1、_ 6$(7HFKQLFDO6WDQGDUGV%RDUG5XOHVSURYLGHWKDW7KLVUHSRUWLVSX EOLVKHGE6$(WRDGYDQFHWKHVWDWHRIWHFKQLFDODQGHQJL neering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefrom, LVWKHVROHUHVSRQ
2、VLELOLWRIWKHXVHU 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,
3、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: +1 724-776-4970 (outside USA) Fax: 724-776-0
4、790 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/AMS4374 AEROSPACE MATERIAL SPECIFICATION AMS4374 Issued 2016-10 Aluminum Alloy, Extruded Profiles 8.9Zn - 2.2Cu - 2.2Mg - 0.1
5、5Zr (7136-T73511) Solution Heat Treated, Stress Relieved by Stretching, Straightened, and Overaged RATIONALE AMS4374 is a new specification for aluminum alloy 7136-T73511 extruded profiles. 1. SCOPE 1.1 Form This specification covers an aluminum alloy in the form of extruded rods, bars, and profiles
6、 (shapes) produced with maximum cross sectional area of 56.1 in2 (36 193 mm2) and a maximum circumscribing circle diameter (circle size) of 20.2 inches (513 mm) (see 8.4.1). 1.2 Application These extrusions have been used typically for structural aerospace applications requiring good strength and to
7、ughness combined with excellent corrosion resistance but are not limited to these applications. 1.2.1 Certain processing procedures may cause this product to become susceptible to stress-corrosion cracking. ARP823 recommends practices to minimize such conditions. 2. APPLICABLE DOCUMENTS The issue of
8、 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 a specific document issue is specified. When the referenced document has been cancelled and no s
9、uperseding document has been specified, the last published issue of that 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 Qu
10、ality Assurance, Sampling and Testing, Aluminum Alloys and Magnesium Alloy, Wrought Products (Except Forging Stock), and Rolled, Forged, or Flash Welded Rings AMS2772 Heat Treatment of Aluminum Alloy Raw Materials ARP823 Minimizing Stress-Corrosion Cracking in Wrought Heat-Treatable Aluminum Alloy P
11、roducts ARP1917 Clarification of Terms Used in Aerospace Metals Specifications SAE INTERNATIONAL AMS4374 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: 610-832-9585, www.astm.org. ASTM B594 Ultrasonic
12、Inspection of Aluminum Alloy Wrought Products for Aerospace Applications ASTM B660 Packaging of Aluminum and Magnesium Products ASTM B666/B666M Identification Marking of Aluminum and Magnesium Products ASTM E1004 Method for Electromagnetic (Eddy Current) Measurements of Electrical Conductivity ASTM
13、G34 Exfoliation Corrosion Susceptibility in 2xxx and 7xxx Aluminum Alloys (EXCO Test) ASTM G47 Determining Susceptibility to Stress-Corrosion Cracking of 2xxx and 7xxx Aluminum Alloy Products 2.3 ANSI Publications Copies of these documents are available online at http:/webstore.ansi.org/. ANSI H35.1
14、/H35.1M Alloy and Temper Designation Systems for Aluminum ANSI H 35.2 Dimensional Tolerances for Aluminum Mill Products ANSI H 35.2M Dimensional Tolerances for Aluminum Mill Products (Metric) 3. TECHNICAL REQUIREMENTS 3.1 Composition Shall conform to the percentages by weight shown in Table 1, deter
15、mined in accordance with AMS2355. Table 1 - Composition Element min max Silicon - 0.12 Iron - 0.15 Copper 1.9 2.5 Manganese - 0.05 Magnesium Chromium 1.8 - 2.5 0.05 Zinc 8.4 9.4 Titanium Zirconium - 0.10 0.10 0.20 Other Elements, each - 0.05 Other Elements, total - 0.15 Aluminum Remainder SAE INTERN
16、ATIONAL AMS4374 Page 3 of 6 3.2 Condition Extrusions shall be solution heat-treated, stress relieved by stretching after solution treatment to produce a nominal permanent set of 1.5%, but not less than 1% or more than 3%, and overaged to the -T73511 temper (see ANSI H35.1/H35.1M). 3.2.1 Extrusions i
17、n the -T73511 temper may receive minor straightening, after stretching, of an amount necessary to meet tolerance requirements of 3.6. 3.2.2 Extrusions shall be supplied with an as-extruded surface finish. Light polishing to remove minor surface imperfections is permissible provided such imperfection
18、s can be removed within specified dimensional tolerances. 3.3 Heat Treatment Shall be performed in accordance with the requirements of AMS2772, except as follows: 3.3.1 Solution Heat Treatment Heat to 870 to 890 F (466 to 477 C), hold at heat for a time commensurate with product thickness and rapidl
19、y cool in a suitable quenching medium. 3.3.2 Overaging Heat Treatment Overaging shall be performed at the specific time and temperatures necessary to meet the requirements of 3.4 (see 8.2). 3.4 Properties Product shall conform to the following requirements, determined on the mill produced size in ac
20、cordance with AMS2355. 3.4.1 Mechanical property requirements for products outside the range covered by 1.1 and Table 2 shall be agreed upon by the purchaser and producer. 3.4.2 Longitudinal and, when specified, long transverse tensile properties shall be as specified in Table 2. Table 2A - Minimum
21、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 % 0.040 to 0.249, incl Longitudinal Long-Transverse 80.0 79.0 73.0 71.0 7 4 0.250 to 0.499, incl Longitudinal Long-Transverse 80.0 78
22、.0 73.0 71.0 7 4 0.500 to 0.999, incl Longitudinal Long-Transverse 80.0 77.0 73.0 69.0 7 4 1.000 to 1.499, incl Longitudinal Long-Transverse 80.0 76.0 73.0 68.0 7 4 1.500 to 1.999, incl Longitudinal Long-Transverse 80.0 75.0 73.0 67.0 7 4 2.000 to 4.500, incl Longitudinal Long-Transverse 80.0 74.0 7
23、3.0 66.0 7 4 SAE INTERNATIONAL AMS4374 Page 4 of 6 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 5D % 1.02 to 6.32, incl Longitudinal Long-Transverse 552 545 503 490 7
