New Cumberland Police Chief Lester Skinner says 39-year-old Jeffery Scott Fish and 38-year-old James E. Fish were killed in the Thursday afternoon blast.
A third employee, 27-year-old Steven Swain, was badly burned and was receiving surgery and other treatment at Pittsburgh hospital.
The second injured victim was Dave Williams, an outside contractor who was at the AL Solutions Inc. plant at the time. He was being treated for burns to his hands and face.
The cause of the blast is being investigated. Skinner says they believe the workers were processing powdered titanium, an additive for aluminum.