1、_ 6$(7HFKQLFDO6WDQGDUGV%RDUG5XOHVSURYLGHWKDW7KLVUHSRUWLVSX EOLVKHGE6$(WRDGYDQFHWKHVWDWHRIWHFKQLFDODQGHQJL neering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any partLFXODUXVHLQFOXGLQJDQSDWHQWLQIULQJHPHQWDULVLQJWKHUHIURPLVWKHVROH UHVSRQVLELOLWRIW
2、KHXVHU 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 2016 SAE International All rights reserved. No part of this publication may be reproduced, stored in
3、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: 724-776-0790 Email:
4、 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/AMS4357 AEROSPACE MATERIAL SPECIFICATION AMS4357 Issued 2016-06 Aluminum Alloy, Die Forgings 3.5Cu 1.0Li - 0.04Mg 0.35Mn
5、0.45Ag 0.12Zr (2050-T852) Solution Heat Treated, Cold Worked and Artificially Aged (Composition similar to UNS A92050) RATIONALE AMS4357 is a new specification which covers aluminum-lithium alloy 2050-T852 in the form of die forgings. 1. SCOPE 1.1 Form This specification covers an aluminum alloy in
6、the form of die forgings from 2 inches (50.8 mm) to 10 inches (254 mm) in nominal thickness and forging stock of any size (see 8.5). 1.2 Application These forgings have been used typically for machined structural parts where low density is needed in combination with a high level of mechanical proper
7、ties and good 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 supplier may work to a
8、 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 International, 400 Commonwe
9、alth 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 Wrought Products (Except Forging Stock), and Rolled, Forged, or Flash Welded Rings AMS27
10、72 Heat Treatment of Aluminum Alloy Raw Materials AMS2808 Identification Forgings ARP1917 Clarification of Terms Used in Aerospace Metals Specifications SAE INTERNATIONAL AMS4357 Page 2 of 8 2.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohoc
11、ken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM B594 Ultrasonic Inspection of Aluminum-Alloy Wrought Products ASTM B645 Linear-Elastic Plane Strain Fracture Toughness Testing of Aluminum Alloys ASTM B660 Packaging/Packing of Aluminum and Magnesium Products ASTM E399 Linear Elastic Plane-St
12、rain Fracture Toughness (KIc) of Metallic Materials ASTM E1417/E1417M Liquid Penetrant Testing ASTM G47 Determining Susceptibility to Stress-Corrosion Cracking of 2XXX and 7XXX Aluminum Alloy Products 2.3 ANSI Accredited Publications Copies of these documents are available online at http:/webstore.a
13、nsi.org/. ANSI H35.1/H35.1MAlloy and Temper Designation Systems for Aluminum ANSI H35.2 Dimensional 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
14、in Table 1, determined in accordance with AMS2355. Table 1 - Composition Element min max Silicon - 0.08 Iron - 0.10 Copper 3.2 3.9 Manganese 0.20 0.50 Magnesium 0.20 0.6 Chromium - 0.05 Nickel 0.05 Zinc - 0.25 Titanium - 0.10 Silver 0.20 0.7 Gallium 0.05 Lithium 0.7 1.3 Vanadium 0.05 Zirconium 0.06
15、0.14 Other Elements, each - 0.05 Other Elements, total - 0.15 Aluminum remainder SAE INTERNATIONAL AMS4357 Page 3 of 8 3.2 Condition 3.2.1 Die Forgings Solution heat-treated in accordance with AMS2772, cold worked and stress-relieved by compressing to produce a 1 to 5% permanent set, and artificiall
16、y aged to the T852 temper (see ANSI H35.1/H35.1M) (see 8.2). 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. 3.3.1 Mechanical property requirements for
17、 product outside of the range covered by 1.1 shall be agreed upon between purchaser and producer. 3.3.2 Die Forgings SAE INTERNATIONAL AMS4357 Page 4 of 8 3.3.2.1 Tensile Properties Tensile specimens, machined from forgings or from prolongations of such forgings, shall be taken with axis of specimen
18、s parallel (varying not more than 15 degrees from parallel) to each applicable grain flow direction specified in Table 2. 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
19、 ksi Elongation in 4D % Over 2.000 to 3.000, incl Longitudinal 74.0 68.0 8 Long-Trans. 74.0 68.0 6 Short-Trans. 73.0 64.0 3 Over 3.000 to 4.000, incl Longitudinal 74.0 68.0 7 Long-Trans. 73.0 67.0 6 Short-Trans. 73.0 63.0 3 Over 4.000 to 5.000, incl Longitudinal 74.0 67.0 6 Long-Trans. 73.0 66.0 6 S
