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Description and Applications |
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HJ800 is an
excellent hard facing electrode for repairing cutter
knives, dies, crusher jaws, etc. It has extremely high
hardness and good abrasion wear resistance caused by
precipitation of Carbide (Chromium Carbide and
Molybdenum Carbide, etc.). |
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Guideline in Usage
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1. |
Electrode should be re-dried
at 250∼300℃
for 60 minutes before use. |
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2. |
Slow cooling is
recommended after welding to avoid cracking |
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3. |
Preheating at more than 200℃
and Post heating at 500∼600℃
are required. |
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Typical
Chemical Composition of Weld Metal（％） |
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C |
Si |
Mn |
Cr |
Special Element |
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3.35 |
0.38 |
0.49 |
26.9 |
≦2.0 |
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Typical Hardness of
Weld Metal |
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As-Welded |
Vickers |
Rockwell (HRC) |
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740∼830 |
58∼64 |
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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 |
90~130 |
120~180 |
170~230 |
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