1、AEROSPACE MATERIAL SPECIFICATION AMS4050 REV. J Issued 1974-12 Reaffirmed 2011-11 Revised 2014-12 Superseding AMS4050H Aluminum Alloy, Plate 6.2Zn - 2.3Cu - 2.2Mg - 0.12Zr (7050-T7451) Solution Heat Treated, Stress Relieved, and Overaged (Composition similar to UNS A97050) RATIONALE AMS4050J revises
2、 Properties (3.3.1.1, Tables 2 and 3), Fracture Toughness Testing (3.3.5, Table 3), Fatigue Specimen Finishing (3.3.6.2), Acceptance Tests (4.2.1) Sampling and Testing (4.3.2), Reports (4.4.1), and is a Five Year Review and update of this specification. 1. SCOPE 1.1 Form This specification covers an
3、 aluminum alloy in the form of plate. 1.1.1 This specification covers products from 0.250 to 8.000 inches (6 to 203 mm) in thickness, inclusive (See 8.4). 1.2 Application This plate has been used typically for parts requiring a high level of mechanical properties and good resistance to stress-corros
4、ion 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 supplier may work to a subsequent revision of a document unless
5、 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. _ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of
6、 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 therefrom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years a
7、t which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2014 SAE International All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, elec
8、tronic, 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: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE value
9、s your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AMS4050J SAE INTERNATIONAL AMS4050J Page 2 of 8 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and C
10、anada) or 724-776-4970 (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 Rings AMS2772 Heat Treatment of Aluminum Alloy Raw Materials AS1990 Aluminum Alloy Tem
11、pers 2.2 ASTM Publications 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 ASTM B 660 Packing/Packaging of Aluminum and Magnesium Products ASTM B645
12、 Linear-Elastic Plane-Strain Fracture Toughness Testing of Aluminum Alloys ASTM B 666/B 666M Identification Marking of Aluminum and Magnesium Products ASTM E399 Linear-Elastic Plane Strain Fracture Toughness KIc of Metallic Materials ASTM E 466 Force Controlled Constant Amplitude Axial Fatigue Tests
13、 of Metallic Materials ASTM G 34 Exfoliation Corrosion Susceptibility in 2XXX and 7XXX Series Aluminum Alloys (EXCO Test) 2.3 ANSI Publications Available from American National Standards Institute, 25 West 43rd Street, New York, NY 10036-8002, Tel: 212-642-4900, www.ansi.org. ANSI H35.2 Dimensional
14、Tolerances for Aluminum Mill Products ANSI H35.2M Dimensional Tolerances for Aluminum Mill Products (Metric) 3. TECHNICAL REQUIREMENTS 3.1 Composition Shall conform to the percentages by weight shown in Table 1, determined in accordance with AMS2355. SAE INTERNATIONAL AMS4050J Page 3 of 8 TABLE 1 -
15、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 Zirconium 0.08 0.15 Other Elements, each - 0.05 Other Elements, total - 0.15 Aluminum remainder 3.2 Condition Solution heat treated, stretched to prod
16、uce a nominal permanent set of 2% but not less than 1% nor more than 3%, and precipitation heat treated to the T7451 temper (See AS1990). Solution and precipitation heat treatment shall be performed in accordance with AMS2772. 3.2.1 Plate shall receive no further straightening operations after stret
17、ching. 3.3 Properties Plate shall conform to the following requirements, determined in accordance with AMS2355 on the mill produced size and as specified herein. 3.3.1 Tensile Properties Shall be as specified in Table 2. 3.3.1.1 Mechanical property requirements for product outside of the range cover
18、ed by Tables 2 and 3 shall be agreed upon between purchaser and producer. SAE INTERNATIONAL AMS4050J Page 4 of 8 TABLE 2A - Minimum Tensile Properties, Inch/Pound Units Nominal Thickness Inches Specimen Orientation Tensile Strength ksi Yield Strength at 0.2% Offset ksi Elongation in 2 Inches or 4D %
19、 0.250 to 2.000, incl Longitudinal 74.0 64.0 10 Long Trans. 74.0 64.0 9 Over 2.000 to 3.000, incl Longitudinal 73.0 63.0 9 Long Trans. 73.0 63.0 8 Short Trans. 68.0 59.0 3 Over 3.000 to 4.000, incl Longitudinal 72.0 62.0 9 Long Trans. 72.0 62.0 6 Short Trans. 68.0 58.0 3 Over 4.000 to 5.000, incl Lo
