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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QQ-N-286G

3.9.1.5  Straightness.  The permissible variations in straightness of rod

and bar, as determined by the departure from the true straightness (throw in

one revolution or depth of chord), shall be as specified in tables X and XI.

3.9.1.5.1  Permissible variations in straightness.  The permissible variations in straightness of precision straightened cold drawn rod and shafting, as determined by the departure from straightness (throw in one revolution), shall be as specified in table XI.  All precision straightened rod shall be checked for straightness when supported on rollers at 42 inch intervals, and also on rollers on the ends of the rod, in diameters and lengths, as specified in table XI.

TABLE VII.  Tolerances on diameter or distance between parallel faces of hot finished bar and rod.

16    8     16

16    8

1/    Tolerances  apply  to  diameter  of  rounds,  to  distance  between  parallel surfaces  for  hexagons  and  squares,  and  separately  to  width  and  thickness of  rectangles.

2/    Permissible  variations  available  as  plus  0.005  inch,  minus  0;  or  plus

0.0025  inch,  minus  0.0025  inch,  when  specified  (see  6.2).

3/    Spot  grinding  may  be  permitted  to  remove  minor  surface  defects.    The  depth of  grinding  shall  not  exceed  3  percent  of  the  diameter.

4/    Areas  on  the  ends  of  the  bar  and  rod  (for  approximately  1  inch)  that  are under  the  permissible  variations  in  diameter  are  permitted  provided  the desired  finished  surface  can  be  obtained  within  the  machining  allowance (see  3.11).

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