Engineering Materials
The brown smoke during the operation of a Bessemer converter indicates that the

Air is burning out silicon and manganese
Silicon and manganese has burnt and carbon has started oxidizing
The converter must be titled to remove the contents of the converter
The brown smoke does not occur during the operation of a Bessemer converter

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Engineering Materials
Inconel contains

68% nickel, 29% copper and 3% other constituents
65% nickel, 15% chromium and 20% iron
80% nickel and 20% chromium
80% nickel, 14% chromium and 6% iron

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