MIL-DTL-81706B
SOCIETY OF AUTOMOTIVE ENGINEERS (SAE) INTERNATIONAL
SAE-AMS4027
-
Aluminum Alloy, Sheet and Plate, 1.0Mg-0.60Si-0.28Cu-
0.20Cr, (6061; -T6 Sheet, -T651 Plate), Solution and
Precipitation Heat Treated. (DoD adopted)
SAE-AMS4037
-
Aluminum Alloy, Sheet and Plate, 4.4Cu-1.5Mg-0.60Mn,
(2024; -T3 Flat Sheet; -T351 Plate), Solution Heat Treated.
SAE-AMS4045
-
Aluminum Alloy, Sheet and Plate, 5.6Zn-2.5Mg-1.6Cu-
0.23Cr, 7075: (-T6 Sheet, -T651 Plate), Solution and
Precipitation Heat Treated. (DoD adopted)
(Copies of these documents are available from the SAE International, 400 Commonwealth
Drive, Warrendale, PA 15096-0001 or www.sae.org.)
2.4 Order of precedence. In the event of a conflict between the text of this document and
the references cited herein, the text of this document takes precedence. Nothing in this
document, however, supersedes applicable laws and regulations unless a specific exemption has
been obtained.
3. REQUIREMENTS
3.1 Qualification. The chemical conversion materials furnished under this specification
shall be products that are authorized by the qualifying activity for listing on the applicable
qualified products list before contract award (see 4.2 and 6.5).
3.2 Coating materials. All ingredients used in the chemical conversion materials shall meet
the requirements of this specification. Type I materials shall be formulated from hexavalent
chromium compounds, other inorganic salts such as phosphates or fluorides, catalysts, activators,
and accelerators. Type II materials shall be formulated from salts, catalysts, activators, and
accelerators that contain no hexavalent chromium. The materials, in an aqueous solution, shall
form a conversion coating nonelectrolytically.
3.3 Application. The material, after proper mixing, shall be a material selected for
treatment of the prepared metal in accordance with the supplier's instructions, by spray, brush,
immersion, or applicator (see 1.2.4 and 6.2). Class 1A material, furnished premixed in liquid
forms III and IV shall be in the concentration required for treatment and shall require no further
dilution. The conversion coating shall not be subjected to a surface temperature greater than
140 °F (60 °C) during drying or curing. After application, the coating shall be continuous and
substantially free from powdery and loose areas. The coating shall also be free from breaks,
scratches, flaws, or other defects that will reduce serviceability or be detrimental to appearance,
protective value, or paint bonding characteristics. The material shall deposit a conversion coating
visibly discernible in daylight.
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