20、hort-Trans. 72.0 62.0 2 Over 5.000 to 6.000, incl Longitudinal 73.0 67.0 6 Long-Trans. 72.0 65.0 6 Short-Trans. 71.0 61.0 2 Over 6.000 to 7.000, incl Longitudinal 73.0 66.0 5 Long-Trans. 71.0 64.0 5 Short-Trans. 71.0 61.0 2 Over 7.000 to 8.000, incl Longitudinal 72.0 66.0 5 Long-Trans. 71.0 63.0 5 S
21、hort-Trans. 70.0 60.0 2 Over 8.000 to 9.000, incl Longitudinal 72.0 65.0 5 Long-Trans. 70.0 63.0 5 Short-Trans. 70.0 60.0 2 Over 9.000 to 10.000, incl Longitudinal 71.0 64.0 4 Long-Trans. 69.0 62.0 4 Short-Trans. 69.0 59.0 1.5 SAE INTERNATIONAL AMS4357 Page 5 of 8 Table 2B - Minimum tensile properti
22、es, SI units Nominal Thickness At Time Of Heat Treatment Millimeters Specimen Orientation Tensile Strength MPa Yield Strength at 0.2% Offset MPa Elongation in 4D % Over 50.8 to 76.2, incl Longitudinal 510 469 8 Long-Trans. 510 469 6 Short-Trans. 503 441 3 Over 76.2 to 101.6, incl Longitudinal 510 46
23、9 7 Long-Trans. 503 462 6 Short-Trans. 503 434 3 Over 101.6 to 127.0, incl Longitudinal 510 462 6 Long-Trans. 503 455 6 Short-Trans. 496 427 2 Over 127.0 to 152.4, incl Longitudinal 503 462 6 Long-Trans. 496 448 6 Short-Trans. 490 421 2 Over 152.4 to 177.8, incl Longitudinal 503 455 5 Long-Trans. 49
24、0 441 5 Short-Trans. 490 421 2 Over 177.8 to 203.1, incl Longitudinal 496 455 5 Long-Trans. 490 434 5 Short-Trans. 483 414 2 Over 203.1 to 228.6, incl Longitudinal 496 448 5 Long-Trans. 483 434 5 Short-Trans. 483 414 2 Over 228.6 to 254, incl Longitudinal 490 441 4 Long-Trans. 476 427 4 Short-Trans.
25、 476 407 1.5 3.3.2.1.1 Special Purpose Forgings Tensile specimens cut from special purpose forgings shall meet the tensile property requirements specified on the drawing or as agreed upon by purchaser and producer. 3.3.2.2 Stress-Corrosion Resistance Specimens, cut from forgings and tested in accord
26、ance with ASTM G47, shall show no evidence of stress-corrosion cracking when stressed in the short-transverse direction at 45.0 ksi (310 MPa) for 30 days. 3.3.2.3 Fracture Toughness When specified, plane strain fracture toughness shall be tested in accordance to ASTM E399 and ASTM B645 for die forgi
27、ng having nominal thickness of 2.000 through 10.000 inches (50.8 mm through 254 mm), inclusive. A valid KIc meeting the UHTXLUHPHQWVRI$670(RUD.4XVHDEOHIRUORWUHOHDVHLQDFFRUGDQFHZLWK$ 670%VKDOOPHHWRUHFHHGWKHvalues specified in Table 3A and 3B. The required test directions shall be specified by purchas
28、er. SAE INTERNATIONAL AMS4357 Page 6 of 8 Table 3A minimum KIC RUNTXVDEOHIRUORWUHOHDVHLQFKSRXQGXQLWV Nominal Thickness Inches L-T ksiinch T-L ksiinch S-L ksiinch Over 2.000 to 3.000, incl 29 26 20 Over 3.000 to 4.000, incl 26 23 20 Over 4.000 to 5.000, incl 25 21 19 Over 5.000 to 6.000, incl 23 20 1
29、9 Over 6.000 to 7.000, incl 22 19 18 Over 7.000 to 8.000, incl 21 18 17 Over 8.000 to 9.000, incl 21 18 17 Over 9.000 to 10.000, incl 20 18 16 Table 3B Minimum KIC RUNTXVDEOHIRUORWUHOHDVH6,XQLWV Nominal Thickness Millimeters L_T MPam T-L MPam S-L MPam Over 50.8 to 76.2, incl 32 29 - Over 76.2 to 101
30、.6, incl 29 25 - Over 101.6 to 127.0, incl 27 23 21 Over 127.0 to 152.4, incl 25 22 21 Over 152.4 to 177.8, incl 24 21 20 Over 177.8 to 203.1, incl 23 20 19 Over 203.1 to 228.6, incl 23 20 19 Over 228.6 to 254.0, incl 22 20 18 3.3.3 Forging Stock When a sample of stock is forged to a test coupon and
31、 heat treated in the same manner as forgings, specimens taken from the heat treated coupon shall conform to the requirements of 3.3.2.1. The forging stock supplier, shall not be required to use unforged coupons when performing lot conformance testing. 3.4 Quality The product, as received by purchase
32、r, shall be uniform in quality and condition, sound, and free from foreign materials and from conditions detrimental to usage of the product. 3.4.1 When specified, each die forging shall be subjected to ultrasonic inspection in accordance with ASTM B594 and shall meet Class B acceptance criteria. 3.
