Question

High alloys steels are preheated up to what temperature?

(a) 350°C

(b) 400°C

(c) 450°C

(d) 500°C

This question was posed to me in an internship interview.

I'd like to ask this question from Welding of Various Metals in section Welding and Related Processes of Casting-Forming-Welding II

Answer 1

Correct answer is (b) 400°C

To explain I would say: High alloy steels are those steels which contain high amount of carbon in them. These alloys need to be preheated before welding in order to avoid cracking. The temperature up to which these alloys are preheated is 400°C.