What is the amount of tungsten used in HPF steel?
(a) Less than 0.03%
(b) Less than 0.02%
(c) Less than 0.04%
(d) Less than 0.05%
I got this question at a job interview.
I want to ask this question from Inverse Rate Curves for Steel in section Heat treatment of Metals and Alloys of Casting-Forming-Welding II