20、ngitudinal 71.0 61.0 9 Long Trans. 71.0 61.0 5 Short Trans. 67.0 57.0 3 Over 5.000 to 6.000, incl Longitudinal 70.0 60.0 8 Long Trans. 70.0 60.0 4 Short Trans. 67.0 57.0 3 Over 6.000 to 7.000, incl Longitudinal 69.0 59.0 7 Long Trans. 69.0 59.0 4 Short Trans. 66.0 56.0 3 Over 7.000 to 8.000, incl Lo
21、ngitudinal 68.0 58.0 6 Long Trans. 68.0 58.0 4 Short Trans. 65.0 55.0 3 TABLE 2B - Minimum Tensile Properties, SI Units Nominal Thickness Millimeters Specimen Orientation Tensile Strength MPa Yield Strength at 0.2% Offset MPa Elongation in 50.8 mm or 4D % Over 6 to 51, incl Longitudinal 510 441 10 L
22、ong Trans. 510 441 9 Over 51 to 76, incl Longitudinal 503 434 9 Long Trans. 503 434 8 Short Trans. 469 407 3 Over 76 to 102, incl Longitudinal 496 427 9 Long Trans. 496 427 6 Short Trans. 469 400 3 Over 102 to 127, incl Longitudinal 490 421 9 Long Trans. 490 421 5 Short Trans. 462 393 3 Over 127 to
23、152, incl Longitudinal 483 414 8 Long Trans. 483 414 4 Short Trans. 462 393 3 Over 152 to 178, incl Longitudinal 476 407 7 Long Trans. 476 407 4 Short Trans. 455 386 3 Over 178 to 203, incl Longitudinal 469 400 6 Long Trans. 469 400 4 Short Trans. 448 379 3 3.3.2 Corrosion-Resistance Resistance to s
24、tress-corrosion cracking and to exfoliation-corrosion shall be acceptable if the plate conforms to the requirements of 3.3.2.1 and 3.3.2.2. SAE INTERNATIONAL AMS4050J Page 5 of 8 3.3.2.1 Electrical Conductivity Shall be not lower than 38.0% IACS (International Annealed Copper Standard) (22.0 MS/m),
25、determined on the surface of the tensile coupon. 3.3.2.2 Stress-Corrosion Susceptibility Factor (SCF) Shall be not greater than 32.0 (220) IACS, determined by subtracting the electrical conductivity, AA.A% IACS (12 times BB.B MS/m) from the long- transverse yield strength, XX.X ksi (YYY MPa). Exampl
26、es: For 2.5 inches (64 mm) nominal thickness Inch/Pound Units 72.7 ksi - 38.6% IACS = 34.1 unacceptable 68.8 ksi - 40.2% IACS = 28.6 acceptable SI Units 501 MPa - 12 x 22.4 MS/m = 232 unacceptable 474 MPa - 12 x 23.3 MS/m = 194 acceptable 3.3.2.3 Plate not meeting the requirements of 3.3.2.1 or 3.3.
27、2.2 may be given additional precipitation heat treatment or reheat treated. After such treatment, if all specified properties are met, the plate is acceptable. 3.3.3 Exfoliation-Corrosion Test Plate shall not exhibit exfoliation-corrosion greater than that illustrated by Photo B, Figure 2, of ASTM G
28、 34. 3.3.4 Stress-Corrosion Test Specimens, cut from plate 0.750 inch (19.05 mm) and over in nominal thickness, shall show no evidence of stress-corrosion cracking when stressed in the short- transverse direction at 35.0 ksi (241 MPa). 3.3.5 Fracture Toughness When specified, plane strain fracture t
29、oughness shall be tested in accordance with ASTM E399 and ASTM B645 for plate 1.000 to 8.000 inches (25.40 to 203.20 mm) inclusive in nominal thickness. A valid KIc meeting the requirements of ASTM E399 or a KQ “useable for lot release” in accordance with ASTM B645 shall meet or exceed the values sp
30、ecified in Table 3. TABLE 3A - Minimum KIc or KQ “useable for lot release” Fracture Toughness, Inch/Pound Units Nominal Thickness Inches L-T ksi T-L ksi S-L ksi 1.000 to 2.000, incl 29 25 - Over 2.000 to 3.000, incl 27 24 21 Over 3.000 to 4.000, incl 26 23 21 Over 4.000 to 5.000, incl 25 22 21 Over
31、5.000 to 6.000, incl 24 22 21 Over 6.000 to 7.000, incl 23 21 21 Over 7.000 to 8.000, incl 23 21 21 SAE INTERNATIONAL AMS4050J Page 6 of 8 TABLE 3B - Minimum KIc or KQ “useable for lot release” Fracture Toughness, SI Units Nominal Thickness Millimeters L-T MPa T-L MPa S-L MPa 25.40 to 50.80, incl 32
32、 27 - Over 50.80 to 76.20, incl 30 26 23 Over 76.20 to 101.60, incl 28 25 23 Over 101.60 to 127.00, incl 27 24 23 Over 127.00 to 152.40, incl 26 24 23 Over 152.40 to 177.80, incl 25 23 23 Over 177.80 to 203.20, incl 25 23 23 3.3.6 Fatigue Resistance When specified, 4 to 8-inch (102 to 203-mm) thick
33、plate shall meet the requirements of Table 4. Two fatigue specimens from each end of the parent plate shall be sampled in the long transverse grain direction. These specimens are to be removed from the T/2, W/2 location. Fatigue testing of the specimen shall be conducted in air at 70 F + 5 (21 C + 3
34、) in accordance with ASTM E 466. They are to be tested at an R-ratio of 0.1, at a maximum stress of 35.0 ksi (241 MPa) and shall meet the fatigue requirements shown in Table 4. When agreed upon by the supplier and purchaser, alternate specimen location and test conditions, and fatigue life requireme
