MILITARY PLATING SPECIFICATIONS PROCESS …

1 MILITARY PLATING SPECIFICATIONSPROCESS MIL. SPEC. THICKNESS COMMENTSCHROME QQC-320bExcellent hardness(Rc 68-74) Type .. BrightWear resistance, and erosion Type .. Has low coefficient Class .. Decorative PLATING . (usually overOf friction, and is resistant to copper and nickel undercoats.)

2 Heat. In addition to above Class as specified on Engineering PLATING . Properties, can be rendered on drawing. Pourous for lubrication bake at 375 deg +/- 25 deg Class .. Plated to specified dimensions orF for 3 hrs or as specified. Processed to specified Dimensions after peening and post baking Class.

3 Parts below Rockwell C40 andNot required. And subject to static loads or Designed for limited life under Dynamic peen per MIL-S-13165 Class.

4 Parts below Rockwell C40 and Designed for unlimited life under Dynamic bake at 375 deg +/- 25 deg Class .. Parts have hardness of RockwellF for 3 hrs. C40 or above and subject to static Loads or designed for limited life Under dynamic loadsShot peen before PLATING .

5 Class .. Parts have hardness of RockwellPost bake at 375 deg +/- 25 deg C40 or above and are designed F for 3 hrs. for unlimited life under dynamic NICKEL Mil-C-26074 BSimilar to stainless steel in color.

6 Class Unless otherwise As coatedPlates uniformly in recesses and Class Steel, copper, nickel, and cobaltCavities (does not build up on base alloys. Heat treated afterEdges. resistance is good for Class .. Aluminum alloys other thanCoatings over.)

7 001 thickness. Alloy 7075. Heat treated after nickel is used extens- Grade .001 .. Minimum thickness. For iron andIvely in salvage of mis-machined aluminum based Also, for inside dimensions Grade .0005 .. Minimum thickness. For copper, And irregular shapes (where assy nickel, and cobalt based need uniformity pro-Vided by electroless PROCESS .)

8 NICKEL QQ-N-290 AClass 1 PLATING is used to pro- Class .. Corrosion protective iron, copper, or zinc Steel, Zinc & Copper andAlloys against corrosive attack. Zinc alloys. Copper alloysUsed as undercoat for chromiumOr precious metals; or for d cor- Grade .0016 .. SD, and M.

9 Ative. Grade .0012 .. SD, and M SB, and MForms of nickel deposition: Grade .0010 .. M SB,SD, and MSB-Single layer coating. Fully Grade .0008 .. SB, SD & M1 SD & MBright finish: SD-single layer in Grade .0006 .. SB, SD, & M1 SB, SD, & M1A dull or semi bright finish. Grade .0004 .. SB, SD, & M1 SB, SD, & M1(Contains less than.)

10 005 % sulfer) Grade .0002 .. SB, SD, & M1M-Multi-layer coating. See 2 PLATING . Resistance and Note: 1; SD or M may be sub-Abrasion resistance: for build up Class .. stituted for SB in mild or mod-Of worn or undersized parts: pro- Nickel plated to erate service against corrosive spec thickness.