SAE AMS 4278B pdf download

SAE AMS 4278B pdf download.Aluminum Alloy, Alclad Sheet 5.6Zn – 2.5Mg – 1.6Cu- 0.23Cr (Alclad 7075-0) Annealed, Fine Grained.
1.1 Form:
This specification covers an aluminum alloy in the form of alciad sheet with a fine.-grain core of ASTM No. 6 or finer.
1.2 Application:
This sheet has been used typically for severely formed structural parts which will be subsequently heat treated and painted or otherwise protected from corrosion, but usage is not limited to such applications.
1.2.1 Certain design and processing procedures may cause this sheet to become susceptible to stress-corrosion cracking after heat treatment; ARP823 recommends practices to minimize such conditions,
2. APPLICABLE DOCUMENTS:
The issue of the following documents in effect on the date of the purchase order forms a part 01 this specification to the extent supplied herein. The supplier may work to a subsequent revision of a document unless a specific document issue is specified. When the referenced document has been cancelled and no superseding document has been specified, the last published issue of that document shall apply.
4. QUAlITY ASSURANCE PROVISIONS:
4.1 Responsibility for Inspection:
The vendor of sheet shall supply all samples for vendor’s tests arid shall be responsible for the performance of all required tests. Purchaser reserves the right to sample and to perform any confirmatory testing deemed necessary to ensure that the sheet conforms to specified requirenients
4.2 Classification of Tests:
4.2.1 Acceptance Tests: Composition (3.1), average grain size (3.3.1.1), tensile properties as annealed (3.3.1.2), and after solution and precipitation heat treatment (3.3.2.1), and tolerances (3.5) are acceptance tests and, except for composition, shall be performed on ead lot.
4.2.2 Periodic Tests: Bending as annealed (3.3.1.3) and after solution and precipitation heat treatment (3.3.2.2) and cladding thickness (3.3.2.3) are periodic tests and shall be performed at a frequency selected by the vendor unless frequency of testing is specified by purchaser.
4.3 Sampling and Testing:
Shall be in accordance with AMS 2355 except that average grain size shall be determined on one sample from each Inspection lot.
4.4 Reports:
The vendor of sheet shall furnish with each shipment a report stating that the sheet conforms to the composition and tolerances, showing the numerical results of tests on each inspection lot to determine conformance to other acceptance test requirements, and stating that the sheet conforms to the other technical requirements. This report shall include the purchase order number, inspection lot number, AMS 4278B, size, and quantity. The report shall also identify the producer, the product form, and the size of the mill pi’oduct.
4.5 Resampling and Retesting:
Shall be In accordance with AMS 2355.
5. PREPARATION FOR DELIVERY:
5.1 Identification:
Shall be in accordance with ASTM B 666/B 666M,
5.2 Packaging:
5.2.1 Product shall be protected from damage during storage and shipment by a method determined by vendor unless specified by purchaser. Examples of typical protective methods include but are not limited to interleaving with paper or oiling of the surface.
5.2.2 Sheet shall be prepared for shipment in accordance with ASTM B 660 and in compliance with applicable rules and regulations pertaining to the handling, packaging, and transportation of the sheet to ensure carrier acceptance and safe delivery.
6. ACKNOWLEDGMENT:
A vendor shall mention this specdication number and its revision letter in all quotations and when acknowledging purchase orders.
7. REJECTIONS:
Sheet not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection.
8. NOTES:
8.1 A change bar (I) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous issue of a specification. An (R) symbol to the left of the document title indicates a complete revision of the specification. Change bars and (R) are not used in original publications, nor In specifications that contain editorial changes only.
8.2 Terms used in AMS are clarified in ARP1917.
8.3 Dimensions and properties in inchipound units are primary; dimensions and properties in SI units are shown as the approximate equivalents of the primary units and are presented only for information.
8.4 Purchase documents should specify not less than the following:
AMS 42788
Form and size of product desired
Quantity of product desired.
8,5 Similar Specifications:
AMS QO-A-250113. Temper 0, and ASTM B 209 are listed for information only and shall not be construed as acceptable alternates unless all requirements of this AMS are met.