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Description and Applications |
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HX-7 is a high iron oxide powder type
electrode for flat and horizontal fillet welding.
High welding efficiency is obtained when it is used in
combination with a gravity welder.
For welding of mild steels for ships, buildings,
bridges, and machinery.
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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. It
is necessary to observe slag movements and
adjust the current |
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3. |
Optimum
bead length/burned up electrode length ratio is
0.9∼1.6 for manual welding, and 1.0∼1.6 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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0.05 |
0.23 |
0.52 |
0.020 |
0.009 |
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Typical Mechanical Properties of Weld Metal |
Yield Strength
N/mm2 |
Tensile Strength
N/mm2 |
Elongation
％ |
Impact Value
J(-20℃) |
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437 |
520 |
30 |
56 |
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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 |
160~
200 |
180~
220 |
200~
250 |
240~
280 |
280~
320 |
300~
340 |
320~
360 |
320~
380 |
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