Question

Which of the following alloy has up to 2% nickel content?

(a) Ferritinic

(b) Austenitic Type 304

(c) Martensitic

(d) Austenitic Type 316

I got this question during an interview for a job.

Question is taken from Properties of Fermentation Vessels topic in chapter Fermentation System & Management of Fermentation Technology

Answer 1

Correct option is (c) Martensitic

The explanation: Martensitic alloy has nickel content of up to 2% with 10 – 12 % of chromium and 0.2 – 0.4% carbon content. Austenitic alloys have more than 10% of carbon content and ferritinic alloys have little or no nickel content.