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/AMS4274A AEROSPACE MATERIAL SPECIFICATION AMS4274 REV. A Issued 1998-01 Revised 2
5、008-01 Reaffirmed 2013-09 Superseding AMS4274Aluminum Alloy, Alclad Sheet 4.4Cu - 1.5Mg - 0.60Mn (Alclad 2024-0) Annealed, Fine Grain (Composition similar to UNS A82024) RATIONALE AMS4274A has been reaffirmed to comply with the SAE five-year review policy. 1. SCOPE 1.1 Form This specification covers
6、 an aluminum alloy in the form of sheet. 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 processi
7、ng procedures may cause these products 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 of this speci
8、fication to the extent specified 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.
9、2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. AMS 2355 Quality Assurance Sampling and Testing, Aluminum Alloys and Magnesium Alloys, Wrought Products, Exc
10、ept Forging Stock, and Rolled, Forged or Flash Welded Rings AMS 2772 Heat Treatment of Aluminum Alloy Wrought Materials ARP823 Minimizing Stress-Corrosion Cracking in Wrought Heat Treatable Aluminum Alloy Products AS 1990 Aluminum Alloy Tempers SAE INTERNATIONAL AMS4274A Page 2 of 6 2.2 ASTM Publica
11、tions Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM B 666/B 666M Identification Marking of Aluminum and Magnesium Products ASTM E 112 Determining Average Grain Size 2.3 ANSI Publications Available from
12、 American National Standards Institute, 25 West 43rd Street, New York, NY 10036, Tel: 212-642-4900, www.ansi.org. ANSI H 35.2 Dimensional Tolerances for Aluminum Mill Products ANSI H 35.2M Dimensional Tolerances for Aluminum Mill Products (Metric) 3. TECHNICAL REQUIREMENTS 3.1 Composition Shall conf
13、orm to the percentages by weight shown in Table 1 and Table 2, determined in accordance with AMS 2355. TABLE 1 - COMPOSITION, CORE (2024) Element min maxSilicon - 0.50Iron - 0.50Copper 3.8 4.9 Manganese 0.30 0.90Magnesium 1.2 1.8 Chromium - 0.10Zinc - 0.25Titanium - 0.15Other Elements, each - 0.05Ot
14、her Elements, total - 0.15Aluminum remainder TABLE 2 - COMPOSITION, CLADDING (1230) Element min maxIron + Silicon - 0.70Copper - 0.10Manganese - 0.05Magnesium - 0.05Zinc - 0.10Vanadium - 0.05Titanium - 0.03Other Elements, each - 0.03Aluminum, by difference 99.30 - 3.2 Condition Annealed in accordanc
15、e with AMS 2772 to 0 Temper. SAE INTERNATIONAL AMS4274A Page 3 of 6 3.3 Properties The 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 Shall be ASTM No. 6 or finer, determined in accordance with ASTM E 112. 3.3.1.
