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Supercored 70B
FLUX CORED WIRE
AWS A5.20 / ASME SFA5.20 E71T-5MJ
JIS Z3313 YFW-A502B
l Applications
Mild and 490N/mm2 high tensile strength steels for shipbuilding, machinery structures, bridges, and heavy plant facilities.
l Characteristics on Usage
Supercored 70B is a basic type flux cored wire with excellent characteristics and is suitable for steel with a tensile strength up to 600N/mm2.
Deposited metal shows superior crack resistance, excellent toughness at low temperature of -20~-50°C(-4~-58℉).
l Notes on Usage
a) Proper preheating(50~150°C)(122~302℉) and interpass temperature must be used in order to release hydrogen which may cause cracking in weld metal when electrodes are used for medium and heavy plates.
b) Use Ar+20~25% CO2 gas for welding.
c) Refer to page 168 for storage instructions.
l Welding Position (Flat, Horizontal fillet and Vertical-up)
Current Shielding Gas
DC± Ar+20~25% CO2
l Typical Chemical Composition of All-Weld Metal (%)
|
C |
Si |
Mn |
P |
S |
|
0.06 |
0.43 |
1.33 |
0.011 |
0.013 |
l Typical Mechanical Properties of All-Weld Metal(Ar 75%+25% CO2)
|
Y.S N/mm2 (lbs/in2) |
T.S N/mm2 (lbs/in2) |
EL. (%) |
Temp. ℃(℉) |
CVN-Impact Value J (ft·lbs) |
|
450 (45,300) |
520(75,400) |
32 |
-40 (-40) |
78 (58) |
l Approval
DNV, BV, GL, LR
l Packing (Including Ball Pac)
|
Dia.(mm) (in) |
1.0 |
1.2 |
1.4 |
1.6 |
2.0 |
Spool(kg) |
12.5 |
15 |
20 |
|
0.039 |
0.045 |
0.052 |
1/16 |
5/64 |
(lbs) |
28 |
33 |
44 |
|
|
Ball Pac |
|
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l Sizes Available and Recommended Currents (Amp.)
|
Size mm (in) |
1.0 (0.039) |
1.2 (0.045) |
1.4(0.052) |
2.0(5/64) |
|
F&HF |
150~280 |
170~320 |
200~350 |
200~400 |
|
V-up, OH |
70~130 |
80~150 |
90~180 |
|
