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 2012 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/AMS4248C AEROSPACE MATERIAL SPECIFICATION AMS4248 REV. C Issued 1987-01 Reaffirme
5、d 2000-10 Revised 2012-01 Superseding AMS4248B Aluminum Alloy Hand Forgings and Rolled Rings 1.0Mg - 0.60Si - 0.28Cu - 0.20Cr (6061-T652) Solution Heat Treated, Stress Relief Compressed, and Precipitation Heat Treated (Composition similar to UNS A96061)RATIONALE AMS4248C revises ordering data (8.5)
6、and results from a Five Year Review and update of this specification. 1. SCOPE 1.1 Form This specification covers an aluminum alloy in the form of hand forgings and rolled rings. 1.2 Application These products have been used typically for complex shaped parts requiring moderate strength and good for
7、geability of the alloy and where stability is required during machining, but usage is not limited to such applications. Corrosion resistance of this alloy is superior to that of aluminum alloys having copper as the principal alloying element. 2. APPLICABLE DOCUMENTS The issue of the following docume
8、nts in effect on the date of the purchase order forms a part of this specification 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 h
9、as been specified, the last published issue of that document shall apply. 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. AMS2355 Quality Assurance, Samplin
10、g and Testing, Aluminum Alloys and Magnesium Alloy, Wrought Products (Except Forging Stock), and Rolled, Forged, or Flash Welded Rings AMS2808 Identification, Forgings AMS2772 Heat Treatment of Aluminum Alloy Raw Materials AS1990 Aluminum Alloy Tempers SAE AMS4248C Page 2 of 6 2.2 ASTM Publications
11、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 594 Ultrasonic Inspection of Aluminum-Alloy Products for Aerospace Applications ASTM B 660 Packaging/Packing of Aluminum and Magnesium Products ASTM E 14
12、17 Liquid Penetrant Testing 3. TECHNICAL REQUIREMENTS 3.1 Composition Shall conform to the percentages by weight shown in Table 1, determined in accordance with AMS2355. TABLE 1 - COMPOSITION Element min max Silicon 0.40 0.8 Iron 0.7 Copper 0.15 0.40 Manganese 0.15 Magnesium 0.8 1.2 Chromium 0.04 0.
13、35 Zinc - 0.25 Titanium - 0.15 Other Elements - 0.05 Other Elements - 0.15 Aluminum remainder 3.2 Condition Solution heat treated, stress relieved by compression to produce 1 to 5% permanent set, and precipitation heat treated. Heat treatments shall be performed in accordance with AMS2772 to the T65
14、2 temper (See AS1990). 3.2.1 Forge stock as ordered by the forging manufacturer. 3.3 Properties The product shall conform to the following requirements, determined in accordance with AMS2355 on the mill produced size: 3.3.1 Tensile Properties Shall be as follows: 3.3.1.1 Hand Forgings Specimens, mac
15、hined from forgings having an essentially square or rectangular cross-section heat treated in the indicated thickness, shall have the properties shown in Table 2A or 2B provided the as-forged thickness does not exceed 8 inches (203 mm) and the cross-sectional area is not over 256 square inches (1652
16、 cm2). SAE AMS4248C Page 3 of 6 TABLE 2A - MINIMUM TENSILE PROPERTIES, HAND FORGINGS, INCH/POUNDS UNITS Nominal Thickness at Time of Heat Treatment Inches Specimen Orientation Tensile Strength ksi Yield Strength at 0.2% Offset ksi Elongation in or 4D % Up to 2, incl Longitudinal 38.0 35.0 10 Long.-T
17、rans. 8 Over 2 to 4, incl Longitudinal 38.0 35.0 10 Long.-Trans. 38.0 35.0 8 Short-Trans. 37.0 33.0 5 Over 4 to 8, incl Longitudinal 37.0 34.0 8 Long.-Trans. 6 Short-Trans. 35.0 32.0 4 TABLE 2B - MINIMUM TENSILE PROPERTIES, HAND FORGINGS, SI UNITS Nominal Thickness at Time of Heat Treatment Millimet
18、ers Specimen Orientation Tensile Strength MPa Yield Strength at 0.2% Offset MPa Elongation in or 4D % Up to 51, incl Longitudinal 262 241 10 Long.-Trans. 8 Over 51 to 102, incl Longitudinal 262 241 10 Long.-Trans. 262 241 8 Short-Trans. 255 228 5 Over 102 to 203, incl Longitudinal 255 234 8 Long.-Tr
19、ans. 6 Short-Trans. 241 221 4 3.3.1.2 Rolled Rings Specimens, machined in the indicated orientation from rings 3.5 inches (89 mm) and under in nominal thickness at time of heat treatment and having an OD-to-wall thickness ratio of 10:1 or greater, shall have the properties show in Table 3A or 3B. TA
20、BLE 3A - MINIMUM TENSILE PROPERTIES, INCH/POUND UNITS SAE AMS4248C Page 4 of 6 TABLE 3B - MINIMUM TENSILE PROPERTIES, SI UNITS 3.3.1.3 Special Purpose Forgings Tensile property requirements for specimens cut from special purpose forgings or from forgings or rolled rings beyond the size and configura
