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)

             Table I.  Chemical composition

Element                             Percent1        

Nickel2

Others, total

Iron

Copper

Manganese

Carbon

Silicon

99.0 min.

1.00

0.30

.20

.35

.15

.20

Sulfur                                .008        

1Maximum unless otherwise indicated.

2Cobalt counting as nickel

3.1.2  Analysis shall be made routinely only for the elements specifically mentioned in table I.  If, however, the presence of other elements is suspected, or indicated in amounts greater than the specified limits further analysis shall be made to determine that the total of other elements is not in excess of these limits.

3.1.2.1  The contractor shall furnish analysis of each melt showing the percentage of each of the elements designated in table I.

3.1.2.2  Chemical analysis by the contractor of the individual melts may be waived at the discretion of the procuring activity provided that the producer's method of the composition control is acceptable or that all material in the lot can be identified as being from melts previously analyzed and found to be in conformance with the chemical composition requirements.

3.2  Mechanical properties.  The mechanical properties of nickel bar, flat wire (ribbon) and strip shall be in accordance with the requirements specified in tables II and III.

                     Table II.  Tension test requirements        

Tensile strength, psi

                   Size         Temper          min.            max        

Flat wire

All sizes

Annealed          -

75,000

   (ribbon)                     As drawn        80,000             -        

3

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