1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there
2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2013 SAE International All rights reserved. No part of this p
3、ublication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-497
4、0 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AMS4278B AEROSPACE MATERIAL SPECIFICATION AMS4278 REV. B Issued 1997-12 Revised 2
5、003-08 Reissued 2003-09 Reaffirmed 2013-12 Superseding AMS4278A Aluminum Alloy, Alclad Sheet 5.6Zn - 2.5Mg - 1.6Cu - 0.23Cr (Alclad 7075-0) Annealed, Fine Grained (Composition similar to UNS A87075) RATIONALE AMS4278B has been reaffirmed to comply with the SAE five-year review policy. 1. SCOPE:1.1 F
6、orm: This specification covers an aluminum alloy in the form of alclad 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 corrosio
7、n, 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 do
8、cuments in effect on the date of the purchase order forms a part of 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 documen
9、t has been specified, the last published issue of that document shall apply.SAE INTERNATIONAL AMS4278B Page 2 of 7 2.1 SAE Publications: Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001 or www.sae.org.AMS 2355 Quality Assurance Sampling and Testing, Aluminum Alloys and Magnesium
10、 Alloys, Wrought Products, Except Forging Stock, and Rolled, Forged, or Flash Welded RingsAMS 2772 Heat Treatment of Aluminum Alloy Raw MaterialsARP823 Minimizing Stress-Corrosion Cracking in Wrought Heat-Treatable Aluminum Alloy ProductsAS1990 Aluminum Alloy Tempers2.2 ASTM Publications: Available
11、from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959 orwww.astm.org.ASTM B 660 Packaging/Packing of Aluminum and Magnesium ProductsASTM B 666/B 666M Identification Marking of Aluminum and Magnesium ProductsASTM E 112 Determining Average Grain Size2.3 ANSI Publications: Available from A
12、NSI, 25 West 43rd Street, New York, NY 10036 or www.ansi.org.ANSI H35.2 Dimensional Tolerances for Aluminum Mill ProductsANSI H35.2M Dimensional Tolerances for Aluminum Mill Products (Metric)3. TECHNICAL REQUIREMENTS: 3.1 Composition: Shall conform to the percentages by weight shown in Tables 1 and
13、2, determined in accordance with AMS 2355.SAE INTERNATIONAL AMS4278B Page 3 of 7 3.2 Condition: Annealed in accordance with AMS 2772.3.3 Properties: Sheet shall conform to the following requirements, determined in accordance with AMS 2355:3.3.1 As Annealed: 3.3.1.1 Average Grain Size of Core: Shall
14、be ASTM No. 6 or finer, determined in accordance with ASTM E 112 or by a technique agreed upon by purchaser and vendor.TABLE 1 - Composition, Core (7075)Element min maxSilicon - 0.40Iron - 0.50Copper 1.2 2.0Manganese - 0.30Magnesium 2.1 2.9Chromium 0.18 0.28Zinc 5.1 6.1Titanium - 0.20Other Elements,
15、 each - 0.05Other Elements, total - 0.15Aluminum remainderTABLE 2 - Composition, Cladding (7072)Element min maxSilicon + Iron - 0.7Copper - 0.10Manganese - 0.10Magnesium - 0.10Zinc 0.8 1.3Other Elements, each - 0.05Other Elements, total - 0.15Aluminum remainderSAE INTERNATIONAL AMS4278B Page 4 of 7
16、3.3.1.2 Tensile Properties: Shall be as shown in Table 3.3.3.1.3 Bending: Sheet shall withstand, without cracking, bending at room temperature through an angle of 180 degrees around a diameter equal to the bend factor shown in Table 4 times the nominal thickness of the sheet with axis of bend parall
17、el to the direction of rolling.3.3.2 Response to Heat Treatment: Sheet shall have the following properties after being solution and precipitation heat treated to the -T62 temper (See AS1990) in accordance with AMS 2772.3.3.2.1 Tensile Properties: Shall be as specified in Table 5.TABLE 3A - Tensile P
