|
|
 |
|
|
|
|
Description and Applications |
|
H27 is a
high iron oxide powder type electrode, which designed
for flat and horizontal fillet welding. It is used in a
wide range of bead length/burned up electrode length
ratio. It assures a beautiful bead with equal leg length
but without undercuts. High welding efficiency is
obtained when it is used in a combination with a gravity
welder. Suitable for welding of ships, bridges,
buildings and mechanical structures. |
|
|
|
Guideline in Usage |
|
1. |
Electrodes should be re-dried at 70～120℃
for one hour before use. |
|
2. |
Optimum welding current differs depending on
plate thickness, surface conditions, and bead
length/burned up electrode length ratio. It is
necessary, therefore, to observe slag movement
and adjust the current. |
|
3. |
Optimum bead length/burned up electrode
length ratio is 0.8～1.5 for manual welding,
1.0～1.5 for gravity welding. |
|
|
|
|
|
|
Typical
Chemical Composition of Weld Metal（％） |
|
C |
Si |
Mn |
P |
S |
|
0.06 |
0.24 |
0.47 |
0.015 |
0.012 |
|
|
|
|
Typical Mechanical Properties of Weld Metal |
Yield Strength
N/mm2 |
Tensile Strength
N/mm2 |
Elongation
％ |
Impact Value
J(0℃) |
|
430 |
490 |
29 |
70 |
|
|
|
|
Size & Recommended Current Range（AC） |
|
|
|
4.0 |
4.5 |
5.0 |
5.5 |
6.0 |
6.4 |
7.0 |
8.0 |
|
|
550 |
550 |
550
700 |
550
700 |
550
700 |
550
700 |
550
700 |
550
700 |
|
Current (Amp) |
F
FIL |
140~
180 |
170~
210 |
180~
230 |
210~
260 |
240~
290 |
260~
310 |
280~
330 |
320~
380 |
|
|
|
|
 |
