0 votes
618 views
asked in production by (215k points)
Some high speed steels have cobalt (Co) added to them in amounts ranging from 2% to 15%, since this element improves the      

(a) Cutting efficiency, especially at high temperature

(b) Depth hardening ability of the HSS tool

(c) Red hardness of the HSS tool

(d) Grain structure of the HSS tool

Please log in or register to answer this question.

Welcome to Q&A discussion forum, where you can ask questions and receive answers from other members of the community.

10.4k questions

274 answers

26 comments

15.3k users

...