21、tion limits of 3.3.1.1 or 3.3.1.2 shall be as specified on the drawing or as agreed upon purchaser and vendor. 3.4 Quality Forgings and rolled rings, as received by purchaser, shall be uniform in quality and condition, sound, and free from foreign materials and from imperfections detrimental to usag
22、e of the forgings and rolled rings. 3.4.1 Forgings and rolled rings shall be subjected to a caustic etch followed by visual examination of the product surfaces for unacceptable discontinuities, such as seams, laps, bursts, and quench cracks. Surface discontinuities which can be removed so that they
23、do not reappear on etching and the required section thickness can be maintained are acceptable. 3.4.2 When specified, all forgings and rolled rings shall be subjected to ultrasonic inspection in accordance with ASTM B 594 and shall meet ultrasonic Class A. 3.4.3 When specified, forgings and rolled r
24、ings shall be subjected to fluorescent penetrant inspection in accordance with ASTM E 1417. Standards for acceptance shall be as agreed upon by purchaser and vendor. 3.5 Tolerances Stock for forgings or rings shall conform to all applicable requirements of ANSI H 35.1 or ANSI H 35.2M and or customer
25、 requirements. SAE AMS4248C Page 5 of 6 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The vendor of the product 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
26、 confirmatory testing deemed necessary to ensure that the product conforms to specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Composition (3.1), tensile properties (3.3.1), visual inspection (3.4.1), tolerances (3.5) and when specified, ultrasonic inspection (3.4.2) and fl
27、uorescent penetrant inspection (3.4.3) are acceptance tests and, except for composition, shall be performed on each lot. 4.3 Sampling and Testing Shall be in accordance with AMS2355. 4.4 Reports 4.4.1 The vendor of forgings or rolled rings shall furnish with each shipment a report stating that the f
28、orgings or rolled rings conform to the composition, and showing the results of tests on each lot to determine conformance to the other technical requirements. This report shall include the purchase order number, lot number, AMS4248C, size or part number, and quantity. The report shall also identify
29、the producer, the mill product form, and the mill produced size. 4.4.2 The vendor of stock for forgings or rings shall furnish with each shipment a report stating that the chemical composition of the stock conforms to specified requirements. This report shall include the purchase order number, lot n
30、umber, AMS4248C, mill produced size, and quantity. The report shall also identify the producer, the mill product form, and the mill produced size. 4.5 Resampling and Retesting Shall be in accordance with AMS2355. 5. PREPARATION FOR DELIVERY 5.1 Identification Shall be in accordance with AMS2808. 5.2
31、 Packaging 5.2.1 The product shall be 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 product to ensure carrier acceptance and safe delivery. 6. ACKNOWLEDGMENT A vend
32、or shall mention this specification number and its revision letter in all quotations and when acknowledging purchase orders. SAE AMS4248C Page 6 of 6 7. REJECTIONS Product not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection. 8. NOTES 8.1 A
33、change bar (l) 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 this document. An (R) symbol to the left of the document title indicates a complete revision of the document, inclu
34、ding technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. 8.2 Hardness Should not be lower than 80 HB/10/500 or 85 HB/10/1000 when determined in accordance with ASTM E 10. 8.3 Terms used in AMS are clarified in ARP1917.
35、 8.4 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 equivalents of the primary units and are presented only for information. 8.5 Purchase orders should specify
36、not less than the following: AMS4248C Size or part number of forgings or rolled rings desired Quantity of forgings or rolled rings desired Acceptance standards for ultrasonic inspection (See 3.4.2) and fluorescent penetrant inspection (See 3.4.3), when specified. 8.6 Similar Specifications AMS-A-22771 (MIL-A-22771), Alloy 6061, Temper T652 for rolled rings, and AMS-QQ-A-367 (QQ-A-367), Alloy 6061, Temper T652, for hand forgings are listed for information only and shall not be construed as acceptable alternates unless all requirements of this AMS are met. PREPARED BY AMS COMMITTEE “D”
