- Applications
- WT-71SR is designed for welding of 490MPa a low temperature steels.(NACE/API steel)
It can be used in a variety of applications including railcar, automotive, machinery, shipbuilding, bridges, heavy equipment etc.
- Characteristics on Usage
-
- - lt is a rutile type flux cored wire for all-position welding.
- - It provides smooth arc, low spatter levels, good weldability and good bead appearance.
- - It is design good impact value at low temperatures down to -40°C in PWHT conditions.
- 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.
- - Gas flow rate is proper 20~250/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 |
| 0.05 |
1.21 |
0.41 |
0.011 |
0.009 |
0.40 |
- 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
(-40℃) |
PWHT |
| 552 |
598 |
26 |
142 |
AW |
| 521 |
576 |
27 |
138 |
620℃×2hr |
- Welding position
- Approved by
- JIS, ABS, DNV, CE, CWB