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Specs for Nickel
Here are the applicable specifications:
QQ-N-290A
There is a nickel finish for almost any need. Nickel can be deposited soft or hard-dull or bright, depending on process used and conditions employed in plating Thus hardness can range from 150-500 Vickers Can be similar to stainless steel in color, or can be a dull grey (almost while) color. Corrosion resistance is a function of thickness. Has a low coefficient of thermal expansion. Is magnetic. All steel parts having a hardness of RC-40 or greater require a post bake at 375°F ±25° for 3 hours.
NOTE: All steel parts having a tensile strength of 240,000 or greater shall not be nickel plated without specific approval of procuring agency.
| Type Class | Thickness | Comments |
| Class 1 | .0016" | For corrosion protection. Plating shall be applied over an underplating of copper or yellow brass on zinc and zinc-based alloys. In no case shall the copper underplate be substituted for any part of the specified nickel thickness. |
| .0012" | ||
| .0010" | ||
| .0008" | ||
| .0006" | ||
| .0004" | ||
| .0002" | ||
| Class 2 | For engineering applications. |
