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 2015 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/AMS4108F AEROSPACE MATERIAL SPECIFICATION AMS4108 REV. F Issued 1992-01 Revised 2
5、003-08 Reaffirmed 2015-10 Superseding AMS4108E Aluminum Alloy, Hand Forgings 6.2Zn - 2.3Cu - 2.2Mg - 0.12Zr (7050-T7452) Solution Heat Treated, Compression Stress-Relieved, and Overaged (Composition similar to UNS A97050) RATIONALE AMS4108F has been reaffirmed to comply with the SAE five-year review
6、 policy. 1. SCOPE: 1.1 Form: This specification covers an aluminum alloy in the form of hand forgings 8 inches (203 mm) and under in nominal thickness, and of forging stock. 1.2 Application: These forgings have been used typically for machined structural parts subject to warpage during machining and
7、 requiring high strength and resistance to stress-corrosion cracking, but usage is not limited to such applications. 2. APPLICABLE DOCUMENTS: 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 suppli
8、er 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. 2.1 SAE Publications: Available from SAE, 400 Commo
9、nwealth Drive, Warrendale, PA 15096-0001 or www.sae.org. AMS 2355 Quality Assurance Sampling and Testing, Aluminum Alloys and Magnesium Alloys, Wrought Products, Except Forging Stock, and Rolled, Forged, or Flash Welded Rings AMS 2808 Identification, Forgings AMS 2772 Heat Treatment of Aluminum Allo
10、y Raw Materials AS1990 Aluminum Alloy Tempers2.2 ASTM Publications: Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959 or www.astm.org. ASTM B 594 Ultrasonic Inspection of Aluminum-Alloy Wrought Products for Aerospace Applications ASTM B 645 Plane Strain Fracture Toughness
11、Testing of Aluminum Alloys ASTM B 660 Packaging/Packing of Aluminum and Magnesium Products ASTM E 399 Plane-Strain Fracture Toughness of Metallic Materials ASTM G 34 Exfoliation Corrosion Susceptibility in 2XXX and 7XXX Series Aluminum Alloys (EXCO Test) ASTM G 47 Determining Susceptibility to Stres
12、s Corrosion Cracking of 2XXX and 7XXX Aluminum Alloys 2.3 ANSI Publications: Available from ANSI, 25 West 43rd Street, New York, NY 10036 or www.ansi.org. ANSI H35.2 Dimensional Tolerances for Aluminum Mill Products ANSI H35.2M Dimensional Tolerances for Aluminum Mill Products (Metric) 3. TECHNICAL
13、REQUIREMENTS: 3.1 Composition: Shall conform to the percentages by weight shown in Table 1, determined in accordance with AMS 2355: TABLE 1 - Composition Element min max Silicon - 0.12 Iron - 0.15 Copper 2.0 2.6 Manganese - 0.10 Magnesium 1.9 2.6 Chromium - 0.04 Zinc 5.7 6.7 Titanium - 0.06 Zirconiu
14、m 0.08 0.15 Other Elements, each - 0.05 Other Elements, total - 0.15 Aluminum remainder SAE INTERNATIONAL AMS4108F Page 2 of 8_ 3.2 Condition: The product shall be supplied in the following condition: 3.2.1 Forgings: Solution heat treated, stress-relieved by compressing to produce 1 to 5% permanent
15、set, and precipitation heat treated to the T7452 temper (See AS1990). Heat treatment shall be performed in accordance with AMS 2772. 3.2.2 Forging Stock: As ordered by the forging manufacturer. 3.3 Properties: The product shall conform to the following requirements, determined in accordance with AMS
16、 2355. 3.3.1 Forgings: 3.3.1.1 Tensile Properties: Specimens machined from forgings having essentially a rectangular or square cross-section, heat treated in the indicated thickness, shall have the properties shown in Table 2 provided that the as-forged thickness does not exceed 8.0 inches (203 mm).
