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Physics Chemistry

Engineering :: Metallurgy

  Which of the following is high speed steel?
[A]. T 55 Ni Cr 65 Mo 30[B]. T 75 W 18 Co 6 Cr 4
[C]. T 10 Cr 5 Mo 75 V 23[D]. T 75 W 18 Co 6 Cr 4 V 1 Mo 75
[E]. None of the above    

Answer: Option D
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