MIL-DTL-46077G
4.7.2 Dimensions. All plates shall be subject to inspection for compliance with the
dimensional and tolerance requirements (see 3.5).
4.8 Tests (first article and quality conformance).
4.8.1 Chemical composition. Conformance with the chemical composition requirements shall
be determined either by heat or lot analysis using ASTM E539 X-ray emission spectrometric
method for aluminum, vanadium and iron. Oxygen shall be analyzed by the inert gas fusion
technique specified in ASTM E1409. Hydrogen shall be analyzed by the inert gas fusion
thermal conductivity method specified in ASTM E1447 and shall be determined on each lot as
shipped. Carbon and nitrogen shall be determined using ASTM E120. Other analytical
methods may be used with the written approval of the acquiring activity. In case of a dispute,
the results of chemical analysis by the ASTM E120 method shall be used as the basis for
acceptance or rejection.
4.8.2 Mechanical properties. Conformance to the mechanical property requirements shall be
determined by testing at least two specimens (one longitudinal and one transverse) in the
condition ordered from each sample selected in accordance with 4.6.2.2. Tension tests shall be
accomplished in accordance with the following provisions.
4.8.2.1 Tension specimen configuration. The tension specimens shall conform to the
following configuration in accordance with ASTM E8:
a. For product thickness up to 0.375 inch, standard "sheet-type" rectangular cross-
section tension specimens shall be used.
b. For product thickness equal to or greater than 0.375 inch, standard round cross-
section tension specimens with a 0.250 inch diameter minimum reduced test section
shall be used.
4.8.2.2 Tension specimen preparation. Unless the lot consists of only one unit, not more than
one specimen per grain direction per test condition shall be taken from each sample.
Longitudinal specimens shall be prepared in such a manner that the longitudinal axis of the
specimen is parallel to the principal rolling direction of the sample. Transverse specimens
shall be prepared in such a manner that the longitudinal axis of the specimen is perpendicular
to the principal rolling direction and the thickness direction of the sample.
4.8.2.3 Tension test method. Tension tests shall be accomplished in accordance with ASTM
E8, except that the strain rate shall be limited to 0.003 to 0.007 inch/inch per minute for the
measurement of the yield strength: after that it is to be increased so as to produce tensile failure
in approximately one additional minute. In case of dispute, the results of referee tension tests
performed on a tensile machine having a strain pacer and using a strain rate of 0.005 inch/inch
per minute through the yield strength and a minimum crosshead speed of 0.10 inch per minute
when the yield strength has been exceeded shall govern.
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