16、2 Tensile Properties Shall be as shown in Table 3. TABLE 3A - TENSILE PROPERTIES, INCH/POUND UNITS Nominal Thickness Inch Tensile Strengthksi, max Yield Strengthat 0.2% Offsetksi, max Elongation in 2 Inches or 4D %, min Over 0.009 to 0.062, incl 30.0 14.0 12 Over 0.062 to 0.126, incl 32.0 14.0 12 TA
17、BLE 3B - TENSILE PROPERTIES, SI UNITS Nominal Thickness Millimeters Tensile Strength MPa, max Yield Strengthat 0.2% OffsetMPa, max Elongation in 50.8 mm or 4D %, min Over 0.23 to 1.57, incl 207 96.5 12 Over 1.57 to 3.20, incl 221 96.5 12 3.3.1.3 Bending Sheet shall withstand, without cracking, bendi
18、ng 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 parallel to the direction of rolling. TABLE 4 - BENDING PARAMETERS Nominal Thickness Inch Nominal Thickness Millimeters Bend F
19、actor Over 0.009 to 0.062, incl Over 0.23 to 1.57, incl 0 Over 0.062 to 0.126, incl Over 1.57 to 3.20, incl 1 3.3.2 Response to Heat Treatment Sheet shall have the following properties after being solution heat treated in accordance with AMS 2772 and aging for not less than 96 hours at room temperat
20、ure to the T42 temper (per AS 1990). 3.3.2.1 Tensile Properties Shall be as shown in Table 5. TABLE 5A - MINIMUM TENSILE PROPERTIES, INCH/POUND UNITS Nominal Thickness Inch Tensile Strengthksi Yield Strengthat 0.2% Offsetksi Elongation in 2 Inches or 4D % Over 0.009 to 0.020, incl 58.0 36.0 15 Over
21、0.020 to 0.062, incl 58.0 36.0 16 Over 0.062 to 0.126, incl 61.0 38.0 16 SAE INTERNATIONAL AMS4274A Page 4 of 6 TABLE 5B - MINIMUM TENSILE PROPERTIES, SI UNITS Nominal Thickness Millimeters Tensile StrengthMPa Yield Strengthat 0.2% OffsetMPa Elongation in 50.8 mm or 4D % Over 0.23 to 0.51, incl 400
22、248 15 Over 0.51 to 1.57, incl 400 248 16 Over 1.57 to 3.20, incl 421 262 16 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
23、axis of bend parallel to the direction of rolling. TABLE 6 - BENDING PARAMETERS Nominal Thickness Inch Nominal Thickness Millimeters Bend Factor Over 0.009 to 0.040, incl Over 0.23 to 1.02, incl 4 Over 0.040 to 0.126, incl Over 1.02 to 3.20, incl 5 3.3.3 Cladding Thickness After rolling, the average
24、 cladding thickness shall conform to the requirements in Table 7. TABLE 7 - MINIMUM AVERAGE CLADDING THICKNESS Nominal Thickness Inch Nominal Thickness Millimeters Cladding Thickness Per Side % of Total Thickness Over 0.009 to 0.062, incl Over 0.23 to 1.57, incl 4.0 Over 0.062 to 0.126, incl Over 1.
25、57 to 3.20, incl 2.0 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 Tolerances Shall conform to all applicable requirements of ANSI H35.2 or ANSI H35.2M. 4. Q
26、UALITY ASSURANCE PROVISIONS 4.1 Responsibility 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 t
27、hat the sheet conforms to specified 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 heat treatment and aging (3.3.2.1), and tolerances (3.5) are acceptance tests and, except
28、 for composition and grain size determination, shall be performed on each lot. SAE INTERNATIONAL AMS4274A Page 5 of 6 4.2.2 Periodic Tests Bending as annealed (3.3.1.3) and after solution heat treatment and aging (3.3.2.2) and cladding thickness (3.3.3) are periodic tests and shall be performed at a
29、 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 grain size shall be determined on one sample from each inspection lot. 4.4 Reports The vendor of sheet shall furnish with each shipment
30、a report stating that the sheet conforms to the composition and showing the numerical results of tests on each inspection lot to determine conformance to the tensile properties, and average grain size. This report shall include the purchase order number, inspection lot number, AMS 4274A, size, and q
31、uantity. 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 Sheet shall be protected, during shipment and storage, by interleaving with paper sheets. 5.2.2 Sheet shall be
32、 prepared for shipment in accordance with commercial practice 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 include this specification num
33、ber 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 locating a
34、reas 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, including technical revision. Change bars and (R) are not used in original publications,
35、 nor in specifications that contain editorial changes only. 8.2 Terms used in AMS are clarified in ARP1917. 8.3 Dimensions and properties in inch/pound units and the Fahrenheit temperatures are primary; dimensions and properties in SI units and the Celsius temperatures are shown as the approximate e
36、quivalents of the primary units and are presented only for information. SAE INTERNATIONAL AMS4274A Page 6 of 6 8.4 Purchase documents should specify not less than the following: AMS 4274A Form and size of product desired Quantity of product desired. 8.5 Similar Specifications Federal QQ-A-250/5, Temper 0, is listed for information only and shall not be construed as an acceptable alternate unless all requirements of this AMS are met. PREPARED BY AMS COMMITTEE “D”
