SAE AMS 4149E-2016 Aluminum Alloy Die and Hand Forgings 5 6Zn - 2 5Mg - 1 6Cu - 0 23Cr (7175-T74) Solution and Precipitation Heat Treated (UNS A97175).pdf

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1、_ 6$(7HFKQLFDO6WDQGDUGV%RDUG5XOHVSURYLGHWKDW7KLVUHSRUWLVSX EOLVKHGE6$(WRDGYDQFHWKHVWDWH 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, LVWKHVROHUHV

2、SRQVLELOLWRIWKHXVHU 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 reproduce

3、d, 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: 724-77

4、6-0790 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/AMS4149E AEROSPACE MATERIAL SPECIFICATION AMS4149 REV. E Issued 1971-05 Reaffirmed 2010-05 Revised 2016-05 S

5、uperseding AMS4149D Aluminum Alloy, Die and Hand Forgings 5.6Zn - 2.5Mg - 1.6Cu - 0.23Cr (7175-T74) Solution and Precipitation Heat Treated (Composition similar to UNS A97175) RATIONALE AMS4149E revises Condition (3.2.2), Properties (3.3, Tables 2, 3, 4, and 5) and Reports (4.4.1.1), and is a Five Y

6、ear Review and update of this specification. 1. SCOPE 1.1 Form This specification covers an aluminum alloy in the form of die and hand forgings 6.000 inches (152.00 mm) and under in nominal thickness at time of heat treatment (see 8.5). 1.2 Application These products have been used typically for par

7、ts requiring a combination of good strength and 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

8、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 document shall apply. 2.1 SAE Publications Available fr

9、om 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, Wrought Products, (Except Forging Stock), and Rolled

10、, Forged or Flash Welded Rings AMS2772 Heat Treatment of Aluminum Alloy Raw Materials AMS2808 Identification Forgings SAE INTERNATIONAL AMS4149E Page 2 of 9 AMS-A-22771 Aluminum Alloy Forgings, Heat Treated ARP1917 Clarification of Terms Used in Aerospace Metals Specifications 2.2 ASTM Publications

11、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 Inspection of Aluminum-Alloy Wrought Products for Aerospace Applications ASTM B645 Linear-Elastic Plane Strain Fracture Toughness Testing o

12、f Aluminum Alloys ASTM B660 Packaging/Packing of Aluminum and Magnesium Products ASTM E10 Brinell Hardness of Metallic Materials ASTM E1417/E1417M Liquid Penetrant Examination 2.3 ANSI Accredited Publications Copies of these documents are available online at http:/webstore.ansi.org/. ANSI H35.1/H35.

13、1M Alloy 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 in Table 1, determined i

14、n accordance with AMS2355. Table 1 - Composition Element min max Zinc 5.1 6.1 Magnesium 2.1 2.9 Copper 1.2 2.0 Chromium 0.18 0.28 Iron - 0.20 Silicon - 0.15 Manganese - 0.10 Titanium - 0.10 Other Impurities, each - 0.05 Other Impurities, total - 0.15 Aluminum remainder SAE INTERNATIONAL AMS4149E Pag

15、e 3 of 9 3.2 Condition 3.2.1 Solution and precipitation heat treated to the T74 temper in accordance with AMS2772. 3.2.2 Forge stock used to produce forgings to this specification shall be ingot or wrought stock in -O or -F temper (see ANSI H35.1/H35.1M). Forge stock ordered to this specification is

16、 for processing to the requirements of paragraph 3.2. 3.3 Properties Forgings shall conform to the following requirements, determined in accordance with AMS2355 on the mill produced size. 3.3.1 Tensile Properties Shall be as follows: 3.3.1.1 Die Forgings 3.3.1.1.1 Longitudinal (With Grain Flow) Spec

17、imens, machined from forgings 6.000 inches (152.00 mm) and under in nominal thickness at time of heat treatment or from prolongations on such forgings, with axis of specimen in area of the gage length varying not more than 15 degrees from parallel to forging flow lines, shall have the properties sho

18、wn in Table 2. Table 2A - Minimum tensile properties, inch/pound units Nominal Thickness At Time of Heat Treatment Inches Tensile Strength ksi Yield Strength at 0.2% Offset ksi Elongation in 2 Inches or 4D % Up to 3.000, incl 76.0 66.0 7 Over 3 Over 3.000 to 4.000, incl 73.0 63.0 7 Over 4.000 to 5.0

19、00, incl 70.0 61.0 7 Over 5.000 to 6.000, incl 68.0 58.0 7 Table 2B - Minimum tensile properties, SI units Nominal Thickness At Time of Heat Treatment Millimeters Tensile Strength MPa Yield Strength at 0.2% Offset MPa Elongation in 50.8 mm or 4D % Up to 76.00, incl 524 455 7 Over 76.00 to 102.00, in

