Do LENOX bi-metal blades contain Cobalt? Mike October 30, 2020 05:33 Updated Yes, LENOX blades are made out of M42 tool steel which contains Cobalt as one of the elements that makes up the steel. Related articles What is the finest tooth pitch for carbide band saw blade? How much tension can a bi-metal blade handle? Comments 0 comments Please sign in to leave a comment.