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 theref
2、rom, 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 2012 SAE InternationalAll rights reserved. No part of this publication may b
3、e 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 USA)Fax
4、: 724-776-0790Email: CustomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedbackon this Technical Report, please visithttp:/www.sae.org/technical/standards/AMS4456AEROSPACEMATERIALSPECIFICATIONAMS4456Issued 2012-05Aluminum Alloy, Hand Forgings8.0Zn - 1.0Cu - 1.
5、6Mg - 0.12Zr (7037-T7452)Solution Heat Treated, Compression Stress-Relieved, and Overaged(Composition similar to UNS A97037)RATIONALEAMS4456 is a new specification for hand forgings in aluminum alloy 7037-T7452.1. SCOPE1.1 FormThis specification covers an aluminum alloy in the form of hand forgings
6、11 inches (280 mm) and under in nominal thickness, and of forging stock.1.2 ApplicationThese forgings have been used typically for machined structural parts subject to warpage during machining and requiring high strength and resistance to stress-corrosion cracking, but usage is not limited to such a
7、pplications.2. APPLICABLE DOCUMENTSThe 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
8、referenced document has been cancelled and no superseding document has been specified, the last published issue of that document shall apply.2.1 SAE PublicationsAvailable from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4
9、970 (outside USA), www.sae.org.AMS2355 Quality Assurance, Sampling and Testing, Aluminum Alloys and Magnesium Alloys, Wrought Products(Except Forging Stock), and Rolled, Forged, or Flash Welded RingsAMS2808 Identification, ForgingsAMS2772 Heat Treatment of Aluminum Alloy Raw MaterialsAS1990 Aluminum
10、 Alloy TempersSAE AMS4456 Page 2 of 72.2 ASTM PublicationsAvailable 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 Wrought Products for Aerospace ApplicationsASTM B 64
11、5 Plane Strain Fracture Toughness Testing of Aluminum AlloysASTM B 660 Packaging/Packing of Aluminum and Magnesium ProductsASTM E 399 Plane-Strain Fracture Toughness of Metallic MaterialsASTM G 34 Exfoliation Corrosion Susceptibility in 2XXX and 7XXX Series Aluminum Alloys (EXCO Test)ASTM G 47 Deter
12、mining Susceptibility to Stress Corrosion Cracking of 2XXX and 7XXX Aluminum Alloys2.3 ANSI PublicationsAvailable from American National Standards Institute, 25 West 43rdStreet, New York, NY 10036-8002, Tel: 212-642-4900,www.ansi.org.ANSI H35.2 Dimensional Tolerances for Aluminum Mill ProductsANSI H
13、35.2M Dimensional Tolerances for Aluminum Mill Products (Metric)3. TECHNICAL REQUIREMENTS3.1 CompositionShall conform to the percentages by weight shown in Table 1, determined in accordance with AMS2355.TABLE 1 - COMPOSITIONElement Min maxSilicon - 0.10Iron - 0.10Copper 0.6 1.1Manganese - 0.50Magnes
14、ium 1.3 2.1Chromium - 0.04Zinc 7.8 9.0Titanium - 0.10Zirconium 0.06 0.25Other Elements, each - 0.05Other Elements, total - 0.15Aluminum Remainder3.2 ConditionThe product shall be supplied in the following condition:3.2.1 ForgingsHeat treatment shall be in accordance with AMS2772 to the T7452 temper
15、(See AS1990) and as follows: Solution heat treatment and artificial aging practices are proprietary. Material shall be stress-relieved by compressing to produce a 1 to 5 percent permanent set prior to artificial aging.SAE AMS4456 Page 3 of 73.2.2 Forging StockAs ordered by the forging manufacturer.3
16、.3 PropertiesThe product shall conform to the following requirements, determined in accordance with AMS2355.3.3.1 Forgings3.3.1.1 Tensile PropertiesSpecimens machined from forgings having essentially a rectangular or square cross-section, heat treated in the indicated thickness, shall have the prope
17、rties shown in Table 2 provided that the as-forged thickness does not exceed 11.00 inches (280 mm). The long-transverse direction for square forgings shall be identified by the vendor.TABLE 2A - MINIMUM TENSILE PROPERTIES, INCH/POUND UNITSNominal Thicknessat Timeof Heat TreatmentInchesSpecimenOrient
18、ationTensileStrengthksiYield Strengthat 0.2% OffsetksiElongationin 4D%Up to 4.000, incl Longitudinal 71 64 10Long-Trans. 72 64 10Short-Trans. 72 60 6Over 4.000 to 6.000, incl Longitudinal 71 64 10Long-Trans. 71 64 6Short-Trans. 71 58 6Over 6.000 to 8.000, incl Longitudinal 70 63 10Long-Trans. 70 62
19、4Short-Trans. 69 57 6Over 8.000 to 11.000, incl Longitudinal 67 59 8Long-Trans. 67 58 4Short-Trans. 66 54 6TABLE 2B - MINIMUM TENSILE PROPERTIES, SI UNITSNominal ThicknessAt TimeOf Heat TreatmentMillimetersSpecimenOrientationTensileStrengthMPaYield Strengthat 0.2% OffsetMPaElongationin 5D%Up to 100,
20、 incl Longitudinal 490 442 9Long-Trans. 497 442 9Short-Trans. 497 414 5Over 100 to 152, incl Longitudinal 490 442 9Long-Trans. 490 442 6Short-Trans. 490 400 5Over 152 to 203, incl Longitudinal 483 435 9Long-Trans. 483 428 4Short-Trans. 476 393 5Over 203 to 280, incl Longitudinal 462 407 7Long-Trans.
