It can be somewhat said as a stream of Mechanical Engineering rather than going into chemical because it deals with the materials. You've to be very firm and particular to understand your choices. There are differences too between the two.

• Mechanical engineering is a broad engineering specialization that involves the design, analysis, construction and maintenance of various machine systems or tools whereas Metallurgical engineering is an engineering field which deals with all kinds of metal related areas.
• Mechanical engineering field utilizes the principles of physics and material sciences for the concerned tasks whereas Metallurgical engineering is a field that involves the study of physical and chemical features of metals and its related issues.

(http://entrance-exam.net/difference-between-mechanical-engineering-and-metallurgical-engineering/#ixzz61eafx4yY)

Best wishes. Thank-you.