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     EduGorilla 
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    What is the main difference between High Speed Steel and Super High Speed Steel?

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    1. The latter contains 2 to 15% of cobalt in addition to tungsten, vanadium and chromium.
    2. The latter contains 2 to 15% of molybdenum in addition to tungsten, vanadium and chromium.
    3. The percentage of tungsten is less in the latter than that in the former.
    4. Both are the same.
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