MIL-DTL-46027K(MR)
TABLE I. Chemical composition, percent. 1/
ALLOYS 2/
5083
5456
5059
ELEMENTS
CLASS 1
CLASS 2
CLASS 3
Silicon
0.40
0.25
0.45
Iron
0.40
0.40
0.50
Copper
0.10
0.10
0.25
Manganese
0.40 - 1.0
0.50 - 1.0
0.6 - 1.2
Magnesium
4.0 4.9
4.7 5.5
5.0 6.0
Chromium
0.05 0.25
0.05 0.20
0.25
Zinc
0.25
0.25
0.40 0.9
Titanium
0.15
0.20
0.20
Other, max. Each
0.05
0.05
0.05
Other, max. Total 3/
0.15
0.15
0.15
Aluminum
Remainder
Remainder
Remainder
1/
Except for "Aluminum" and "others", analysis normally is made for elements for which
specific limits are shown.
2/
Where single units are shown, these indicate the maximum amounts permitted.
3/
The sum of those "others" metallic elements 0.010 percent or more each, expressed to
the second decimal before determining the sum.
3.5 Stress corrosion resistance. When stress corrosion testing is specified in the contract
or purchase order (see 6.2) and unless otherwise specified in the contract or purchase
order (see 6.2), plate 0.750 inch and over in thickness shall be resistant to stress
corrosion cracking, with a minimum of 5 of the 9 specimens showing no evidence of
cracking at the end of 96 hours.
3.6 Thermal processing. After final strain hardening performed during plate fabrication,
any thermal processing exceeding 200°F (93°C) excluding fabrication by welding shall
necessitate recertification for conformance to 3.3, 3.4 and 3.5.
TABLE II. Minimum mechanical properties. 1/ 2/
Yield Strength,
Thickness, inches
Tensile Strength, Ksi
Elongation percent
0.2% Offset, Ksi
5083
5456
5059
5083 5456 5059 5083
5456
5059
0.250 to 0.499, incl.
45.0
45.0
53.0
35.0 35.0 39.0
8
8
8
0.500 to 2.000, incl.
45.0
45.0
52.0
37.0 37.0 39.0
8
8
7
2.001 to 3.000, incl.
44.0
44.0
47.0
35.0 35.0 39.0
9
9
8
1/
See 6.3.
2/
The gage length shall be 1.400 inch for plates having a nominal thickness of 0.500 inch.
4
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