1、AEROSPACE MATERIAL SPECIFICATION AMS4141 REV. G Issued 1966-03 Revised 2014-12 Superseding AMS4141F Aluminum Alloy Die Forgings 5.6Zn - 2.5Mg - 1.6Cu - 0.23Cr (7075-T73) Solution and Precipitation Heat Treated (Composition similar to UNS A97075) RATIONALE AMS4141G results from a Five Year Review and
2、 update of this specification, including technical changes to Properties (3.3) and Reports (4.4.3). 1. SCOPE 1.1 Form This specification covers an aluminum alloy in the form of die forgings up to 6 inches in thickness and forging stock of any size ordered to inch/pound units (See 8.5). 1.2 Applicati
3、on These forgings have been used typically for parts requiring good resistance to stress-corrosion cracking but with lower strength than AMS4126, 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 fo
4、rm 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 canceled and no superseding document has been specified, the last published issue of that
5、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 Sampling and Testing of Aluminum Alloys and Magnesium Alloys
6、, Wrought Products, Except Forging Stock, and Rolled, Forged, or Flash Welded Rings AMS2772 Heat Treatment of Aluminum Alloy Raw Material AMS2808 Identification, Forgings AS1990 Aluminum Alloy Tempers _ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the
7、 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 therefrom, is the sole responsibility of the user.” SAE reviews each technical report at least every fiv
8、e years at 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 me
9、ans, 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: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org
10、SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AMS4141G SAE INTERNATIONAL AMS4141G Page 2 of 6 2.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel
11、: 610-832-9585, www.astm.org. ASTM B 594 Ultrasonic Inspection of Aluminum-Alloy Products ASTM B 660 Packaging/Packing of Aluminum and Magnesium Products ASTM E 1417/E 1417M Liquid Penetrant Testing 2.3 ANSI Publications Available from American National Standards Institute, 25 West 43rd Street, New
12、York, NY 10036, Tel: 212-642-4900, www.ansi.org. ANSI H35.2 Dimensional Tolerances for Aluminum Mill Products 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 -
13、0.40 Iron - 0.50 Copper 1.2 2.0 Manganese - 0.30 Magnesium 2.1 2.9 Chromium 0.18 0.28 Zinc 5.1 6.1 Titanium - 0.20 Other Elements, each - 0.05 Other Elements, total - 0.15 Aluminum remainder 3.2 Condition The product shall be supplied in the following condition: 3.2.1 Forgings Solution and precipita
14、tion heat treated to the -T73 temper in accordance with AMS2772 (See AS1990). 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 AMS2355 on the mill produced size. Mechanical properties for
15、 product outside the range covered by Tables 2 and 3 shall be agreed upon between purchaser and producer. SAE INTERNATIONAL AMS4141G Page 3 of 6 3.3.1 Forgings 3.3.1.1 Tensile Properties Shall be as follows: 3.3.1.1.1 With Grain Flow Specimens, machined from forgings 6 inches and under in nominal th
16、ickness at time of heat treatment or from prolongations on such forgings, with axis of specimen in the area of gage length varying not more than 15 degrees from parallel to the forging flow lines, shall have properties specified in Table 2 provided the as-forged thickness is not more than twice the
17、heat treated thickness. TABLE 2 - Minimum Tensile Properties Nominal Thickness at Time of Heat Treatment Inches Tensile Strength ksi Yield Strength at 0.2% Offset ksi Elongation in 2 Inches or 4D %, min Up to 3, incl 66.0 56.0 7 Over 3 to 4, incl 64.0 55.0 7 Over 4 to 5, incl 62.0 53.0 7 Over 5 to 6
18、, incl 61.0 51.0 6 3.3.1.1.2 Across Grain Flow Specimens, machined from forgings 6 inches and under in nominal thickness at time of heat treatment or from prolongations on such forgings, with axis of specimen in the area of gage length varying not more than 15 degrees from perpendicular to the forgi
