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 reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2011 SAE International All rights reserved. No part of this publication m
3、ay 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: +1 724-776-4970 (outside U
4、SA) 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/AMS4335 AEROSPACE MATERIAL SPECIFICATION AMS 4335 Issued 2001-10 Reaffirmed 2011-08 Forgings,
5、 Aluminum Alloys 2xxx and 7xxx, Heat-Treated, Finished-Part Properties: Short-Transverse Tensile Properties and Fracture Toughness 1. SCOPE:1.1 Form: This specification establishes requirements for 2xxx-series and 7xxx-series aluminum alloy forgings of any shape or form from which finished parts are
6、 to be made. (See 8.2, 8.3, 8.4, 8.5.4, 8.6 and 8.8.)1.2 Application: These forgings are used typically in the manufacture of high-performance parts when control of short-transverse tensile properties and fracture toughness is required, but usage is not limited to such applications.1.2.1 These forgi
7、ngs are to be manufactured in accordance with a documented process. Product approval is based on first-article demonstrations of microstructural properties and of mechanical properties in the heat-treat condition and section size of the finished part.1.2.2 Certain design and processing procedures ma
8、y cause these products to become susceptible to stress-corrosion cracking after heat treatment. ARP823 recommends practices to minimize such conditions.1.3 Classification: Forgings shall be one of the following Types defined below and in Table 1, as specified in the ordering data. (See 8.4.) When no
9、 Type is specified, Type 2 shall be supplied.1.3.1 Type 1: For maximum acceptance testing and product uniformity. All requirements are preproduction tests, all requirements excepting grain flow are acceptance tests, and all of the forgings in a lot must be from the same lot of forging stock. (See 8.
10、5.3.1.)1.3.2 Type 2: For maximum acceptance testing without maximum product uniformity. All requirements are preproduction tests, all requirements excepting grain flow are acceptance tests, and the forgings in a lot may be from different lots of forging stock. (See 8.5.3.2.)Copyright SAE Internation
11、al Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS 4335 Page 2 of 20 TABLE 1 - Classification of Forgings1.3.3 Type 3: For economic advantage so long as the forging manufacturer has a firmly-entrenched, fairly sophistic
12、ated quality system. All requirements are preproduction tests, tensile and fracture toughness tests are periodic tests (8.7), all other requirements excepting grain flow are acceptance tests, and the forgings in a lot may be from the different lots of forging stock. (See 8.5.3.2.)2. APPLICABLE DOCUM
13、ENTS: The issue of the following documents 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
14、canceled and no superseding document has been specified, the last published issue of that document shall apply.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS 4335 Page 3 of 20 2.1 SAE Public
15、ations: Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.AMS 2375 Control of Forgings Requiring First Article ApprovalAMS 2772 Heat Treatment of Aluminum Alloy Raw MaterialsARP823 Minimizing Stress-Corrosion in Wrought Heat-Treatable Aluminum Alloy Products2.2 ASTM Publications:
16、 Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.ASTM B 666/B 666M Identification Marking of Aluminum and Magnesium ProductsASTM B 557 Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy ProductsASTM B 557M Tension Testing Wrought and Cast Aluminum- and Magnes
17、ium-Alloy Products (Metric)ASTM B 594 Ultrasonic Inspection of Aluminum-Alloy Wrought Products for Aerospace ApplicationsASTM B 645 Plane-Strain Fracture Toughness Testing of Aluminum AlloysASTM B 646 Fracture Toughness Testing of Aluminum AlloysASTM E 10 Brinell Hardness of Metallic MaterialsASTM E
18、 399 Plane-Strain Fracture Toughness of Metallic MaterialsASTM E 407 Microetching Metals and AlloysASTM E 561 R-Curve DeterminationASTM E 1304 Plane-Strain (Chevron-Notch) Fracture Toughness of Metallic MaterialsASTM E 1417 Liquid Penetrant Examination3. TECHNICAL REQUIREMENTS: 3.1 Material: Forging
