SAE AMS 4344D-2011 Aluminum Alloy Extrusions 5 6Zn - 2 5Mg - 1 6Cu - 0 23Cr (7175-T73511) Solution Heat Treated Stress Relieved by Stretching Straightened and Overaged (UNS A97175).pdf

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 there

2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2011 SAE International All rights reserved. No part of this publication m

3、ay 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: +1 724-776-4970 (outside U

4、SA) 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:/www.sae.org/technical/standards/AMS4344D AEROSPACE MATERIAL SPECIFICATION AMS4344 REV. D Issued 1984-07 Revised 2011-12 Super

5、seding AMS4344C Aluminum Alloy, Extrusions 5.6Zn - 2.5Mg - 1.6Cu - 0.23Cr (7175-T73511) Solution Heat Treated, Stress Relieved by Stretching, Straightened, and Overaged (Composition similar to UNS A97175)RATIONALE AMS4344D results from a Five Year Review and update of this specification. 1. SCOPE 1.

6、1 Form This specification covers an aluminum alloy in the form of extruded bars, rods, and profiles. 1.2 Application These extrusions have been used typically for structural applications requiring a combination of high tensile properties, moderate fatigue strength, stress-corrosion resistance, and g

7、ood fracture toughness, 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 docum

8、ent 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 Commonwealth Drive, Warrendale, PA 1509

9、6-0001, Tel: 877-606-7323 (inside USA and Canada) or 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 AMS2772 Heat Treatment of Aluminum Al

10、loy Raw Materials AS1990 Aluminum Alloy Tempers SAE AMS4344D 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 B 594 Ultrasonic Inspection of Aluminum-Alloy Wrought Produc

11、ts for Aerospace Applications ASTM B 660 Packaging/Packing of Aluminum and Magnesium Products ASTM B 666/B 666M Identification Marking of Aluminum and Magnesium Products ASTM G 47 Determining Susceptibility to Stress-Corrosion Cracking of 2xxx and 7xxx Aluminum Alloys 2.3 ANSI Publications Available

12、 from American National Standards Institute, 25 West 43rd Street, New York, NY 10036-8002, Tel: 212-642-4900, www.ansi.org. 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

13、Shall conform to the percentages by weight shown in Table 1, determined in accordance with AMS2355. TABLE 1 - COMPOSITION Element min maxSilicon 0.15Iron 0.20Copper 1.2 2.0 Manganese 0.10Magnesium 2.1 2.9 Chromium 0.18 0.28Zinc 5.1 6.1 Titanium - 0.10Other Elements, each - 0.05Other Elements, total

14、- 0.15Aluminum remainder 3.2 Condition Extruded, solution heat treated, stress relieved by stretching to produce a nominal permanent set of 1.5%, but not less than 1% nor more than 3%, and overaged to the T73511 (See AS1990) temper. 3.2.1 Extrusions may receive minor straightening, after stretching,

15、 of an amount necessary to meet the 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 imperfections can be removed within specified dimensional tolerances. SAE AMS4344D Page 3

16、 of 6 3.3 Heat Treatment Heat treatment shall be performed in accordance with AMS2772 except as noted: 3.3.1 Solution Heat Treatment Solution heat treat at 870 F 10 (466 C 6). 3.3.2 Aging Recommended practice is 225 F 10 (107 C 6) for 6 to 8 hours followed by 350 F 10 (177 C 6) for 6 to 8 hours. 3.4

17、 Properties Extrusions shall conform to the following requirements, determined in accordance with AMS2355 on the mill produced size. 3.4.1 Tensile Properties Shall be as specified in Table 2A or 2B, determined on specimens from extrusions 0.250 to 2.000 inches (6.35 to 50.80 mm) in nominal thickness

18、 and up to 32 square inches (206 cm2), inclusive, in cross-sectional area. TABLE 2A - MINIMUM TENSILE STRENGTH, INCH/POUND UNITS Specimen Orientation TensileStrengthksi Yield Strengthat 0.2% Offsetksi Elongation in 2 Inches or 4D % Longitudinal 69.0 59.0 8 Long-Transverse 63.0 52.0 4 TABLE 2B - MINI

19、MUM TENSILE STRENGTH, SI UNITS Specimen Orientation TensileStrengthMPa Yield Strengthat 0.2% OffsetMPa Elongation in 50.8 mm or 5D % Longitudinal 476 407 8 Long-Transverse 434 359 4 3.4.2 Fracture Toughness When specified, plane strain fracture toughness (KIc) shall be not lower than the values show

20、n in Table 3A or 3B. TABLE 3A - MINIMUM FRACTURE TOUGHNESS, INCH/POUND UNITS Nominal Diameter or Least Thickness Inches SpecimenOrientation(See 8.2) KIcinchksi-Over 0.749 to 1.800, incl L-T 30 Over 0.749 to 1.800, incl T-L 22 TABLE 3B - MINIMUM FRACTURE TOUGHNESS, SI UNITS Nominal Diameter or Least

21、Thickness Millimeters SpecimenOrientation(See 8.2) KIcmMPa-Over 19.02 to 45.72, incl L-T 33 Over 19.02 to 45.72, incl T-L 24 SAE AMS4344D Page 4 of 6 3.4.3 Conductivity 3.4.3.1 If the conductivity is 40.0% IACS (International Annealed Copper Standard) (23.2 MS/m) or higher and the longitudinal tensi

22、le properties meet specified requirements, the extrusions are acceptable. 3.4.3.2 If the conductivity is 38.0 to 39.9% IACS (22.0 to 23.1 MS/m), the longitudinal tensile properties meet specified requirements, and the longitudinal yield strength does not exceed the specified minimum by more than 11.

