HI,

YES You have chances of getting into sastra ,there is no cutoff for sastra

admissions are based on 

Stream 1:

JEE Main 2019 and normalized 10+2 scores will be taken together for admission under stream 1

The scores of JEE Main will carry 25% weightage and 10+2 scores will carry 75% weightage.

The combined scores will be used to prepare the rank list and candidates will be invited for admission on the basis of the rank list.

70% of seats will be filled under stream 1.

Stream 2:

Candidates will be considered for admission based on their normalised aggregate 10+2 or any equivalent exam scores.

30% of seats will be filled under stream 2.

By this we can say that If you will get good JEE main rank then only you'll be eligible to enter into Sastra.'

for more details check the link below

https://engineering.careers360.com/articles/sastra-btech-admission

GOOD LUCK