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 ther
2、efrom, 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 2018 SAE International All rights reserved. No part of this
3、publication 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: +1 724-776-49
4、70 (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:/standards.sae.org/AMS4157E AEROSPACE MATERIAL SPECIFICATION AMS4157 REV. E Issued 1974-12 Revised 2018-01 Supers
5、eding AMS4157D Aluminum Alloy Extrusions 7.7Zn - 2.4Mg - 1.6Cu - 0.16Cr (7049-T73511) Solution Heat Treated, Stress Relieved, and Overaged (Composition similar to UNS A97049) RATIONALE AMS4157E revises Properties (3.3.1.1), Reports (4.4) and Identification (5.1.1), and results from a Five-Year Revie
6、w and update of this specification. 1. SCOPE 1.1 Form This specification covers an aluminum alloy in the form of extruded bars, rods, wire, shapes, and tubing 5.000 inches (127.00 mm) and under in nominal diameter or least thickness (wall thickness of tubing) (see 8.5) . 1.2 Application These produc
7、ts have been used typically for parts in structural applications requiring a combination of high strength and good stress-corrosion resistance, 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 form
8、s 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 cancelled and no superseding document has been specified, the last published issue of that
9、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 +1 724-776-4970 (outside USA), www.sae.org. AMS2355 Quality Assurance Sampling and Testing, Aluminum Alloys and Magnesium Alloy
10、s, Wrought Products, Except Forging Stock, and Rolled, Forged, or Flash Welded Rings AMS2772 Heat Treatment of Aluminum Alloy Raw Materials ARP1917 Clarification of Terms Used in Aerospace Metals Specifications SAE INTERNATIONAL AMS4157E Page 2 of 6 2.2 ASTM Publications Available from ASTM Internat
11、ional, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM B594 Ultrasonic Inspection of Aluminum-Alloy Products for Aerospace Applications ASTM B660 Packaging/Packing of Aluminum and Magnesium Products ASTM B666/B666M Identification Marking
12、of Aluminum light polishing to remove minor surface imperfections is permissible provided such imperfections can be removed within the dimensional tolerances. SAE INTERNATIONAL AMS4157E Page 3 of 6 3.3 Properties Extrusions 5.000 inches (127.00 mm) and under in nominal diameter or least thickness (w
13、all thickness of tubing) shall conform to the following requirements, determined in accordance with AMS2355: 3.3.1 Tensile Properties Shall be as specified in Table 2. 3.3.1.1 Mechanical property requirements for produce outside the thickness range of 1.1 shall be as agreed upon by purchaser and pro
14、ducer. Table 2 Table 2A - Minimum tensile properties, inch/pound units Nominal Diameter or Least Thickness (Bars, Rods, Wire, Shapes) or Nominal Wall Thickness (Tubing) Inches Specimen Orientation Tensile Strength ksi Yield Strength at 0.2% Offset ksi Elongation in 2 Inches or 4D % Up to 3.000, excl
15、 Longitudinal 74.0 64.0 7 Long-Trans. 70.0 60.0 5 3.000 to 5.000, incl Longitudinal 72.0 62.0 7 Long-Trans. 68.0 58.0 5 Table 2B - Minimum tensile properties, SI units Nominal Diameter or Least Thickness (Bars, Rods, Wire, Shapes) or Nominal Wall Thickness (Tubing) mm Specimen Orientation Tensile St
16、rength MPa Yield Strength at 0.2% Offset MPa Elongation in 50.8 mm or 4D % Up to 76.20, excl Longitudinal 510 441 7 Long-Trans. 483 414 5 76.20 to 127.00, incl Longitudinal 496 427 7 Long-Trans. 469 400 5 3.3.2 Stress-Corrosion Cracking Resistance Specimens cut from extrusions shall meet the conduct
17、ivity test of 3.3.2.1 and shall exhibit no evidence of stress-corrosion cracking when tested in accordance with 3.3.2.2. The test of 3.3.2.2 need not be performed on extrusions meeting the requirements of 3.3.2.1. 3.3.2.1 Conductivity Shall be not lower than 40.0% IACS (International Annealed Copper
18、 Standard) (23.2 MS/m). 3.3.2.1.1 If the conductivity is below 40.0% IACS (23.2 MS/m), the extrusions may be given additional overaging heat treatment as in 3.2, and if, upon completion of such treatment, extrusions develop conductivity/tensile property relationships conforming to 3.3.1 and 3.3.2.1,
19、 extrusions shall be acceptable. SAE INTERNATIONAL AMS4157E Page 4 of 6 3.3.2.2 Stress-Corrosion Cracking Resistance Specimens, cut from extrusions 0.750 inch (19.05 mm) and over in nominal diameter or least thickness, shall show no evidence of stress-corrosion cracking when stressed in the short-tr
