Q13
Thread rolling is restricted to
A.
Ferrous materials
B.
Ductile materials
AnswerC.
Hard materials
D.
None of these
Answer: Option B
Solution
Answer: Option B
Solution:
Materials are limited to ductile materials because the threads are cold formed. .Also, materials with good deformation characteristics are necessary for rolling; these materials include softer (more ductile) metals and exclude brittle materials, such as cast iron.