MIL-DTL-12235A (MR)
3.1.1.4.2 Application. Rotating bands shall be applied cold and in the fully annealed condition.
The band shall be in the form of a solid ring, carefully pressed into the band seat so as to fill it
completely and to fit it tightly. The application shall be in such a manner as not to distort the
body of the projectile (see 4.4.1).
3.1.1.4.3 Protection. The machined rotating band shall not be nicked, burred, or otherwise
damaged.
3.1.1.4.4 Clearance. After seating of the rotating band, the clearance between band and band
seat shall not exceed 0.006 inches.
3.1.1.5 Cleaning prior to painting. The projectile surface to be painted shall be cleaned by one of
the methods specified in TT-C-490 unless otherwise specified in the contract or purchase order
(see 6.2). After cleaning, the surfaces shall not be re-contaminated prior to painting and after
painting shall meet the requirements specified in the contract or purchase order (see 6.2)
3.1.2 Aluminum proofing -projectiles. All aluminum proofing-projectiles shall be made from
aluminum alloy 1100 Temper 0 in accordance with Table III.
3.1.2.1 Processing and composition.
3.1.2.1.1 Processing. The composition and heat treatment, when required, shall be at the option
of the contractor and shall be specified in the contract or purchase order (see 6.2).
3.1.2.1.2 Statement of analysis. The chemical analysis of aluminum shall be furnished with
each lot of projectiles supplied.
3.1.2.2 Aluminum quality. The quality of the aluminum used in projectiles shall be as indicated
in the contract or purchase order (see 6.2).
3.1.2.3 Mechanical properties. Unless otherwise specified in the contract or order (see 6.2 and
6.3), the mechanical properties of the test specimen taken in the longitudinal direction shall meet
the minimum mechanical properties listed in Table IV.
TABLE IV. Minimum mechanical properties.
Yield Strength,
Elongation percent
Tensile Strength, Ksi
0.2% Offset, Ksi
13.0
5.00
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4. VERIFICATION
4.1 Classification of inspections. The inspection requirements specified herein are classified as
conformance inspection (see 4.2).
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