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.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - 21 - 22 - 23 - 24 - 25 - 26 - 27 - 28 - 29 - 30 - 31 - 32 - 33 - 34 - 35 - 36 - 37 - 38 - 39 - 40 - 41 - 42

4.2.2 Sampling of lots.

QQ-N-286G

4.2.2.1 Chemical analysis. One representative sample shall be obtained from each lot.

A) Ladle analysis may be used.

B) For wire 0.032 inch diameter and less, samples may be taken from the final starting size prior to the final cold reduction.

4.2.2.2 Slow strain rate tensile tests. Three specimens shall be prepared and tested per lot. They shall be taken from one end of a bar, rod, or forging at the quarter diameter (half radius) and in the longitudinal direction. Bars, rods, or forgings too small to have a slow strain rate test specimen taken from the quarter diameter that are taken from a lot (see

4.2.1.3) that does not have any larger sizes shall have the specimens taken from the center and in the longitudinal direction. Bars, rods, or forgings too small to have a slow strain rate test specimen taken from the center that are taken from a lot (see 4.2.1.3) that does not have any larger sizes shall

be taken from the heat at the latest intermidiate rolling or forging step that a slow strain rate test specimen can be taken from the mid radious and heat treated using the same heat treatment procedures used on the production heat. Specimens shall be taken after the final heat treatment. When the material is shipped in the annealed condition, specimens may be taken after the final anneal and shall be heat treated in accordance with 4.3.6.1.

4.2.2.3 Mechanical, bend and wire wrapping tests for rod, bar, wire, and flat products. One test specimen shall be taken from each lot of 30,000 pounds, or less. Two test specimens shall be taken from lots weighing over

30,000 pounds.

4.2.2.4 Sampling of lots for mechanical tests of forged parts, 250 pounds and less. Specimens from the lot shall be taken from prolongations unless the shape of the finished part permits a suitable specimens to be removed without loss of the forging, or the specimens may be taken from extra forgings. One specimen shall be taken from lots of 30,000 pounds or less and two specimens shall be taken from lots over 30,000 pounds.

4.2.2.5 Sampling of lots for mechanical tests of forged parts, greater than 250 pounds. Each forging shall be tested. Specimens shall be taken from prolongations unless the shape of the finished part permits a suitable sample piece to be removed without loss of the forging.

4.2.2.6 Sampling for visual and dimensional examination.

4.2.2.6.1 Small forged parts (less than 250 pounds) and all other forms. From each lot, representative samples for inspection of visual and dimensional characteristics including packaging, packing, and marking requirements shall

be taken in accordance with table XXIV. In case of wire, a unit shall be one coil of wire.