Question

Cutting tool material 18-4-1 HSS has which one of the following compositions?

(a) 18% W, 4% Cr, 1% V      

(b) 18% Cr, 4% W, 1% V

(c) 18% W, 4% Ni, 1% V

(d) 18% Cr, 4% Ni, 1% V