- Applications
- WT-81 is designed for welding of 590MPa high tensile steel with slow freezing slag system. Typical applications include machinery, shipbuilding, offshore structures, bridges and general fabrications.
- Characteristics on Usage
-
- - WT-81 is a rutile type flux cored wire for all-position welding.
- - It provides smooth arc, low spatter levels, good weldability and good bead appearance.
- Notes on Usage
-
- - Proper preheating(50~150°C) and interpass temperature must be used in order to release diffusible hydrogen which may cause cracking in weld metal when electrodes are used for medium and heavy plates.
- - One-side welding defects such as hot cracking may occur with wrong welding parameter such as high welding speed.
- - Gas flow rate is proper 20~25ℓ/min.
- - Shielding gas should be used 100% CO2.
- Sizes Available and Recommended Currents ( DC + )
-
Sizes Available and Recommended Currents ( DC + )
Dia(mmØ) |
1.2 |
1.4 |
1.6 |
Position |
F |
Amp |
180~340A |
200~360A |
200~420A |
HF |
180~340A |
200~360A |
200~420A |
V-up, OH |
120~220A |
140~260A |
160~280A |
- Typical Chemical Composition of All-Weld-Metal (wt%)(Shielding gas: CO2)
-
Typical Chemical Composition of All-Weld-Metal (wt%)
C |
Mn |
Si |
P |
S |
Ni |
Mo |
0.03 |
1.27 |
0.48 |
0.014 |
0.011 |
0.97 |
0.10 |
- Typical Mechanical Properties of All-Weld-Metal ( Shielding gas : CO2)
-
Typical Mechanical Properties of All-Weld-Metal
Y.S MPa |
T.S MPa |
EL(%) |
CVN-Impact Value J (-30℃) |
551 |
625 |
28 |
70 |
- Welding position
- Approved by
- KS, JIS