Is it really worth joining Material Sciences and Metallurgy Engineering at PEC, Chandigarh?

It depends upon your expectations, your goals, your abilities, etc. The worth of doing Material Sciences and Metallurgy Engineering at PEC Chandigarh will depend on the following factor:

• If you gave your very best at the entrance exams but still could not score well enough to get a higher rank which would have given you an option for a better college or branch, then probably it is best to move on and choose the branch and the college. There will be opportunities here as well, no doubt about that.
• If you think you did not give your full efforts and you could do better in the next year, then definitely you should drop a year for better preparation. It is better to drop rather than lamenting in the future that you did not give your 100% and got stuck here.
• If you prefer engineering and you are passionate about the subject, then the college reputation and brand should not bother you much. It is about the learning you would get and not about other stuff like rankings, placements, etc. You would get plenty of options and opportunities here as well and after graduating too.
• If placements matter to you more than anything and you do not have any preference about the branch you would get, then definitely you should prefer a college with a better reputation, placements, etc.

PEC Chandigarh is not a bad college and has a legacy of close to 100 years now. It is also ranked 68 in the NIRF 2020 engineering college rankings. Take a decision based on what you want rather than superficial stats and other things.