MIL-DTL-46063H
3.2 Chemical composition. Chemical composition shall be within the limits
shown in table I. A certification of the chemical composition of the alloy
shall be furnished with the ballistic test plates (see 6.2).
TABLE I.
Chemical composition.
Element
Percent
Zinc
3.5 - 4.5
Magnesium
2.3 - 3.3
Manganese
0.10 - 0.40
Copper
.10 max
Iron
.40 max
Silicon
.30 max
Chromium
.15 - 0.25
Titanium
.10 max
Others, each
.05 max
Others, total
.15 max
Aluminum (by difference)
Remainder
3.3 Mechanical properties. Unless otherwise specified in the contract or
order (see 6.2), the mechanical properties of the test specimen taken in the
long-transverse direction shall meet the requirements of table II when tested as
specified in 4.7.2. If mechanical properties differ from the values shown in
table II, or if any other properties are required and if the difference in
properties are negotiated between the procuring activity and the supplier, the
minimum acceptable ballistic requirements of appendix A will apply.
TABLE II.
Mechanical properties.
Yield
Elongation
Tensile
strength
min,
strength
0.2% offset,
percent in
Thickness, inch
min, psi
min, psi
2 in.
Up to 1.500, incl
60,000
51,000
9
Over 1.500
57,000
48,000
8
3.4 Stress corrosion resistance. Unless otherwise specified in the
contract or order (see 6.2), plate material 0.72 inch and thicker in the short
transverse direction shall be resistant to stress corrosion cracking. A minimum
of 5 of the 9 specimens tested shall show no evidence of cracking at the end of
96 hours when tested as specified in 4.7.3 (see 6.4).
3.5 Heat treatment. Heat treatment shall be such as to meet the
requirements of this specification (see 6.5).
3.6 Ballistic limit.
The protection ballistic limit, BL(P), shall be as
specified in appendix A.
3
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