Defines requirements for nickel-chromium-titanium-aluminium heat-resisting alloy in the following forms, for the manufacture of fasteners: a) Bar and wire for machining: cold worked and solution treated, designation HR 601A, b) Bar and wire for continuous cold forging or cold extrusion: cold worked and softened, designation HR 601B, and c) Bar and wire for hot upset forging: cold worked, designation HR 601C.