17、 The long-transverse direction for square forgings shall be identified by the vendor. TABLE 2A - Minimum Tensile Properties, Inch/Pound Units Nominal Thickness at Time of Heat Treatment Inches Specimen Orientation Tensile Strength ksi Yield Strength at 0.2% Offset ksi Elongation in 4D % Up to 2, inc
18、l Longitudinal Long-Trans. 72.0 71.0 63.0 61.0 9 5 Over 2 to 3, incl Longitudinal 72.0 62.0 9 Long-Trans. 70.0 60.0 5 Short-Trans. 67.0 55.0 4 Over 3 to 4, incl Longitudinal 71.0 61.0 9 Long-Trans. 70.0 59.0 5 Short-Trans. 67.0 55.0 4 Over 4 to 5, incl Longitudinal 70.0 60.0 9 Long-Trans. 69.0 58.0
19、4 Short-Trans. 66.0 54.0 3 Over 5 to 6, incl Longitudinal 69.0 59.0 9 Long-Trans. 68.0 56.0 4 Short-Trans. 66.0 53.0 3 Over 6 to 7, incl Longitudinal 68.0 58.0 9 Long-Trans. 67.0 56.0 4 Short-Trans. 65.0 52.0 3 Over 7 to 8, incl Longitudinal 67.0 57.0 9 Long-Trans. 66.0 52.0 4 Short-Trans. 64.0 50.0
20、 3 SAE INTERNATIONAL AMS4108F Page 3 of 8_ TABLE 2B - Minimum Tensile Properties, SI Units Nominal Thickness At Time Of Heat Treatment Millimeters Specimen Orientation Tensile Strength MPa Yield Strength at 0.2% Offset MPa Elongation in 5D % Up to 51, incl Longitudinal 496 434 8 Long-Trans. 490 421
21、5 Over 51 to 76, incl Longitudinal 496 427 8 Long-Trans. 483 414 5 Short-Trans. 462 379 4 Over 76 to 102, incl Longitudinal 490 421 8 Long-Trans. 483 407 5 Short-Trans. 462 379 4 Over 102 to 127, incl Longitudinal 483 414 8 Long-Trans. 476 400 4 Short-Trans. 455 372 3 Over 127 to 152, incl Longitudi
22、nal 476 407 8 Long-Trans. 469 386 4 Short-Trans. 455 365 3 Over 152 to 178, incl Longitudinal 469 400 8 Long-Trans. 462 386 4 Short-Trans. 448 359 3 Over 178 to 203, incl Longitudinal 462 395 8 Long-Trans. 455 365 4 Short-Trans. 441 345 3 3.3.1.1.1 Tensile specimens shall be excised from the T/2 and
23、 W/2 location at a distance not less than T from the “as heat-treated” edges of the forging. 3.3.1.2 Corrosion Resistance: Resistance to stress-corrosion cracking and to exfoliation-corrosion 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 Conductivity: Sha
24、ll be not lower than 38.0% IACS (International Annealed Copper Standard) (22.0 MS/m). 3.3.1.2.2 Stress-Corrosion Susceptibility Factor (SCF): Shall be not greater than 32.0 (220), determined by subtracting the electrical conductivity, AA.A% IACS (12 times BB.B MS/m), from the long transverse yield s
25、trength, XX.X ksi (YYY MPa). Examples: Inch/Pound Units 72.0 ksi - 38.5% IACS = 33.5 Unacceptable 68.0 ksi - 40.2% IACS = 27.8 Acceptable SI Units 496 MPa - 12 X 22.3 MS/m = 228.4 Unacceptable 469 MPa - 12 X 23.3 MS/m = 189.4 Acceptable SAE INTERNATIONAL AMS4108F Page 4 of 8_ 3.3.1.2.3 Forgings not
26、conforming to 3.3.1.3.1 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. 3.3.1.3 Exfoliation-Corrosion Resistance: Specimens cut from forgings shall show a level of exfoliation-corrosion at any plane less than that illustrated by Photograp
27、h EB, Figure 2, of ASTM G 34. 3.3.1.4 Stress-Corrosion Resistance: Specimens as in 4.3.1 cut from forgings shall show no evidence of stress-corrosion 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 Toughness: W
28、hen specified, forgings shall meet the values of KICshown in Table 3, determined in accordance with ASTM B 645. TABLE 3A - Fracture Toughness Parameters, Inch/Pound Units Specimen Orientation Nominal Thickness Inches Minimum KICksi inch L-T 1.500 to 3.000, incl 27 Over 3.000 to 4.000, incl 26 Over 4
29、.000 to 8.000, incl 25 TABLE 3B - Fracture Toughness Parameters, SI Units Specimen Orientation Nominal Thickness Millimeters Minimum KICMPa m L-T 38.10 to 76.20, incl 29.7 Over 76.20 to 101.60, incl 28.6 Over 101.60 to 203.20, incl 27.5 3.3.1.5.1 KQvalues shall meet all requirements of ASTM E 399 fo
