- Applications
- WT-71 is designed for welding of 50kgf/mm² class high tensile steel. All position welding of building, shipbuilding, bridges, machinery, vehicles, offshore structures and general fabrications.
- Characteristics on Usage
-
- - WT-71 is rutile type flux cored wire for all position welding.
- - Compared with solid wire, good X-ray safety, spatter loss is low, bead appearance is beautiful and arc is soft with good stability.
- - Slag covering is uniform with good removal.
- - WT-71 has very efficient welding due to higher deposition rate.
- Notes on Usage
-
- - Proper preheating(50~150℃) 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.
- - Shielding gas should be used 100%CO2 or Ar+20~25% 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 |
0.04 |
1.29 |
0.55 |
0.013 |
0.010 |
- 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 (-20℃) |
548 |
580 |
28 |
76 |
- Welding position
- Approved by
- KS, ABS, DNV, KR, NK, LR, BV, JIS, CE, CWB