1. Materials: Grade 1, 2, 5, 6, 7, 9, 12, 23. 2. Specification: ASTM B381, AMS 4920 3. Size: as per customer sample or drawing 4. Processing: Open die forging / stamp forging / ring rolling / rotary swaging Surface treatment: As-forged or machined to be bright Average temper condition: Annealed