33、4.2 When specified, each die forging shall be subjected to fluorescent penetrant testing in accordance with ASTM E1417/E1417M. Forgings shall be free from surface defects such as seams, laps, bursts, and quench cracks. 3.4.3 Grain flow of die forgings, except in areas which contain end grain, shall
34、follow the general contour of the forgings showing no evidence of reentrant grain flow. 3.5 Tolerances Forging stock shall conform to all applicable requirements of ANSI H35.2 or ANSI H35.2M. SAE INTERNATIONAL AMS4357 Page 7 of 8 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The
35、producer of forgings 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 necessary to ensure that the product conforms to specified requirements. 4.2 Cla
36、ssification of Tests 4.2.1 Acceptance Tests The following requirements are acceptance tests and, except for composition, shall be performed on each inspection lot. 4.2.1.1 Composition (3.1) of the product. 4.2.1.2 Tensile properties (3.3.2.1), and when specified, fracture toughness (3.3.2.3), ultras
37、onic soundness (3.4.1), and fluorescent penetrant inspection (3.4.2). 4.2.1.3 Tolerances (3.5) of forging stock. 4.2.2 Periodic Tests The following requirements are periodic tests and shall be performed at a frequency selected by the producer unless frequency of testing is specified by purchaser. 4.
38、2.2.1 Stress corrosion resistance (3.3.2.2). 4.2.2.2 Ability of forging stock to develop required tensile properties (3.3.3). 4.2.2.3 Grain flow of die forgings (3.4.3). 4.3 Sampling and Testing Shall be in accordance with AMS2355 and the following: 4.3.1 Tensile specimens machined from forgings sha
39、ll be excised from the area specified on the engineering drawing. 4.4 Reports 4.4.1 The producer of the forgings shall furnish with each shipment a report stating that the product conforms to the composition and tolerances, and when specified, results and standards of nondestructive tests and fractu
40、re toughness, 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), AMS4357, size or part number, quantity and additional data agreed upon by
41、 purchaser and producer. 4.4.1.1 When the product size is outside the range covered by 1.1, the report shall contain a statement to that effect. 4.4.2 The producer of forging stock shall furnish with each shipment a report stating that the composition of the stock conforms to the requirements of thi
42、s specification. This report shall include the purchase order number, AMS4357, lot or ingot cast number, size, quantity, and additional data agreed upon by purchaser and producer. 4.5 Resampling and Retesting Shall be in accordance with AMS2355. SAE INTERNATIONAL AMS4357 Page 8 of 8 5. PREPARATION F
43、OR DELIVERY 5.1 Identification 5.1.1 Forgings In accordance with AMS2808. 5.1.2 Forging Stock As agreed upon by purchaser and producer. 5.2 Packaging The product shall be prepared for shipment in accordance with ASTM B660 and in compliance with applicable rules and regulations pertaining to the hand
44、ling, packaging, and transportation of the product to ensure carrier acceptance and safe delivery. 6. ACKNOWLEDGMENT A producer shall mention this specification number in all quotations and when acknowledging purchase orders. 7. REJECTIONS Product not conforming to this specification, or to modifica
45、tions authorized by purchaser, will be subject to rejection. 8. NOTES 8.1 Revision Indicator A change bar (l) 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 this document. An (R
46、) 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 Actual heat treatment (solution and ageing) is proprietary. 8.
47、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 should specify not less than the following: AMS4357 Form and size or part number of product desired Property and acceptance require