21、 462 400 4Short-Trans. 455 373 4SAE AMS4456 Page 4 of 73.3.1.1.1 Tensile specimens shall be excised from the T/2 and W/2 location at a distance not less than T from the “as heat-treated” edges of the forging.3.3.1.2 Corrosion ResistanceResistance to stress-corrosion cracking and to exfoliation-corro
22、sion is acceptable if the requirements of 3.3.1.2.1 and 3.3.1.2.2 are met.3.3.1.2.1 Electrical ConductivityShall be not lower than 34.8 percent IACS (International Annealed Copper Standard) (20.2 MS/m).3.3.1.2.2 Forgings with electrical conductivity measured to be 34.8 to 36.0% IACS on tensile bar b
23、lanks at T/2 shall have SCC testing performed per 3.3.1.4 in order to verify acceptable SCC resistance. This provision is being added into the governing specification until enough data is acquired to assure that electrical conductivities within the range of 34.8 to 35.3% IACS can satisfy the require
24、ments of 3.3.1.4.3.3.1.2.3 Forgings not conforming to 3.3.1.2.1 may be given additional overaging and retested to determine conformance to 3.3.1.1, 3.3.1.2.1, and 3.3.1.2.2. Forgings with electrical conductivity greater than 36.0% IACS are acceptable without SCC testing for lot acceptance.3.3.1.3 Ex
25、foliation-Corrosion ResistanceSpecimens cut from forgings at any plane shall show a level of exfoliation-corrosion less than that illustrated by Photograph EB, Figure 2, of ASTM G 34.3.3.1.4 Stress-Corrosion ResistanceSpecimens as in 4.3.1 cut from forgings shall show no evidence of stress-corrosion
26、 cracking when stressed in the short-transverse direction at 35.0 ksi (241 MPa) when tested in accordance with ASTM G 47.3.3.1.5 Fracture ToughnessWhen specified, forgings shall meet the values of KICshown in Table 3, determined in accordance with ASTM B 645.TABLE 3A - FRACTURE TOUGHNESS PARAMETERS,
27、 INCH/POUND UNITSSpecimenOrientationNominalThicknessInchesMinimum KICksi inchL-T Up to 4.000, incl 30Over 4.000 to 6.000, incl 30Over 6.000 to 8.000, incl 30Over 8.000 to 11.000, incl 30T-L Up to 4.000, incl 29Over 4.000 to 6.000, incl 23Over 6.000 to 8.000, incl 21Over 8.000 to 11.000, incl 19S-L U
28、p to 4.000, incl 21Over 4.000 to 6.000, incl 21Over 6.000 to 8.000, incl 21Over 8.000 to 11.000, incl 21SAE AMS4456 Page 5 of 7TABLE 3B - FRACTURE TOUGHNESS PARAMETERS, SI UNITSSpecimenOrientationNominalThicknessMillimetersMinimum KICMPa mL-T Up to 100, incl 33Over 100 to 152, incl 33Over 152 to 203
29、 incl 33Over 203 to 280, incl 33T-L Up to 100, incl 32Over 100 to 152, incl 26Over 152 to 203 incl 23Over 203 to 280, incl 21S-L Up to 100, incl 23Over 100 to 152, incl 23Over 152 to 203 incl 23Over 203 to 280, incl 233.3.1.5.1 KQvalues shall meet all requirements of ASTM E 399 for KICexcept that in
30、valid KQvalues which are meaningful as defined by ASTM B 645 and which equal or exceed the KIClimit (3.3.1.6) shall be evidence of acceptable fracture toughness.3.3.2 Forging StockWhen a sample of stock is forged to a test coupon having a degree of mechanical working not greater than the forging and
31、 heat treated as in 3.2.1, specimens taken from the heat treated coupon shall conform to the requirements of 3.3.1.1. If specimens taken from the stock after heat treatment as in 3.2.1 conform to the requirements of 3.3.1.1, the tests shall be accepted as equivalent to tests of a forged coupon.3.4 Q
32、ualityThe product, 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 product.3.4.1 When specified, forgings shall be subjected to ultrasonic inspection in accordance with ASTM B 594 and shall
33、 meet the following requirements:3.4.1.1 Forgings with nominal section thicknesses from 2.500 to 11.000 inches (60.00 to 280.00 mm), inclusive, and weights of each piece up to 600 pounds (272 kg) shall meet ultrasonic Class A.3.5 TolerancesForging stock shall conform to all applicable requirements o
34、f ANSI H35.2 or ANSI H35.2M.4. QUALITY ASSURANCE PROVISIONS4.1 Responsibility for InspectionThe 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 confirmatory