20、ansverse (perpendicular to grain flow) direction to 65% of the specified minimum longitudinal (parallel to grain flow) yield strength. 3.4 Quality Extrusions, as received by purchaser, shall be uniform in quality and condition, sound, and free from foreign materials and from imperfections detrimenta
21、l to usage of the extrusions. 3.4.1 When specified by purchaser, extrusions shall be subjected to ultrasonic inspection in accordance with ASTM B594 and shall meet Class A acceptance limits of that specification. 3.5 Tolerances Shall conform to all applicable requirements of ANSI H35.2 or ANSI H35.2
22、M. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The producer of extrusions shall supply all samples for producers tests and shall be responsible for the performance of all required tests. Purchaser reserves the right to sample and to perform any confirmatory testing deemed neces
23、sary to ensure that the extrusions conform to specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Composition (3.1), tensile properties (3.3.1), conductivity (3.3.2.1), ultrasonic inspection (3.4.1) when specified, and tolerances (3.5) are acceptance tests and shall be perform
24、ed on each lot. 4.2.2 Periodic Tests Stress-corrosion resistance (3.3.2.2) is a periodic test and shall be performed at a frequency selected by the producer 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 Fo
25、r Electrical Conductivity Specimens for electrical conductivity testing (3.3.2.1) shall be the samples used for tensile testing. Electrical conductivity shall be determined on the surface of test specimens 0.100 inch (2.54 mm) and under in nominal diameter and subsurface on test specimens over 0.100
26、 inch (2.54 mm) in nominal thickness. 4.4 Reports The producer of extrusions shall furnish with each shipment a report stating that the extrusions conform to the composition and showing the results of tests to determine conformance to the other acceptance tests and, when performed, to the periodic t
27、est requirements. This report shall include the purchase order number, lot number, AMS4157E, size or section identification, and quantity. The report shall also identify the producer, the product form, and the mill produced size. SAE INTERNATIONAL AMS4157E Page 5 of 6 4.4.1 When material produced to
28、 this specification is beyond the sizes allowed in the scope or tables, or other exceptions are taken to the technical requirements listed in Section 3 (see 5.1.1), the report shall contain a statement “This material is certified as AMS4157E(EXC) because of the following exceptions.” and the specifi
29、c exceptions shall be listed. 4.5 Resampling and Retesting Shall be in accordance with AMS2355. 5. PREPARATION FOR DELIVERY 5.1 Identification Shall be in accordance with ASTM B666/B666M. 5.1.1 When technical exceptions are taken (see 4.4.1), the material shall be marked with AMS4157(EXC). 5.2 Packa
30、ging Extrusions shall be prepared for shipment in accordance with ASTM B660 and in compliance with applicable rules and regulations pertaining to the handling, packaging, and transportation of the extrusions to ensure carrier acceptance and safe delivery. 6. ACKNOWLEDGMENT A producer shall mention t
31、his specification number and its revision letter in all quotations and when acknowledging purchase orders. 7. REJECTIONS Extrusions not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection. 8. NOTES 8.1 Revision Indicator A change bar (I) locate
32、d 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 this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisi
33、ons. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. 8.2 Terms used in AMS are presented in ARP1917. 8.3 Dimensions and properties in inch/pound units and the Fahrenheit temperatures are primary; dimensions and properties in SI units a
34、nd the Celsius temperatures are shown as the approximate equivalents of the primary units and are presented only for information. 8.4 Unless otherwise specified, the material producer shall work to the revision of this specification (AMS4157) in effect on the date of order placement. Unless otherwis
35、e specified, material manufactured and certified to the immediately previous revision of this specification (AMS4157) may be procured and used until inventory is depleted. SAE INTERNATIONAL AMS4157E Page 6 of 6 8.5 Purchase documents should specify not less than the following: AMS4157E Product form and size or section identification number of extrusions desired Property and acceptance requirements from the cognizant engineering organization applicable to sizes outside the range listed in 1.1 Quantity of extrusions desired PREPARED BY AMS COMMITTEE “D“
