were cast in green sand molds, annealed at 1750o F for 18 hours and air cooled. After air cooling they were reheated a second time at 1600o F, quenched in oil to form a martensitic microstructure and then tempered for 3 to 4 hours at 1150-1180o F. The reported properties for this part were: a 100 ksi minimum tensile strength, 80 ksi yield strength, and 2% elongation. The cast connecting rod was reported to be economically competitive with its forged counterpart with savings coming from the extended machine tool life associated with the excellent machining qualities of the pearlitic malleable iron from which it is cast.