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Description and Applications |
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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. |
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Guideline in Usage |
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1. |
Electrodes should be re-dried at 70∼120℃
for one hour before use. |
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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. |
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3. |
Optimum bead length/burned up electrode
length ratio is 0.8∼1.5 for manual welding,
1.0∼1.5 for gravity welding. |
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Typical
Chemical Composition of Weld Metal（％） |
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C |
Si |
Mn |
P |
S |
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0.06 |
0.24 |
0.47 |
0.015 |
0.012 |
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Typical Mechanical Properties of Weld Metal |
Yield Strength
N/mm2 |
Tensile Strength
N/mm2 |
Elongation
％ |
Impact Value
J(0℃) |
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430 |
490 |
29 |
70 |
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Size & Recommended Current Range（AC） |
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4.0 |
4.5 |
5.0 |
5.5 |
6.0 |
6.4 |
7.0 |
8.0 |
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550 |
550 |
550
700 |
550
700 |
550
700 |
550
700 |
550
700 |
550
700 |
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Current (Amp) |
F
FIL |
140~
180 |
170~
210 |
180~
230 |
210~
260 |
240~
290 |
260~
310 |
280~
330 |
320~
380 |
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