MIL-DTL-46118E(MR)
ASTM G47
- Determining Susceptibility to Stress-Corrosion
Cracking of High Strength Aluminum Alloy Products
(DoD adopted)
(Application for copies should be addressed to the American Society for
Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA
19428-2959).
2.3 Order of precedence. In the event of a conflict between the text of
this document and the references cited herein, the text of this document takes
precedence. Nothing in this document, however, supersedes applicable laws and
regulations unless a specific exemption has been obtained.
3.
REQUIREMENTS
3.1 First article. When specified in the contract or purchase order (see
6.2) and before production has commenced, samples of the specified item shall
be made available to the contracting officer or his authorized representative
for approval in accordance with 4.3.1. The approval of the first article
samples authorizes the commencement of production but does not relieve the
supplier of responsibility for compliance with all applicable provisions of
this specification. The first article samples and test forgings shall be
manufactured by the process proposed for use on production.
3.2 Chemical composition. Chemical composition of material furnished
under this specification shall be within the limits specified in table I.
1/
TABLE I.
Chemical composition, percent (ladle analysis).
Element
Min.
Max.
Silicon
-
0.20
Iron
-
0.30
Copper
5.8
6.8
Manganese
0.20
0.40
Magnesium
-
0.02
Zinc
-
0.10
Titanium
0.02
0.10
Zirconium
0.10
0.25
Vanadium
0.05
0.15
Others, each
-
0.05
Others, total
-
0.15
Aluminum, by difference
Remainder
_____________________________________________________________
1/
See 6.5
3.3 Mechanical properties. Unless otherwise specified in the contract or
order (see 6.2), the mechanical properties of rolled plate and forged shapes
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, the ballistic requirements shall be as agreed
upon between the procuring activity and the manufacturer.
3
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