QQ-N-286G

Abstract

This specification covers all nickel-copper-aluminum alloy wrought forms formerly classified as class A. This alloy is designated under the Unified Numbering System for Metals and Alloys as UNS N05500. Except for cases where nonmagnetic properties are paramount, this alloy is intended to be age hardened prior to placing the material in service. <b><u>Intended Use:</u></b> Nickel-copper-aluminum alloy, UNS N05500 is used where a combination of high strength and resistance to corrosion are needed. For optimum tool life the annealed condition is recommended. Cold drawn material is intended for automatic machining operations. Nickel-copper-aluminum alloy sheet and strip in the annealed condition may be used in the manufacture of articles in which heading, bending, curling, drawing, forming, lock-seaming, welding, and so forth, operations are involved. Cold rolled strip of half hard and full hard temper are used where light deformations or liberal bending radii are involved, for applications such as springs. Nickel-copper-aluminum alloy wire in the annealed condition is intended for severe forming, cold heading, and roll threading operations. Nickel-copper-aluminum alloy wire, spring temper in the as drawn condition is intended for coiling of helical springs which are to be aged hardened after coiling in order to obtain maximum strength and hardness. Where helical springs are to be cold pressed, the cold pressing is to be done after coiling and aging. <br>