19、ng flow lines, shall have properties as specified in Table 3 provided the as-forged thickness is not more than twice the heat treated thickness. If configuration of the forging or prolongation cannot accommodate the transverse specimen described, properties of the forgings shall be as agreed upon by
20、 purchaser and vendor. TABLE 3 - Minimum Tensile Properties Nominal Thickness at Time of Heat Treatment Inches Tensile Strength ksi Yield Strength at 0.2% Offset ksi Elongation in 2 Inches or 4D %, min Up to 3, incl 62.0 53.0 3 Over 3 to 4, incl 61.0 52.0 2 Over 4 to 5, incl 59.0 51.0 2 Over 5 to 6,
21、 incl 58.0 50.0 2 3.3.1.2 Stress-Corrosion Resistance Forgings shall meet the conductivity test of 3.3.1.2.1 or shall exhibit no evidence of stress-corrosion cracking when tested in accordance with 3.3.1.2.2. The test of 3.3.1.2.2 need not be performed on forgings meeting the requirements of 3.3.1.2
22、.1.1, 3.3.1.2.1.2, and 3.3.1.2.1.3. 3.3.1.2.1 Conductivity Shall be as follows, determined on the surface of the sample: 3.3.1.2.1.1 If the conductivity is 40.0% IACS (International Annealed Copper Standard) or higher and longitudinal (with grain flow) tensile properties meet specified requirements,
23、 the forgings are acceptable. 3.3.1.2.1.2 If the conductivity is between 38.0 to 39.9% IACS, inclusive, if the longitudinal (with grain flow) tensile properties meet specified properties, and if the longitudinal yield strength does not exceed the specified minimum by more than 11.9 ksi, the forgings
24、 are acceptable. SAE INTERNATIONAL AMS4141G Page 4 of 6 3.3.1.2.1.3 If the conductivity is between 38.0 to 39.9% IACS, inclusive, and longitudinal (with grain flow) yield strength exceeds the specified minimum value by more than 11.9 ksi, the forgings shall be given additional precipitation heat tre
25、atment. If, after such treatment, the forgings meet the requirements of 3.3.1.2 and 3.3.1.2.1.1 or 3.3.1.2.1.2, the forgings are acceptable. 3.3.1.2.1.4 If the conductivity is below 38.0% IACS, the forgings are not acceptable but may be re-heat treated or given additional precipitation heat treatmen
26、t to meet the specified requirements. 3.3.1.2.2 Stress-Corrosion Cracking Resistance Specimens, cut from forgings 0.750 inch and over in nominal thickness, shall exhibit no evidence of stress-corrosion cracking when stressed in the short-transverse (across grain flow) direction to 75% of the specifi
27、ed minimum longitudinal (with grain flow) yield strength. 3.3.2 Forging Stock When a sample of stock is forged to a test coupon, with a degree of mechanical working not greater than that of the forgings, and heat treated in the same manner as forgings, tensile specimens taken from the heat treated c
28、oupon shall conform to the requirements of 3.3.1.1.1. If specimens taken from the stock after heat treatment in the same manner as forgings conform to the requirements of 3.3.1.1.1, the tests shall be accepted as equivalent to tests of a forged coupon. 3.4 Quality The product, as received by purchas
29、er, 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 Forgings shall be etched to produce a surface suitable for visual inspection of the forging surfaces. Surfaces shall be evaluated for defects such a
30、s seams, laps, bursts, and quench cracks. Surface imperfections which can be removed so that they do not reappear on re-etching and the required section thickness can be maintained are acceptable. 3.4.1.1 When specified, a sampling plan may be used in lieu of etching each forging. 3.4.2 When specifi
31、ed, die forgings shall be ultrasonically inspected in accordance with ASTM B 594 or other method acceptable to purchaser and shall meet Class B requirements. 3.4.3 When specified, forgings shall be subjected to fluorescent penetrant inspection in accordance with ASTM E 1417 or other method acceptabl
32、e to purchaser. Standards for acceptance shall be established by the cognizant engineering organization. 3.4.4 Grain flow of die forgings, except in areas which contain flash-line end grain, shall follow the general contour of the forgings showing no evidence of reentrant grain flow. 3.5 Tolerances
