Q. Which of the following is high speed steel? (Solved)

1. T 55 Ni Cr 65 Mo 30

2. T 75 W 18 Co 6 Cr 4

3. T 10 Cr 5 Mo 75 V 23

4. T 75 W 18 Co 6 Cr 4 V 1 Mo 75

5. None of the above

  • d. T 75 W 18 Co 6 Cr 4 V 1 Mo 75
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