30、r KICexcept that invalid 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 Stock: When a sample of stock is forged to a test coupon having a degree of mechanical working not greate
31、r than the forging and 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
32、 a forged coupon. 3.4 Quality: The 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. SAE INTERNATIONAL AMS4108F Page 5 of 8_ 3.4.1 When specified, forgings shall be subjecte
33、d to ultrasonic inspection in accordance with ASTM B 594 and shall meet the following requirements: 3.4.1.1 Forgings with nominal section thicknesses from 1.000 to 8.000 inches (25.40 to 203.20 mm), inclusive, and weights of each piece up to 600 pounds (272 kg) shall meet ultrasonic Class A. 3.5 Tol
34、erances: Forging stock shall conform to all applicable requirements of ANSI H35.2 or ANSI H35.2M. 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 test
35、s. Purchaser reserves the right to sample and to perform any confirmatory testing deemed necessary to ensure that the product conforms to specified requirements. 4.2 Classification of Tests: 4.2.1 Acceptance Tests: The following requirements are acceptance tests and, except for composition, shall be
36、 performed on each inspection lot as applicable: 4.2.1.1 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
37、 stock. 4.2.2 Periodic Tests: Exfoliation-corrosion resistance (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 selected by the vendor unless frequenc
38、y of testing is specified by purchaser. 4.3 Sampling and Testing: Shall be in accordance with AMS 2355 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 f
39、urnace consecutively during an eight-hour period. 4.3.1 Stress-Corrosion Resistance: Samples, taken from a forging or a forging prolongation, shall be not less than 0.750 inch (19.05 mm) in thickness. SAE INTERNATIONAL AMS4108F Page 6 of 8_ 4.3.2 For Ultrasonic Inspection, When Required: Each forgin
40、g. 4.4 Reports: 4.4.1 The vendor of forgings shall furnish with each shipment a report stating that the composition conforms to specified requirements and showing the results of tests on each inspection lot to determine conformance to the other acceptance test requirements and, when performed, to th
41、e periodic test requirements. This report shall include the purchase order number, inspection lot number, AMS 4108F, size or 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 com
42、position of the stock conforms to specified requirements. This report shall include the purchase order number, inspection lot number, AMS 4108F, size, and quantity. 4.5 Resampling and Retesting: If any specimen used in the above tests fails to meet specified requirements, disposition of the product
43、may be based on the results of testing two additional specimens for each original nonconforming specimen. Retest specimens from forgings 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.
44、Failure of any retest specimen to meet specified requirements shall be cause for rejection of the product represented. Results of all tests shall be reported. 5. PREPARATION FOR DELIVERY: 5.1 Identification: Shall be as follows: 5.1.1 Forgings: In accordance with AMS 2808. 5.1.2 Forging Stock: As ag
45、reed upon by purchaser and vendor. 5.2 Packaging: The product shall be prepared 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 product to ensure carrier acceptance and safe delivery. 6
46、. ACKNOWLEDGMENT: A vendor shall mention this specification number and its revision letter in all quotations and when acknowledging purchase orders. SAE INTERNATIONAL AMS4108F Page 7 of 8_ 7. REJECTIONS: Product not conforming to this specification, or to modifications authorized by purchaser, will
47、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 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, including technical revision. Change bars and (R) are not used in original publications, nor