19、s shall be produced from forging stock specified by the purchaser. (See 8.4.)3.2 Condition: 3.2.1 Physical: Forgings shall not be welded, and shall be supplied etched with all test-material prolongations not consumed in pre-delivery testing, in place. (See 8.5.2.)3.2.2 As-supplied Heat-treat Conditi
20、on: Forgings shall be supplied in the “-O1” temper.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS 4335 Page 4 of 20 3.3 Properties: 3.3.1 Response to Heat Treatment: Tensile and fracture-tou
21、ghness properties shall conform to the response-to-heat-treatment requirements specified by the purchaser. (See 8.2.) Room-temperature tensile requirements (3.3.1.1) shall be applicable always; fracture toughness requirements (3.3.1.2) shall be applicable only when so specified by the purchaser. (Se
22、e 8.2.) Test specimens for tensile testing and for fracture-toughness testing shall be manufactured from a test-material source in accordance with 4.3.5.3.3.1.1 Room-Temperature Tensile: Room-temperature tensile properties shall be determined in accordance with ASTM B 557 (or ASTM B 557M). The short
23、-transverse test direction shall be applicable when S final HT 1 1/2 inches (38.1 mm); see Figure 1 for definition of S final HT. The longitudinal test direction shall be applicable when S final HT 1 1/2 inches (38.1 mm). (See 8.5.1.)3.3.1.2 Room-Temperature Fracture Toughness: Fracture toughness sh
24、all be determined in accordance with ASTM E 399 or ASTM E 1304 as augmented by ASTM B 645, B 646, and E 561. Fracture toughness may be determined either in accordance with ASTM E 399 using compact specimens or in accordance with ASTM E 1304 using short-rod or short-bar specimens provided that the re
25、quired value of fracture-toughness is for the test method used. (See 8.2.) Crack plane orientation as defined in ASTM E 399, shall be “R-L” for round bars and hollow cylinders, “L-R” for upset discs, and as specified on the engineering drawing for all other shapes.3.3.2 Hardness: Hardness, determine
26、d in accordance with ASTM E 10, shall be that which is characteristic of the as-supplied heat-treat condition (3.2.2). The hardness values shall conform to the requirements of Table 2 when the forgings are supplied in the “-O1” temper, and shall conform to the requirements in the material specificat
27、ion for the alloy when in a “-TX” temper.TABLE 2 - Hardness Requirements for the -O1 TemperApplicable toAluminumAlloy Type Maximum Hardness2xxx 74 HB 10/5007xxx 80 HB 10/500Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without
28、 license from IHS-,-,-SAE AMS 4335 Page 5 of 20 FIGURE 1 - Definition of S final HTCopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS 4335 Page 6 of 20 3.3.3 Grain Flow: The internal grain-flow
29、pattern shall conform to the requirements of the forging drawing. When not specified by the drawing, grain flow of die forgings in regions within 0.25 inch (6.4 mm) or 25% of the section thickness, whichever is smaller, of the forged surface shall follow the general contour of the forging; this requ
30、irement shall not apply to areas of prolongation attachment or of flash extrusion (“flash line” or “parting plane”). (See 8.2 and 8.5.) Unless locations are specified by the purchaser, the forging manufacturer shall select suitable locations for sectioning sufficient to fully document compliance wit
31、h these requirements; as a minimum, cross-sections shall be taken normal to all die-closures. (See 8.2.) A different alloy with similar forging characteristics may be used as a test medium when the grain flow pattern of the specified aluminum alloy (3.1) is too faintly revealed to record photographi
32、cally. Sections shall be finished and etched in accordance with ASTM E 407 to reveal the grain flow pattern, or in accordance with any other procedure which reveals the grain-flow pattern. The grain-flow pattern shall be recorded photographically for reporting purposes (4.5). 3.4 Quality: 3.4.1 Surf
33、ace Condition: Forgings shall be free of visually-verified tears, cracks, seams, laps, and imbedded foreign material. Surfaces shall be inspected in accordance with ASTM E 1417; the nature of any indication shall be established by visual examination. Imperfections may be removed, in which case surfa
34、ces shall be reinspected.3.4.2 Internal Condition: This requirement is applicable only when so specified by the purchaser. Internal condition shall conform to the requirements specified by the purchaser. (See 8.2.) Evaluation of internal condition shall be performed in accordance with ASTM B 594 and
