18-4-1
high speed steel contains
18
% carbon
4
% carbon
1 % carbon
0.7
% carbon
0.7
% carbon
A
common type of high speed steel contains 18% tungsten, 4% chromium, 1% vanadium
andonly
Hence,
the correct option is (D).
Preparing students for success in a changing World.
We care about our students
RPSC-AE, RSMSSB-JE, SSC-JE, RRB-JE, PSU's