Engineering Materials
The hardness and tensile strength in austenitic stainless steel can be increased by

Normalizing
Full annealing
Martempering
Hardening and cold working

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

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

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