35、testing deemed necessary to ensure that the product conforms to specified requirements.SAE AMS4456 Page 6 of 74.2 Classification of Tests4.2.1 Acceptance TestsThe following requirements are acceptance tests and, except for composition, shall be performed on each inspection lot as applicable:4.2.1.1
36、Composition (3.1).4.2.1.2 Tensile properties (3.3.1.1), corrosion resistance (3.3.1.2), and, when specified, fracture toughness (3.3.1.5) and ultrasonic soundness (3.4.1) of each inspection lot of forgings.4.2.1.3 Tolerances (3.5) of forging stock.4.2.2 Periodic TestsExfoliation-corrosion resistance
37、 (3.3.1.3), and stress-corrosion resistance (3.3.1.4) and tests of forging stock to demonstrate ability to develop required properties (3.3.2) are periodic tests and shall be performed at a frequency selectedby the vendor unless frequency of testing is specified by purchaser.4.3 Sampling and Testing
38、Shall be in accordance with AMS2355 and the following; a lot shall be not more than 6000 pounds (2721 kg) of forgings of the same configuration or part number heat treated in the same batch-furnace load or charged into a continuous furnace consecutively during an 8-hour period.4.3.1 Stress-Corrosion
39、 ResistanceSamples, taken from a forging or a forging prolongation, shall be not less than 0.750 inch (19.05 mm) in thickness.4.3.2 For Ultrasonic Inspection, When RequiredEach forging.4.4 Reports4.4.1 The vendor of forgings shall furnish with each shipment a report stating that the composition conf
40、orms to specifiedrequirements and showing the results of tests on each inspection lot to determine conformance to the other acceptance test requirements and, when performed, to the periodic test requirements. This report shall include the purchase order number, inspection lot number, AMS4456, size o
41、r part number, and quantity. This report shall also identify the forging vendor.4.4.2 The vendor of forging stock shall furnish with each shipment a report stating that the composition of the stock conforms to specified requirements. This report shall include the purchase order number, inspection lo
42、t number,AMS4456, size, and quantity.4.5 Resampling and RetestingIf any specimen used in the above tests fails to meet specified requirements, disposition of the product may be based on the results of testing two additional specimens for each original nonconforming specimen. Retest specimens from fo
43、rgings shall be taken from as close as possible to the same location in the same forging or a second forging from the same lot as was the original unacceptable specimen. Failure of any retest specimen to meet specified requirements shall be cause for rejection of the product represented. Results of
44、all tests shall be reported.SAE AMS4456 Page 7 of 75. PREPARATION FOR DELIVERY5.1 Identification5.1.1 ForgingsIn accordance with AMS2808.5.1.2 Forging StockAs agreed upon by purchaser and vendor.5.2 PackagingThe product shall be prepared for shipment in accordance with ASTM B 660 and in compliance w
45、ith applicable rules and regulations pertaining to the handling, packaging,and transportation of the product to ensure carrier acceptance and safe delivery. 6. ACKNOWLEDGMENTA vendor shall mention this specification number in all quotations and when acknowledging purchase orders.7. REJECTIONSProduct
46、 not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection.8. NOTES8.1 A change bar (|) 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 previo
47、us issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only.8.2 Hardness should be not lower th
48、an 140 HB/10/500 or 145 HB/10/1000, or equivalent, but forgings shall not be rejected on the basis of hardness if the tensile property requirements on the nonconforming part or other parts with equivalent lower hardness are met. Hardness determinations should be performed as a traverse from the T/2
49、planeto the outer edge of the parent forging.8.3 Terms used in AMS are clarified in ARP1917.8.4 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 documents shall specify not less than the following:AMS4456Fra
