Lokomotiv first to reach KHL final
On Thursday they defeated Metallurg Magintogorsk 2-0 to win their best-of-seven contest 4-1.
Two quick goals late in the second gave the host its vital edge.
Lokomotiv will play the winners of the other semi-final between AK bars and Dynamo Moscow.
Ak bars are 3-1 up in their series and victory in Moscow on Friday would see them through.