question_answer

Percentages of various alloying elements present in different steel materials are given below:

1. % W ; 4% Cr ; 1% V; 5% Co ; 0.7% C

2. 8% Mo; 4% Cr; 2% V; 6% W; 0.7% C

3. 27% Cr ; 3% Ni; 5% Mo ; 0.25% C

4. 18% Cr ; 8% Ni ; 0.15 C.

Which of these relate to that of high speed steel?

A) 1 and 3            

B) 1 and 2

C) 2 and 3            

D) 2 and 4