18、roperties, Inch/Pound UnitsNominal ThicknessInchTensileStrengthksi, maxYield Strengthat 0.2% Offsetksi, maximumElongation in2 Inches or 4D%, minimumOver 0.039 to 0.062, incl 36.0 20.0 10Over 0.062 to 0.126, incl 38.0 20.0 10TABLE 3B - Tensile Properties, SI UnitsNominal ThicknessMillimetersTensileSt
19、rengthMPa, maxYield Strengthat 0.2% OffsetMPa, maximumElongation in50.8 mm or 4D%, minimumOver 0.99 to 1.57, incl 248 138 10Over 1.57 to 3.20, incl 262 138 10TABLE 4 - Bending ParametersNominal ThicknessInchNominal ThicknessMillimeters Bend Factor0.008 to 0.062, incl 0.20 to 1.57, incl 0Over 0.062 t
20、o 0.126, incl Over 1.57 to 3.20, incl 1TABLE 5A - Minimum Tensile Properties, Inch/Pound UnitsNominal ThicknessInchTensile StrengthksiYield Strengthat 0.2% OffsetksiElongation in2 Inches or 4D%Over 0.039 to 0.062, incl 72.0 62.0 9Over 0.062 to 0.126, incl 74.0 64.0 9SAE INTERNATIONAL AMS4278B Page 5
21、 of 7 3.3.2.2 Bending: Sheet shall withstand, without cracking, bending at room temperature through an angle of 180 degrees around a diameter equal to the bend factor shown in Table 6 times the nominal thickness of the sheet with axis of bend parallel to the direction of rolling.3.3.2.3 Cladding Thi
22、ckness: After rolling, the average cladding thickness shall conform to the requirements shown in Table 7.3.4 Quality: Sheet, as received by purchaser, shall be uniform in quality and condition, sound, and free from foreign materials and from imperfections detrimental to usage of the sheet.3.5 Tolera
23、nces: Shall conform to all applicable requirements of ANSI H35.2 or ANSI H35.2M.TABLE 5B - Minimum Tensile Properties, SI UnitsNominal ThicknessMillimetersTensile StrengthMPaYield Strengthat 0.2% OffsetMPaElongation in50.8 mm or 4D%Over 0.99 to 1.57, incl 496 427 9Over 1.57 to 3.20, incl 510 441 9TA
24、BLE 6 - Bending ParametersNominal ThicknessInchNominal ThicknessMillimetersBendFactor0.008 to 0.020, incl 0.20 to 0.51, incl 6Over 0.020 to 0.062, incl Over 0.51 to 1.57, incl 7Over 0.062 to 0.091, incl Over 1.57 to 2.31, incl 8Over 0.091 to 0.126, incl Over 2.31 to 3.20, incl 9TABLE 7 - Average Cla
25、dding ThicknessNominal ThicknessInchNominal ThicknessMillimetersAverage Cladding Thickness Per Side% of Total Thicknessminimum0.008 to 0.062, incl 0.20 to 1.57, incl 3.2Over 0.062 to 0.126, incl Over 1.57 to 3.20, incl 2.0SAE INTERNATIONAL AMS4278B Page 6 of 7 4. QUALITY ASSURANCE PROVISIONS: 4.1 Re
26、sponsibility for Inspection: The vendor of sheet shall supply all samples for vendors tests and 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 specifi
27、ed requirements.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
28、be performed on each 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 purc
29、haser.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,
30、 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 qua
31、ntity. The report shall also identify the producer, the product form, and the size of the mill product.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
32、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.SAE INTERNATIONAL AMS4278B Page 7 of 7 5.2.2 Sheet shall be prep
33、ared 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 specification number and its re
34、vision 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 (|) located in the left margin is for the convenience of the user in l
35、ocating 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 specification
36、s that contain editorial changes only.8.2 Terms used in AMS are clarified in ARP1917.8.3 Dimensions and properties in inch/pound 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
37、documents should specify not less than the following: AMS 4278BForm and size of product desiredQuantity of product desired.8.5 Similar Specifications: AMS QQ-A-250/13, 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.8.6 Key Words: Aluminum alloy, alclad sheet, annealed, fine grained, 7075-0, UNS A87075PREPARED UNDER THE JURISDICTION OF AMS COMMITTEE “D”
