Which variety of steel may be expected to have lowest value of thermal conductivity?

Question

Quizplus · Accepted Answer

Chromium nickel steel (9% Ni, 18% Cr) is expected to have the lowest thermal conductivity among the options given. This is because the addition of high amounts of alloying elements like nickel and chromium generally decreases the thermal conductivity of steel. These elements disrupt the pure iron lattice structure, scattering phonons and electrons more effectively, which in turn reduces the material's ability to conduct heat.

Which Variety of Steel May Be Expected to Have Lowest