24、 4 6.35 to 12.67, incl Longitudinal Long-Transverse 552 538 503 490 7 4 12.70 to 25.37, incl Longitudinal Long-Transverse 552 531 503 476 6 3 25.40 to 38.07, incl Longitudinal Long-Transverse 552 524 503 469 6 3 38.10 to 50.77, incl Longitudinal Long-Transverse 552 517 503 462 6 3 50.80 to 114.30, i
25、ncl Longitudinal Long-Transverse 552 510 503 455 6 3 3.4.3 Corrosion Resistance 3.4.3.1 Exfoliation Corrosion Resistance Specimens cut from extrusions shall not exhibit exfoliation corrosion at a T/10 plane greater than that illustrated by Photograph EA, Figure 2, of ASTM G34. 3.4.3.2 Stress-Corrosi
26、on Cracking Specimens cut from extrusions 0.750 inches (19.04 mm) and over in diameter or thickness shall show no evidence of stress corrosion cracking when stressed in the short-transverse direction (perpendicular to grain flow) to 45.0 ksi (310 MPa) for a minimum 20 day exposure, as determined in
27、accordance with ASTM G47. 3.4.4 Electrical Conductivity (EC) Shall be determined in accordance with ASTM E1004, on the surface of the test coupon prior to turning, but shall not be cause for rejection of the extrusions (see 8.3). 3.5 Quality Products, as received by purchaser, shall be uniform in qu
28、ality and condition, sound, and free from foreign materials and from conditions detrimental to usage of the extrusions. 3.5.1 When specified, each extrusion shall be subjected to ultrasonic inspection in accordance with ASTM B594. Extrusions with section thicknesses 0.500 to 1.499 inches shall meet
29、ultrasonic Class B requirements, as described in ASTM B594. Extrusions with section thickness 1.500 and over shall meet ultrasonic Class A requirements, as described in ASTM B594. 3.6 Tolerances Shall conform to all applicable requirements of ANSI H35.2 or ANSI H35.2M. SAE INTERNATIONAL AMS4374 Page
30、 5 of 6 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection 7KHSURGXFHURIWKHSURGXFWVVKDOOVXSSODOOVDPSOHVIRUSURGXFHUVWHVWVDQGVKDOO EHUHVSRQVLEOHIRUWKHSHUIRUPDQFHRIall required tests. Purchaser reserves the right to sample and to perform any confirmatory testing deemed necessary to ensur
31、e that the products conform to specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Composition (3.1), longitudinal and long transverse (when specified) tensile properties (3.4.2), ultrasonic inspection (when specified) (3.5.1), and tolerances (3.6) are acceptance tests and, ex
32、cept for composition, shall be performed on each inspection lot. 4.2.2 Periodic Tests Exfoliation corrosion resistance (3.4.3.1) and stress-corrosion cracking resistance (3.4.3.2) are periodic tests and shall be performed at a frequency selected by the producer unless frequency of testing is specifi
33、ed by the purchaser. 4.3 Sampling and Testing Shall be in accordance with AMS2355. 4.4 Reports The producer of the product shall furnish with each shipment a report stating that the product conforms to the composition, ultrasonic inspection when specified, and tolerances and showing the numerical re
34、sults of tests on each inspection lot for electrical conductivity, and to determine conformance to the other acceptance test requirements. This report shall include the purchase order number, inspection lot number, AMS4374, size or section identification number, and quantity. This report shall also
35、identify the producer, the product form, and the size of the mill product. 4.4.1 When the product size is outside the range covered by 1.1 and Table 2, the report shall contain a statement to that affect. 4.5 Resampling and Retesting Shall be in accordance with AMS2355. 5. PREPARATION FOR DELIVERY 5
36、.1 Identification Shall be in accordance with ASTM B666/B666M. 5.2 Packaging Products 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 product to ensure carrier accepta
37、nce and safe delivery. 6. ACKNOWLEDGEMENT A producer shall mention this specification number in all quotations and when acknowledging purchase orders. 7. REJECTIONS Products not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection. SAE INTERNATI
38、ONAL AMS4374 Page 6 of 6 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) symbol to the left of the document
39、 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 Extrusions produced to this specification exhibit a thin recrystallized surface layer similar to o
40、ther high strength 7xxx alloys. Limits on the thickness of the recrystallized surface layer can be guaranteed for specific profiles if requested by purchaser. 8.3 Electrical conductivity should be not lower than 37.5% IACS (International Annealed Copper Standard) (21.8 MS/m). 8.4 Terms used in AMS a
41、re clarified in ARP1917. 8.4.1 The circumscribing circle diameter is the diameter of the smallest circle which completely encloses the cross section of the as-extruded product. 8.5 Dimensions and properties in inch/pound units and the Fahrenheit temperatures are primary; dimensions and properties in
42、 SI units and the Celsius temperatures are shown as the approximate equivalents of the primary units and are presented only for information. 8.6 Purchase documents should specify not less than the following: AMS4374 Product form and size or section identification of extrusions desired Quantity of ex
43、trusions desired Property and acceptance requirements from the cognizant engineering organization applicable to sizes outside the range listed in 1.1.1 Ultrasonic inspection standards of extrusions when specified Longitudinal transvers tensile testing when specified Compressive yield strength testing when specified. PREPARED BY AMS COMM,77(
