Protective gas used in the annealing furnace for steel coil comprises of (A) 95% N2 + 5% H2 (B) 5% H2 + 9% N2 (C) 100% CO (D) 100% H2

Protective gas used in the annealing furnace for steel coil comprises of
(A) 95% N2 + 5% H2
(B) 5% H2 + 9% N2
(C) 100% CO
(D) 100% H2
by

1 Answer

Answer :

(A) 95% N2 + 5% H2
by

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