23、9 ksi (82.0 MPa), the extrusions are acceptable. 3.4.3.3 If the conductivity is lower than 40.0% IACS (23.2 MS/m), and the longitudinal yield strength exceeds the specified minimum by more than 11.9 ksi (82.0 MPa), the extrusions shall be given additional overaging heat treatment. If, after such tre

24、atment, the extrusions meet the requirements of 3.4.1, 3.4.2 (when specified), and 3.4.3.1 or 3.4.3.2, extrusion are acceptable. 3.4.3.4 If the conductivity is below 38.0% IACS (22.0 MS/m), the extrusions are not acceptable. 3.4.3.4.1 Extrusions found to be unacceptable may be given additional overa

25、ging heat treatment, and if, upon completion of such treatment, they develop conductivity/property relationships conforming to 3.4.1, 3.4.2 (when specified), and 3.4.3.1 or 3.4.3.2, they shall be acceptable. 3.4.4 Stress-Corrosion Resistance Specimens, cut from extrusions 0.750 inch (19.05 mm) and o

26、ver in nominal diameter or section thickness, shall show no evidence of stress-corrosion cracking when stressed in the short-transverse (perpendicular to grain flow) direction to 44.0 ksi (303 MPa) when tested per ASTM G 47. 3.5 Quality Extrusions, as received by purchaser, shall be uniform in quali

27、ty and condition, sound, and free from foreign materials and from imperfections detrimental to usage of the extrusions. 3.5.1 When specified, extrusions shall be subjected to ultrasonic inspection in accordance with ASTM B 594 or other techniques acceptable to purchaser. Extrusions 0.500 to 1.499 in

28、ches (12.70 to 38.07 mm), inclusive, in nominal thickness, not exceeding 600 pounds (272 kg) in weight per piece, and not exceeding a 10 to 1 width-to-thickness ratio shall meet discontinuity class B. Extrusions 1.500 inches (38.10 mm) and over in nominal thickness not exceeding 600 pounds in weight

29、 (272 kg) per piece, and not exceeding a 10 to 1 width-to-thickness ratio shall meet discontinuity class A. 3.6 Tolerances Shall conform to all applicable requirements of ANSI H35.2 or ANSI H35.2M. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The vendor of extrusions shall suppl

30、y 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 confirmatory testing deemed necessary to ensure that the extrusions conform to specified requirements. SAE AMS4344D Page 5 of 6 4.2 Classifica

31、tion of Tests 4.2.1 Acceptance Tests Composition (3.1), tensile properties (3.4.1), fracture toughness (3.4.2) when specified, conductivity (3.4.3), ultrasonic inspection (3.5.1) when specified, and tolerances (3.6) are acceptance tests and, except for composition, shall be performed on each lot. 4.

32、2.2 Periodic Tests Stress-corrosion resistance (3.4.4) is a periodic test and shall be performed at a frequency selected by 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 When fracture toughness test

33、ing is required, at least two specimens from an extrusion from each inspection lot shall be tested; one in the LT direction and one in the TL direction (See 8.2). 4.4 Reports The vendor of extrusions shall furnish with each shipment a report stating that the extrusions conform to the composition, ul

34、trasonic inspection when specified, and tolerances 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, AMS4344D, size or section identificatio

35、n number, and quantity. The report shall also identify the producer, the mill product form, and the mill produced size. 4.5 Resampling and Retesting Shall be in accordance with AMS2355. 5. PREPARATION FOR DELIVERY 5.1 Identification Shall be in accordance with ASTM B 666/B 666M. 5.2 Packaging Extrus

36、ions shall be prepared for shipment in accordance with ASTM B 660 and in accordance with applicable rules and regulations pertaining to handling, packaging, and transportation of the extrusions to ensure carrier acceptance and safe delivery. 6. ACKNOWLEDGMENT A vendor shall mention this specificatio

37、n 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. SAE AMS4344D Page 6 of 6 8. NOTES 8.1 A change bar (l) located in the l

38、eft 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 revisions. Chang

39、e bars and (R) are not used in original publications, nor in documents that contain editorial changes only. 8.2 Specimen Orientation for Fracture Toughness Tests LT stress is applied in the longitudinal grain direction with crack propagating in the long-transverse grain direction and TL stress is ap

40、plied in the long-transverse grain direction with crack propagating in the longitudinal direction. 8.3 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 temp

41、eratures 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: AMS4344D Product form and size or section identification number of extrusions desired Quantity of extrusions desired. PREPARED BY AMS COMMITTEE “D”