It would be tough to tell you the exact as the cutoff varies every year depending on the various factors. You can check the previous year cutoff rank branches wise of SC category to take an Idea about your admission possibilities.

https://dqxeclau.top/colleges/sri-sivasubramaniya-nadar-college-of-engineering-kalavakkam/cut-off?cid=2534&college_id=3271&exam_id=1101&seat_type=126987&category=1353

Good Luck!