MIL-N-46025 Nickel Bar, Flat Wire Ribbon And Strip For Electronic UseThis specification covers one grade of nickel for electronic use in the forms of bar, flat wire ribbon and strip see 6.1.

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MIL-N-46025B(MR)

4.3 Sampling. Samples taken for the purpose of tests prescribed in this specification shall be selected in a manner as to represent correctly the material furnished and avoid needless destruction of finished material when samples representative of the material are available from other sources.

4.3.1 Sampling for chemical analysis. A sample for chemical analysis shall be obtained from each 500 pounds of material that can be identified by melt. Where material cannot be identified by melt, 2 samples shall be obtained. The samples shall be selected in a manner calculated to disclose any nonuniformity of material within the lot. From each sample,

not less than 2 ounces of clean millings, drillings, or clippings shall be obtained.

4.3.2 Sampling for mechanical properties.

4.3.2.1 Tension test. Unless otherwise specified in the contract or order, one tension test specimen shall be taken from each 500 pounds of material in the lot.

4.3.2.2 Hardness test. Unless otherwise specified in the contract or order, one test specimen shall be taken from each 500 pounds of material in the lot.

4.3.3 Sampling for visual and dimensional examination. From each lot of material a representative sample shall be selected in accordance with MIL-STD-105, inspection level III, acceptable quality level (AQL) 1.5 percent defective. Pieces selected for dimensional examination may be the same as those selected for visual examination.

4.3.3.1 When flat wire (ribbon) is furnished in coils or on reels or spools, the sample for examination shall be taken from within 10 feet of the outer end. If the sample selected is rejected due to handling marks, and additional 20 feet shall be used for reexamination.

4.4 Examination.

4.4.1 Visual and dimensional. Pieces selected in accordance with 4.3.3 shall be visually examined to determine compliance with the requirements for workmanship (see 3.6) and shall be measured for compliance with the dimensional requirements (see 3.3., 3.4, 3.5) of this specification.