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Description and Applications |
HJ300B is a low
hydrogen type electrode. The hardness of deposited metal
is approximately HV330 Vickers as welded. Machining is
applicable in general.
For surfacing machine parts, such as the shaft,
spindles, rollers gears, and carbon and cast steel that
are difficult to weld. |
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Guideline in Usage
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1. |
Preheat at more
than 150℃ |
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2. |
Keep the arc as short as
possible. |
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3. |
Electrodes should be re-dried
at 300∼350℃
for 60 minutes before using. |
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4. |
Remove dirt such as oil and
dust from the grooves. |
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Typical
Chemical Composition of Weld Metal（％） |
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C |
Si |
Mn |
P |
S |
Cr |
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0.08 |
0.10 |
4.20 |
0.015 |
0.0110 |
1.08 |
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Typical Hardness of
Weld Metal (Vickers Hardness) |
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As Welded |
After Work
Hardening |
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295 |
406 |
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Size & Recommended Current Range（AC
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3.2 |
4.0 |
5.0 |
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350 |
400 |
450 |
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Current (Amp) |
F |
100~140 |
140~190 |
180~230 |
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V. OH |
90∼120 |
120∼170 |
－ |
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