35、nts may be used. TABLE 4 - Fatigue Life Requirements Minimum cycles per test 90 000 cycles Lot Log Average of 4 tests, min 120 000 cycles Runout 200 000 cycles 3.3.6.1 Fatigue Specimen Design Fatigue samples shall be machined to ASTM E 466, Figure 1. The specimen shall have a 0.500 inch (12.70 mm) g
36、age diameter, a 2.00-inch (50.80 mm) gage section, and 3.0-inch (76.20 mm) fillet radius. The grip section may be varied to fit different grip configurations, but should have no less than a 1.0-inch (25.4 mm) diameter. 3.3.6.2 Fatigue Specimen Finishing Fatigue samples shall be longitudinally sanded
37、 to produce a fine satin finish of 16 Ra microinch (0.4 micrometer) or better. A medium grit emery paper shall be used to remove transverse machining marks, followed by progressively finer emery papers. Light oil shall be used as a lubricant. The use of an automated polishing system is highly recomm
38、ended. An equivalent procedure can be used provided it can be demonstrated that it gives equivalent results to those obtained using the above method. 3.3.6.2.1 Samples shall be ultrasonically cleaned with a suitable solvent to remove all traces of finishing/ sanding lubricant. 3.4 Quality Plate, as
39、received by purchaser, shall be uniform in quality and condition, sound, and free from foreign materials and from imperfections detrimental to usage of the plate. 3.4.1 When specified, each plate 0.500 inch to 8.000 inches (12.70 mm to 203.20 mm) in nominal thickness shall be ultrasonically inspecte
40、d in accordance with ASTM B 594 and shall meet the requirements of 3.4.1.1. 3.4.1.1 Plates shall meet the requirements for ultrasonic class A for plate 0.500 to 8.000 inches (12.70 to 203.20 mm) in nominal thickness. 3.5 Tolerances Shall conform to all applicable requirements of ANSI H35.2 or H35.2M
41、. SAE INTERNATIONAL AMS4050J Page 7 of 8 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The vendor of plate 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 conf
42、irmatory testing deemed necessary to ensure that the plate conforms to the specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Composition (3.1), tensile properties (3.3.1), corrosion resistance (3.3.2), tolerances (3.5), and, when specified, fracture toughness (3.3.5), fatigu
43、e (3.3.6) and ultrasonic soundness (3.4.1) are acceptance tests and except for composition, shall be performed on each inspection lot. 4.2.2 Periodic Tests Exfoliation corrosion resistance (3.3.3) and stress-corrosion resistance (3.3.4) are periodic tests and shall be performed at a frequency select
44、ed by the vendor unless frequency of testing is specified by purchaser. 4.3 Sampling and Testing Shall be in accordance with AMS2355 and the following: 4.3.1 Tensile specimens shall be taken with axis of specimens parallel to each applicable grain flow direction specified in Table 2. 4.3.2 When frac
45、ture toughness testing is specified specimens shall be taken from the center width of at least one plate in each lot for each specimen orientation specified by purchaser. 4.3.2.1 For L-T and T-L test orientations for plate 1.000 to 2.000 inches (25.40 to 50.80 mm) inclusive in nominal thickness, use
46、 full-thickness specimens having a width (W) meeting the dimensional requirements of ASTM E 399. 4.3.2.2 For L-T and T-L test orientations for plate over 2.00 to 4.000 inches (50.80 to 101.60 mm), inclusive, in nominal thickness, use specimens having a minimum thickness (B) of 2-inch (51-mm) and a w
47、idth (W) of 4.0 to 5.0 inches (102 to 127mm), centered at T/2. 4.3.2.3 For L-T and T-L test orientations for plate over 4.000 inches to 8.000 inches (101.60 to 203.20 mm), inclusive, in nominal thickness, use specimens having a minimum thickness (B) of 2-inch (51-mm) and a width (W) of 4.0 to 5.0 in
48、ches (102 to 127mm), centered at T/4. 4.3.2.4 For the S-L test orientation, the test specimens shall be centered at T/2. The test specimen dimensions shall meet the requirements of ASTM E 399 and ASTM B645. 4.4 Reports The vendor of plate shall furnish with each shipment a report stating that the pl
49、ate conforms to the composition, tolerances and when specified, ultrasonic inspection, and showing the numerical results of tests on each inspection lot to determine conformance to the other acceptance test requirements. This report shall include the purchase order number, inspection lot number(s), AMS4050J, size, and quantity. The report shall also identify the producer, the product form, and the size of the mill pr
