- Applications
- Multi-layer welding of various kinds of structure such as ship buildings, offshore structures, machinery, pressure vessels, large diameter and heavy wall steel pipe.
- Characteristics on Usage
-
- - lt produces the weld metal which has excellent impact value at low temperature service. Single and Multi electrode welding can be performed. lt has excellent X-ray characteristics and slag removal, because of insensiticity to rust, scale, primer on the surface to be welded.
- Notes on Usage
-
- - Dry the flux at 300~350℃ (572~662℉) for 60 minutes before use.
- - When the flux height is excessive, poor bead appearance may occur.
- - Use welding current and speed as low as possible at the first layer of groove to avoid cracking.
- Typical Welding Conditions
-
Typical Welding Conditions
Th
(mm) |
Dia
(mm) |
Groove Design |
Pass |
Amp
(A) |
Volt
(V) |
Speed
(cm/min) |
Remarks |
| 25 |
4.0 |
|
1~13 |
570 |
30 |
40 |
AWS
A5.17 |
| 44 |
4.0 |
|
1st |
1 |
500 |
32 |
40 |
Both side
Multi-pass |
| 2~14 |
600 |
36 |
50 |
| Back gouging |
| 2st |
14 |
500 |
32 |
40 |
| 16~23 |
600 |
36 |
50 |
- Typical Chemical Composition of All-Weld-Metal (%)
-
Typical Chemical Composition of All-Weld-Metal (%)
| C |
Si |
Mn |
P |
S |
BM |
Th(mm) |
| 0.09 |
0.26 |
1.40 |
0.023 |
0.004 |
SS400 |
25 |
| 0.08 |
0.54 |
1.47 |
0.025 |
0.018 |
BS4360-GR50D |
44 |
- Typical Mechanical Properties of All-Weld-Metal
-
Typical Mechanical Properties of All-Weld-Metal
Y.S
MPa(kgf/㎟) |
T.S
MPa(kgf/㎟) |
EL
(%) |
CVN-lmpact Value J (ft·lbs) |
BM |
Th(mm) |
| -20℃ |
-51℃ |
| 555(57) |
614(63) |
29 |
- |
60(6) |
SS400 |
25 |
| 510(52) |
580(59) |
28 |
70(7) |
- |
BS4360-GR50D |
44 |