20、cl 503 434 7 Over 102.00 to 127.00, incl 483 420 7 Over 127.00 to 152.00, incl 469 400 7 SAE INTERNATIONAL AMS4149E Page 4 of 9 3.3.1.1.2 Across Grain Flow Specimens, machined from forgings 6 inches (152 mm) and under in nominal thickness at time of heat treatment or from prolongations on such forgi

21、ngs, with axis of specimen in area of gage length varying not more than 15 degrees from perpendicular to forging flow lines, shall have the properties shown in Table 3. If configuration of the forging or prolongation cannot accommodate transverse specimen described, acceptance of the forging shall b

22、e based on testing as in 3.3.1.1.3. Table 3A - Minimum tensile properties, inch/pound units Nominal Thickness At Time of Heat Treatment Inches Tensile Strength ksi Yield Strength at 0.2% Offset ksi Elongation in 2 Inches or 4D % Up to 3.000, incl 71.0 62.0 4 Over 3.000 to 4.000, incl 70.0 60.0 4 Ove

23、r 4.000 to 5.000, incl 68.0 58.0 4 Over 5.000 to 6.000, incl 65.0 55.0 4 Table 3B - Minimum tensile properties, SI units Nominal Thickness At Time of Heat Treatment Millimeters Tensile Strength MPa Yield Strength at 0.2% Offset MPa Elongation in 50.8 mm or 4D % Up to 76.00, incl 490 427 4 Over 76.00

24、 to 102.00, incl 483 414 4 Over 102.00 to 127.00, incl 469 400 4 Over 127.00 to 152.00, incl 448 379 4 3.3.1.1.2.1 Elongation requirements shall not apply to specimens having a gage length diameter less than 0.250 inch (6.35 mm), located in immediate proximity to an abrupt change in section thicknes

25、s, or located so that any part of the specimen gage length is located within 1/8 inch (3.2 mm) of the trimmed flash line. 3.3.1.1.3 At Angle to Grain Flow Specimens, machined from forgings 6.000 inches (152.00 mm) and under in nominal thickness at time of heat treatment or from prolongations on such

26、 forgings, with axis of specimen in area of gage length varying more than 15 degrees from parallel and also more than 15 degrees from perpendicular to forging flow line, shall have the properties shown in Table 4. Such test results shall be identified as neither longitudinal nor transverse tensile t

27、est results. 3.3.1.2 Hand Forgings Specimens, machined from forgings having an essentially square or rectangular cross section, shall have the properties shown in Table 4 provided that as-forged section thickness does not exceed 6 inches (150 mm). SAE INTERNATIONAL AMS4149E Page 5 of 9 Table 4A - Mi

28、nimum tensile properties, inch/pound units Nominal Thickness at Time of Heat Treatment Inches Specimen Orientation Tensile Strength ksi Yield Strength at 0.2% Offset ksi Elongation in 2 Inches or 4D % Up to 2.000, incl Longitudinal Long Trans. 73.0 71.0 63.0 60.0 9 5 Over 2.000 to 3.000, incl Longit

29、udinal Long Trans. Short Trans. 73.0 71.0 69.0 63.0 60.0 60.0 9 5 4 Over 3.000 to 4.000, incl Longitudinal Long Trans. Short Trans. 71.0 70.0 68.0 61.0 58.0 57.0 9 5 4 Over 4.000 to 5.000, incl Longitudinal Long Trans. Short Trans. 68.0 67.0 66.0 57.0 56.0 55.0 8 5 4 Over 5.000 to 6.000, incl Longit

30、udinal Long Trans. Short Trans. 65.0 64.0 63.0 54.0 52.0 52.0 8 5 4 Table 4B - Minimum tensile properties, SI units Nominal Thickness at Time of Heat Treatment Millimeters Specimen Orientation Tensile Strength MPa Yield Strength at 0.2% Offset MPa Elongation in 50.8 mm or 4D % Up to 51.00, incl Long

31、itudinal Long Trans. 503 490 434 414 9 5 Over 51.00 to 76.00, incl Longitudinal Long Trans. Short Trans. 503 490 476 434 414 414 9 5 4 Over 76.00 to 102.00, incl Longitudinal Long Trans. Short Trans. 490 483 469 421 400 393 9 5 4 Over 102.00 to 127.00, incl Longitudinal Long Trans. Short Trans. 469

32、462 455 393 386 379 8 5 4 Over 127.00 to 152.00, incl Longitudinal Long Trans. Short Trans. 448 441 434 372 359 359 8 5 4 3.3.2 Stress-Corrosion Resistance Indicator Test Conductivity shall be determined on the surface of the test specimen or sample, in accordance with AMS2355. 3.3.2.1 If conductivi

33、ty is 40.0% IACS (International Annealed Copper Standard) (23.2 MS/m) or higher and tensile properties meet specified requirements (see 3.3.1), forgings are acceptable. 3.3.2.2 If conductivity is 38.0 to 39.9 IACS (22.0 to 23.1 MS/m), inclusive, if tensile properties meet specified requirements (see

