What must be added to a steel in order for it to be in the austenite phase at room temperature?

a. greater than 13% chromium
b. about 13% chromium
c. greater than 8% nickel (this could also be a correct answer)
d. chromium and nickel correct - (however, Cr isn't necessary - actually, Cr stabilizes the alpha!)
e. none of the above; steel can't be austenite at room temperature

Correct Answer: D

To harden, for steels, means to

a) make austenite
b. make pearlite
c. make martensite correct
d. make ferrite
e. none of the above

When quenching AUS, MAR is formed by:

a. diffusion
b. normal stresses
c. a shear process correct
d. eutectoid bypass
e. None of the above

Stainless steels have:

a. high oxygen content
b. low chromium content
c. high chromium content correct - (depends on what is meant by 'high' and 'low')
d. low carbon monoxide content

What is the most severe quenching medium?

a. air
b. water
c. brine correct
d. oil