Raj Milk took the lead minutes before the lemon break through striker Bishwajeet Das who netted the ball with an accurate angular shot.
In the second half, R K Steel combined together to bounce back into the game and raided the opponent territory at regular interval.
Equaliser came in the 83rd minute when defender Kingsley's strong right footer found the target (1-1).
Both teams ended at 1-1 in the end as well in extra time when referee imposed tie-breaker.
Raj Milk FC would clash with Army Regimental Centre (Shillong) in the final on May 22.