- Applications
- WT-81B2 is designed for welding of 1.25%Cr-0.5%Mo steel used for high pressure vessels, oil refining industries, steam pipes of boilers etc.
- Characteristics on Usage
-
- - It is a rutile type flux cored wire for all-position welding.
- - It provides smooth arc, low spatter levels, good weldability and good bead appearance.
- - The weld metal contain about 1.25%Cr, 0.5%Mo, so it has good crack and heat resistance.
- Notes on Usage
-
- - Gas flow rate is proper 20~25ℓ/min.
- - Shielding gas should be used 100% CO2 or Ar+20~25%CO2.
- - Preheat at 150~200℃ and PWHT at 690℃.
- 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 |
Cr |
Mo |
0.07 |
0.82 |
0.42 |
0.016 |
0.015 |
1.18 |
0.51 |
- Typical Mechanical Properties of All-Weld-Metal (Shielding gas : CO2)
-
Typical Mechanical Properties of All-Weld-Metal
Y.S MPa |
T.S MPa |
EL(%) |
PWHT |
569 |
648 |
22 |
690℃×1hr |
- Welding position