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Open hearth process did not allow the steel to be in contact with which gas?(a) Nitrogen(b) Helium(c) Carbon dioxide(d) NeonI got this question during an online exam.My question is taken from Open Hearth Surface in chapter Metal Furnace and Practice of Casting-Forming-Welding II

Answer»

Correct answer is (a) NITROGEN

Explanation: The contact of STEEL with the nitrogen gas causes the steel to become brittle. This was one of the DIFFICULTIES which was later overcome by open hearth furnace.



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