33、Forging stock shall conform to all applicable requirements of ANSI H35.2. 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
34、right to sample and to perform any confirmatory testing deemed necessary to ensure that the product conforms to specified requirements. SAE INTERNATIONAL AMS4141G Page 5 of 6 4.2 Classification of Tests 4.2.1 Acceptance Tests The following requirements are acceptance tests and except for composition
35、, shall be performed on each lot: 4.2.1.1 Composition (3.1). 4.2.1.2 Tensile properties (3.3.1.1), stress-corrosion resistance (3.3.1.2), surface visual examination (3.4.1), and when specified, ultrasonic inspection (3.4.2) and fluorescent penetrant inspection (3.4.3). 4.2.1.3 Tolerances (3.5) of fo
36、rging stock. 4.2.2 Periodic Tests Stress-corrosion cracking resistance (3.3.1.2.2), and grain flow (3.4.4) and ability of forging stock to develop required properties (3.3.2) are periodic tests and shall be performed at a frequency selected by the vendor unless frequency of testing is specified by p
37、urchaser. 4.3 Sampling and Testing Shall be in accordance with AMS2355 and 4.3.1. 4.3.1 Surface Imperfections (3.4.1) and, when specified, Ultrasonic Inspection (3.4.2) and Fluorescent Penetrant Inspection (3.4.3): All forgings. 4.4 Reports 4.4.1 The vendor of forgings or forging stock shall furnish
38、 with each shipment a report stating that the forgings conforms to the composition, tolerances and, when specified, results of non-destructive tests for fluorescent penetrant examination and ultrasonic testing, and showing the numerical results of tests on each inspection lot to determine conformanc
39、e to the other acceptance test requirements. This report shall include the purchase order number, inspection lot number(s), AMS4141G, size, and quantity. The report shall also identify the producer, the product form, and the size of the mill product. 4.4.2 The vendor of forging stock shall furnish w
40、ith each shipment a report stating that the composition of the stock conforms to the specified requirements. This report shall include the purchase order number, inspection lot number(s), AMS4141G, size, and quantity. 4.4.3 When the product is outside the range covered by 1.1, the report shall conta
41、in a statement to that effect. 4.5 Resampling and Retesting Shall be in accordance with AMS2355. 5. PREPARATION FOR DELIVERY 5.1 Identification Shall be as follows: 5.1.1 Forgings In accordance with AMS2808. 5.1.2 Forging Stock As agreed upon by purchaser and vendor. SAE INTERNATIONAL AMS4141G Page
42、6 of 6 5.2 Packaging 5.2.1 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. ACKNOWLEDGMENT A ven
43、dor shall include this specification number and its revision letter in all quotations and when acknowledging purchase orders. 7. REJECTIONS Product not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection. 8. NOTES 8.1 A change bar (|) located i
44、n 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, including technical revision.
45、 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 than 124 HB/10/500, or equivalent, determined in accordance with ASTM E 10. Hardness has been used to verify that product is properly processed, but an “
46、out-of-range hardness number” is not always indicative of product with “out-of-specified tensile strength”. Further analysis, including material composition verification, heat treat process parameter review, and/or tensile property measurement of product with out-of-range hardness, may be indicated.
47、 8.3 Hardness conversion tables for metals are presented in ASTM E 10. 8.4 Terms used in AMS are clarified in ARP1917. 8.5 Purchase documents should specify not less than the following: AMS4141G Part number of forgings required Size of forging stock required Quantity of forgings required Standards for fluorescent penetrant and ultrasonic standards, when specified Property and acceptance requirements from the cognizant engineering organization applicable to sizes outside the range listed in 1.1. PREPARED BY AMS COMMITTEE “D“
