Question

Which of the following types of stainless steels contain maximum amount of chromium in it?

(a) Duplex stainless steels

(b) Martensitic stainless steels

(c) Austenitic stainless steels

(d) Precipitation hardenable stainless steels

The question was asked in an interview for job.

The above asked question is from Melting of Steel and Stainless Steel topic in portion Foundry Introduction & Materials of Casting-Forming-Welding II

Answer 1

The correct answer is (a) Duplex stainless steels

The best I can explain: Duplex stainless steels contain approximately 25 % of chromium while rest of the stainless steels contain less than that of duplex stainless steels. All the stainless steel materials contain chromium and carbon besides other elements. In production of stainless steels, controlling of carbon and chromium content should be proper.