QQ-N-286 Nickel-Copper-Aluminum Alloy, Wrought Uns N05500This 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.

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Inspection shall be performed after the aging treatment.  Ultrasonic

QQ-N-286G

procedures other than those specified may be employed but they shall be approved by the command or agency concerned.

3.7.1.2  Small bar, rod, plate and forgings.  When specified (see 6.2), bar, rod, plate, and forgings shall be ultrasonically inspected to 4.3.3.1 and

4.3.3.3.

3.7.2  Liquid penetrant inspection.  When specified (see 6.2), bar, rod, plate, and forgings shall be liquid penetrant inspected to 4.3.4.

3.8  Wrapping requirements (cold drawn wire).

3.8.1  Cold drawn and annealed, and cold drawn, as drawn � inch diameter or less.  Wire  of  cold  drawn  and  annealed,  and  cold  drawn,  as  drawn  conditions shall  withstand  wrapping  eight  consecutive  close  wound  turns,  without cracking,  around  a  rod  of  the  same  diameter  as  the  wire.

3.8.2    Spring temper � inch diameter or less.    Wire  of  spring  temper  up  to

0.2294  inch  diameter,  inclusive,  shall  withstand  wrapping  eight  consecutive

close  wound  turns,  without  cracking,  around  a  rod  of  the  same  diameter.    Wire

over  0.2294  inch  in  diameter  shall  withstand  similar  wrapping,  without

cracking,  around  a  rod  of  twice  the  wire  diameter.

3.8.3    Age hardened or over � inch diameter.    There  are  no  wrapping requirements  for  wire  in  the  age  hardened  condition  or  with  a  diameter  greater than  �  inch.

3.9    Dimensional requirements.

3.9.1    Bar and Rod.

3.9.1.1    Diameter, distance between parallel faces, or thickness.    The diameter,  distance  between  parallel  faces,  or  thickness  of  hot  finished  or cold  drawn  bar  and  rod,  aged  and  unaged,  shall  not  vary  at  any  point  by  more than  the  amounts  specified  in  tables  VII  or  VIII,  as  applicable.

3.9.1.2    Out of roundness.    Round  rod,  cold  drawn,  and  hot  finished,  all sizes  and  in  straight  lengths,  shall  not  be  out  of  round  by  more  than  one-half the  permissible  tolerances  in  diameter  specified  in  tables  VII  and  VIII.

3.9.1.3    Length.

3.9.1.3.1    Bar and rod.    Unless  otherwise  specified  (see  6.2),  bar  and  rod shall  be  furnished  in  random  mill  lengths  with  cut  or  sheared  ends.    Rod  and bar  furnished  to  nominal  (stock)  lengths  shall  be  furnished  with  either cropped  or  cut  ends.  Material  ordered  to  cut  lengths  shall  be  furnished  with square  cut  or  machined  ends.    Where  rod  and  bar  is  ordered  in  multiples  of  a specified  unit  length,  �  inch  shall  be  allowed  for  each  multiple  cut  unless otherwise  specified  (see  6.2),  and  the  rod  and  bar  shall  have  cut  ends.

3.9.1.3.2    Permissible variations in length.    The  permissible  variations in  lengths  of  rod  and  bar,  all  conditions,  shall  be  as  specified  in  table  IX.

3.9.1.4    Edges.    Unless  otherwise  specified  (see  6.2),  square, rectangular,  and  hexagonal  bar  and  rod  shall  have  angles  and  corners consistent  with  commercial  practice.

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