1.1 This specification covers hot- or cold-worked hafnium rod and wire. 1.2 This specification contains two material grades, one specifically for nuclear applications (Grade R1) and one for commercial alloying applicat This specification covers hot-, cold-, or both hot- and cold-rolled hafnium rods and wires in either one of two grades. All grades should be in the recrystallization annealed condition unless specified otherwise. The materials should be made from ingot