I'm a second year undergraduate student at Department of Metallurgical Engineering, IIT BHU, and so find myself eligible to answer you. The initial packages are surely less than the circuital branches like CSE, EEE and ECE but you can easily get a package of around 12lpa on average, the highest being 32lpa. IIT BHU gives you enough opportunities to try your hand out in the non core sector, but compared to other branches, the core sector placements are good in number in the department, although the average package being slightly lower compared to the non core sector. If you work hard enough though, no one can stop you from getting a good package. 

Metallurgical engineering does not have good placement records at any IIT even most of the core branches including mechanical civil are also not that good at placement the only branches which are good at placement you find it any engineering college or computer science and engineering electronics and communication engineering electronics and electrical engineering therefore if you are among the students for pursuing this courses then there are plenty of chances that you will be placed otherwiseev the students who are from other branches and get placed choose their profile as programmer for data scientist.