- Applications
- WT-71LF is designed for welding of 50kgf/mm² high tensile steel. All position welding of building, shipbuilding, bridges, machineries, vehicles, offshore structures and general fabrications.
- Characteristics on Usage
-
- - WT-71LF is the most widely used rutile type flux cored wire for all position welding.
- - As deposition rate is higher than solid wire and manual metal arc electrode, highly efficient welding can be performed.
- - It provides low fume generation and has good impact strength at low temperatures.
- 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(%) (Shielding gas : CO2)
-
Typical Chemical Composition of All-Weld-Metal(%)
| C |
Mn |
Si |
P |
S |
| 0.04 |
1.35 |
0.55 |
0.02 |
0.01 |
- Typical Mechanical Properties of All-Weld-Meta (Shielding gas : CO2)
-
Typical Mechanical Properties of All-Weld-Meta
| Y.S MPa |
T.S MPa |
EL(%) |
CVN-Impact Value J
(-20℃) |
| 521 |
576 |
28 |
75 |
- Welding position
- Approved by
- KS, DNV, PRS, BV