35、 the inspection class specified by the purchaser.3.4.3 Forging Control: The forging process shall be in accordance with a documented process which has met approval requirements (4.4).3.4.4 Heat Treating Control: Forgings shall be heat treated in accordance with AMS 2772 or, for alloys not listed in
36、AMS 2772, in accordance with instructions from the purchaser. (See 8.2.)3.5 Tolerances: Flash extension, measured from the body of the forging to the trimmed edge of the flash, shall not exceed the dimensional limits in Table 3.Copyright SAE International Provided by IHS under license with SAENot fo
37、r ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS 4335 Page 7 of 20 4. QUALITY ASSURANCE PROVISIONS: 4.1 Responsibility for Inspection: The supplier shall be responsible for the performance of all tests. The purchaser reserves the right to sample and perform any co
38、nfirmatory testing deemed necessary to ensure that the forgings conform to specified requirements.4.2 Classification of Tests: 4.2.1 Acceptance Tests: Acceptance test requirements are shown in Table 1. Acceptance tests shall be performed on each lot. See 8.5.3 for the definition of a lot.4.2.2 Perio
39、dic Tests: Periodic test requirements are applicable only to Type 3 and are shown in Table 1. Periodic tests shall be performed at a frequency selected by the supplier unless frequency of testing is specified by purchaser. (See 8.7.)4.2.3 Preproduction Tests: All technical requirements are preproduc
40、tion tests and shall be performed for first article approval and after any significant changes in the method of manufacture of the product.TABLE 3 - Flash Extension TolerancesWeight of ForgingAfter Trimmingin pounds(kilograms)Flash ExtensionLimitsin inches(millimeters)5 and under(2.3 and under)0 to
41、0.03(0 to 0.8)Over 5 to 25, incl(Over 2.3 to 11.3, incl)0 to 0.06(0 to 1.5)Over 25 to 50, incl(Over 11.3 to 22.7, incl)0 to 0.09(0 to 2.3)Over 50 to 100, incl(Over 22.7 to 45, incl)0 to 0.13(0 to 3.3)Over 100 to 200, incl(Over 45 to 91, incl)0 to 0.19(0 to 4.8)Over 200 to 500, incl(Over 91 to 227, i
42、ncl)0 to 0.25(0 to 6.4)Over 500 to 1000, incl(Over 227 to 454, incl)0 to 0.31(0 to 7.9)Over 1000(Over 454)0 to 0.38(0 to 9.6)Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS 4335 Page 8 of 20
43、4.3 Sampling and Testing: NOTE: In paragraphs 4.3.1, 4.3.2, and 4.3.3 the term “forging” shall denote either the forged shape or an associated prolongation or separately-forged coupon, as is applicable.4.3.1 Acceptance: Each of the following inspections shall be performed on each lot of forgings. Se
44、e 8.5.3 for the definition of a lot.4.3.1.1 Room-Temperature Tensile: For Types 1 and 2 only, one or more forgings shall be tested for room-temperature tensile properties.4.3.1.2 Fracture Toughness: For Types 1 and 2 only (when specified), one or more forgings shall be tested for room-temperature fr
45、acture toughness properties.4.3.1.3 Hardness: For forgings supplied in the “-O1” temper, each forging of the sample required by Table 4 shall be tested for hardness. Each forging supplied in a “-TX” temper shall be tested for hardness.4.3.1.4 Surface Condition: Each forging shall be inspected for su
46、rface condition.4.3.1.5 Internal Condition: Each forging shall be inspected for internal condition, when applicable.4.3.1.6 Monitoring of Processes and Materials and Inspection of Tolerances: The suppliers quality assurance function shall determine the frequency for monitoring processes and material
47、s, and for inspection of tolerances.4.3.2 Periodic: Forgings for periodic tests shall be selected randomly from a forging lot for which compliance with all acceptance requirements has been verified. The number of forgings in the sample shall be sufficient to provide the material needed for verificat
48、ion of the applicable properties.4.3.3 Preproduction: The following inspections shall be performed. The number of forgings shall be sufficient to provide the material needed for verification of applicable properties and the number of determinations required below.TABLE 4 - Acceptance Sampling Plan for Hardness of -O1 TemperLot Size(Number of forgings)Sample Size(Number of forgings from lot, minimum)1 to 4 All5 to 25 526 to 100 6101 and over 7Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or
