Mil-C-26074E

Electroless depostion of Nickel-Phosphorous Alloy coatings on metal and composit surfaces
Class 1 As plated, no subsequent heat treatment
Class 2 Heat treated to obtain required hardness
Class 3 Aluminum alloys nonheat-treatable,
processed to improve adhesion of deposit
Class 4 Aluminum alloys, heat-treatable, processed
to improve adhesion of deposit
.
Thickness
Grade A .0010 inch minimum
Grade B .0005 inch minimum
Grade C .0015 inch minimum.