=4d)
CVN
impact at 60°C 56 J
|
DC
(+)
Dia
Amps
(mm)
2.50
80-100
3.15
110-140
4.00
160-190
5.00
200-250
5.00
190-230
|
Suitable
for welding on Quenched & Tempered steels, pressure vessels,
storage tanks, penstocks, fine grained steels, industrial equipments
subjected to sub zero temperature, other steels categorised for
high strength. |
Ratna
7018 Ni (Spl) AWS:A:5.5:E 7018G IS:1395:E 49BG126 Fe |
An
iron powder, hydrogen controlled electrode suitable to resist high
impact at sub zer0 temperature down to 50°C, for superior finish
and superb mechancial properties. |
C
0.070
Mn
1.050
Si
0.350
Ni 0.550
|
U.T.S.-535N/mm2
Y.S
-450N/mm2
EL
-28.50% (L=4d)
CVN
impact at 50°C 50 J
|
DC
(+)
Dia
Amps
(mm)
2.50
80-100
3.15
110-140
4.00
160-190
5.00
200-250
|
Suitable
for restrained joints, heavy steel sections subjected to dynamic
loading, for welding medium and high tensile steels, fine grained
steels, ammonia storage tanks, heat treated steels etc. |
Ratna
8018 C1 AWS:A:5.5:E 8018 C1 IS:1395:E 55BC126 Fe |
A
medium heavy coated, hydrogen control, iron powder type electrode
for welding Ni steels with 2.25% Ni. Electrode has excellent finish
and mechancial properties and toughness at sub zero temperature
down upto 60°C, resists hydrogen embritlement effect. Weld deposit
is of radiographic quality. |
C
0.080
Mn
0.950
Si
0.450
Ni 2.550
|
U.T.S.-610N/mm2
Y.S
-520N/mm2
EL
-29.00% (L=4d)
CVN
impact at 60°C 68 J
|
DC
(+)
Dia
Amps
(mm)
2.50
70-100
3.15
100-130
4.00
150-190
5.00
190-250
|
Suitable
for fabrication of LNG storage tanks, Liquified ases, cryogenic
vessels, to weld 2.25% Ni steels, oil refinery valves, pressure
vessels, construction of components to be subjected to low temperature
service in petrochemical industries. |
Ratna
8018 C2 AWS:A:5.5:E 8018 C2 IS:1395:E 55BC126 Fe |
A
medium heavy coated, hydrogen controlled, iron powder type electrode
for welding Ni steels with 3.oo - 3.25% Ni. Electrode gives smooth
arc, excellent finish, mechanical properties and toughness at temperature
at -75°C, resists 2 cracking due to hydrogen embritlement. Welds
are radiographic quality. |
C
0.070
Mn
0.960
Si
0.440
Ni 3.550
|
U.T.S.-600N/mm2
Y.S
-510N/mm2
EL
-28.0% (L=4d)
CVN
impact at 75°C 62 J
|
DC
(+)
Dia
Amps
(mm)
2.50
70-100
3.15
100-130
4.00
150-190
5.00
190-250
|
Suitable
for fabrication of LNG storage tanks, liquified gases,cryogenic
vessels, to weld 3-3.50% Ni steels, oil refinery valves, piping
works, pressure vessels, construction of components to be subjected
to low temperature service in petrochemical industries. |