34、 3.3.1), and if yield strength does not exceed the specified minimum by more than 11.9 ksi (82 MPa), forgings are acceptable. 3.3.2.3 If conductivity is below 40.0 IACS (23.2 MS/m) and yield strength exceeds the specified minimum value (see 3.3.1) by more than 11.9 ksi (82 MPa), forgings are not acc

35、eptable. 3.3.2.4 If conductivity is below 38.0% IACS (22.0 MS/m), forgings are not acceptable and shall be reprocessed regardless of tensile properties. SAE INTERNATIONAL AMS4149E Page 6 of 9 3.3.2.5 Forgings that are not acceptable according to the requirements of 3.3.2.3 or 3.3.2.4 may be reheat t

36、reated or given additional precipitation heat treatment and retested. After such treatment, if all specified properties are met, the forging is acceptable. 3.3.3 Stress-Corrosion Cracking Resistance Testing Specimens, cut from forgings 0.750 inch (19.05 mm) and over in nominal thickness, shall show

37、no evidence of stress-corrosion cracking when stressed in the short-transverse direction (perpendicular to grain flow) to 35.0 ksi (241 MPa) for forgings 3.000 inches (76.00 mm) and under in nominal thickness and to 50% of the specified minimum longitudinal (with grain flow) yield strength for forgi

38、ngs over 3.000 inches (76.00 mm) in nominal thickness. 3.3.4 Fracture-Toughness When specified, plane strain fracture toughness shall be tested in accordance with ASTM E399 and ASTM B645 for die forgings having nominal thickness of 1.500 to 6.000 inches (38.10 to 152.40 mm), inclusive, and hand forg

39、ings 2.600 to 6.000 inches (66.00 to 152.40 mm) in nominal thickness. A valid KIc meeting the requirements of ASTM E399 or a KQ XVHDEOHIRUORWUHOHDVHLQDFFRUGDQFHZLWK$670%VKDOOPHHWRU exceed the values specified in Table 5. The required test directions shall be specified by purchaser. Table 5 - Minimum

40、 KIc or KQ XVHDEOHIRUORWUHOHDVHIUDFWXUHWRXJKQHVV Test Direction KIc or KQ KIc or KQ Die Forgings L-T T-L S-L 27.0 21.0 21.0 29.7 23.1 23.1 Hand Forgings L-T T-L S-L 30.0 25.0 21.0 33.0 27.5 23.1 3.3.5 Mechanical property requirements for product outside the range covered by 1.1 shall be agreed upon

41、between purchaser and producer. 3.3.6 Grain Flow 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 re-entrant grain flow. 3.4 Quality Forgings, as received by purchaser, shall be uniform in quality

42、and condition, sound, and free from foreign materials and from imperfections detrimental to usage of the forgings. 3.4.1 Forge stock shall be uniform in quality and condition, sound and free of foreign materials and from imperfections detrimental to usage as starting stock for product produced to th

43、is specification. 3.4.2 When specified, die forgings shall be etched to produce a surface suitable for visual examination of the forging surfaces for defect indications, such as seams, laps, bursts, and quench cracks. Surface imperfections which can be removed, which do not reappear on re-etching, a

44、nd do not reduce required section thickness are acceptable. inksi mMPaSAE INTERNATIONAL AMS4149E Page 7 of 9 3.4.3 When specified, forgings shall be subjected to ultrasonic inspection in accordance with ASTM B594 and shall meet the following requirements of that specification: 3.4.3.1 Die forgings 0

45、.500 to 4.000 inches (12.70 to 101.60 mm), inclusive, in nominal thickness and weighing not over 300 pounds (136 kg) shall meet Class A. 3.4.3.2 Hand forgings 1.000 to 6.000 inches (25.40 to 152.40 mm), inclusive, in nominal thickness and weighing not more than 600 pounds (272 kg) shall meet Class A

46、. 3.4.4 When specified, forgings shall be subjected to fluorescent penetrant inspection in accordance with ASTM E1417. Standards for acceptance shall be as agreed upon by purchaser and vendor. 3.5 Tolerances Forging stock shall conform to all applicable requirements of ANSI H35.2 and H35.2M. 4. QUAL

47、ITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection 7KHYHQGRURIIRUJLQJVVKDOOVXSSODOOVDPSOHVIRUYHQGRUVWHVWVDQGVKDOO EHUHVSRQVLEOHIRUWKHSH rformance of all required tests. Purchaser reserves the right to sample and to perform any confirmatory testing deemed necessary to ensure that the forgings conform to specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Composition (3.1), tensile properties (3.3.1), stress-corrosion resistance indicator test (3.3.2), tolerances (3.5), and, when specified, surface visual examination (3.4.2), fracture toughness (3.3