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MIL-A-12560H (MR)
w/INT. AMENDMENT 4
3.2.10.4.1.3 Cracks. All cracks shall be rejectable.
3.2.10.4.1.4 Removal of large indications. Large indications shall be removed by the
manufacturer or processor by grinding, provided the resulting cavity does not exceed 1/4 inch.
4. VERIFICATION
4.1 Responsibility for inspection. DELETED.
4.1.1 Responsibility for compliance. DELETED.
4.1 Classification of inspection. The inspection requirements specified herein are classified as
follows:
a. First article inspection (see 4.1.1).
b. Conformance inspection (see 4.2).
4.1.1 First article inspection. When required (see 6.2), the first article samples submitted in
accordance with 3.1, shall be examined for all the provisions of this specification applicable to
end item examination.
4.1.2 First article tests. First article tests (see 6.2) shall consist of all the tests specified in 4.6.
4.1.3 First article ballistic test. Unless otherwise specified (see 3.1, 6.2, and 6.11), the first article
ballistic test shall not be required provided (a) the manufacturer, within 37 months, has produced
acceptable plates within the same nominal thickness ranges of table IX, and (b) the production
conditions are the same as for previously accepted plates. A supplier who has previously met the
first article requirements shall furnish the procuring activity the firing record of the ballistic test
plate and other pertinent data relative to compliance with first article. Neither first article nor
acceptance ballistic tests shall be required for plates ordered to thicknesses of more than 6.25
inches. Acceptance of these thicker plates shall be based on meeting the other requirements of
the specification.
4.2 Conformance inspection. The acceptance examination under 4.5 and the tests under 4.6 shall
serve as a basis for the acceptance of individual production lots.
4.3 Lot. A lot shall consist of all production and ballistic test plates of the same melt of steel, of
the same thickness, having the same treatment, and heat treated with the same thermal cycle in
the same production furnace(s) in the same facility. When specified by the procuring activity
(see 4.3.1), production and ballistic test plates shall be allowed to be heat treated separately. The
test plate shall be heat treated in a production furnace.
4.3.1 Separately heat treated ballistic test plate. When the procuring activity allows a ballistic test
plate to be heat treated separately from the production plates it represents (see 6.2), it shall be so
stated in the data (see 6.7).
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