1、 AEROSPACE MATERIAL SPECIFICATION Aluminum Alloy, Die and Hand Forgings and Rolled Rings 5.6Zn - 2.5Mg - 1.6Cu - 0.23Cr (7075-T6) Solution and Precipitation Heat Treated (Composition similar to UNS A97075) AMS 4126C Superseding AMS 4126B 1. SCOPE: 1.1 Form: This specification covers an aluminum allo
2、y in the form of die forgings, hand forgings, rolled rings, and stock for forging or rolled rings. 1.2 Application: These products have been used typically for applications requiring high strength in light-to-medium sections, but usage is not limited to such applications. 1.2.1 Certain design and pr
3、ocessing procedures may cause these products to become susceptible to stress-corrosion cracking; ARP823 recommends practices to minimize such conditions. 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 th
4、e 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 document shall apply. Issued 1973-05
5、 Revised 2005-08 Reaffirmed 2010-10 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
6、 patent infringement arising therefrom, 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 2010 SAE International All rights reser
7、ved. No part of this 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 Canad
8、a) Tel: +1 724-776-4970 (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:/www.sae.org/technical/standards/AMS4126C SAE - 2 - AMS 4126C AMS 4126C 2.1 SAE Publications
9、: Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001 or www.sae.org. AMS 2355 Quality Assurance Sampling and Testing, Aluminum Alloys and Magnesium Alloys, Wrought Products, Except Forging Stock, and Rolled, Forged, or Flash Welded Rings AMS 2772 Heat Treatment of Aluminum Alloy R
10、aw Materials AMS 2808 Identification, Forgings ARP823 Minimizing Stress-Corrosion Cracking in Wrought Heat-Treatable Aluminum Alloy Products AS1990 Aluminum Alloy Tempers 2.2 ASTM Publications: Available from ASTM, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428- 2959 or www.astm.o
11、rg. ASTM B 594 Ultrasonic Inspection of Aluminum Alloy-Wrought Products for Aerospace Applications ASTM B 660 Packaging/Packing of Aluminum and Magnesium Products ASTM E 1417 Liquid Penetrant Examination 2.3 ANSI Publications: Available from American National Standards Institute, Inc., 23 West 43rd
12、Street, New York, NY 10036-8002. ANSI H35.2 Dimensional Tolerances for Aluminum Mill Products ANSI H35.2M Dimensional Tolerances for Aluminum Mill Products (Metric) SAE - 3 - AMS 4126C AMS 4126C 3. TECHNICAL REQUIREMENTS: 3.1 Composition: Shall conform to the percentages by weight shown in Table 1,
13、determined in accordance with AMS 2355. TABLE 1 - Composition Element min max Silicon Iron Copper Manganese Magnesium Chromium Zinc Titanium Other Elements, each Other Elements, total Aluminum - - 1.2 - 2.1 0.18 5.1 - - - remainder 0.40 0.50 2.0 0.30 2.9 0.28 6.1 0.20 0.05 0.15 3.2 Condition: Shall
14、be as follows: 3.2.1 Die Forgings, Hand Forgings, and Rolled Rings: Solution and precipitation heat treated in accordance with AMS 2772 to the -T6 temper (See AS1990). 3.2.2 Stock for Forging or Rolled Rings: As ordered by the forging or rolled ring manufacturer. 3.3 Properties: The product shall co
15、nform to the following requirements, determined on the mill product in accordance with AMS 2355: 3.3.1 Die Forgings, Hand Forgings, and Rolled Rings: 3.3.1.1 Tensile Properties: Shall be as follows: 3.3.1.1.1 Die Forgings: 3.3.1.1.1.1 With Grain Flow: Specimens, machined from forgings 4 inches (102
16、mm) and under in nominal thickness at time of heat treatment or from prolongations on such forgings, with axis of specimen in area of gage length varying not more than 15 degrees from parallel to the forging flow lines, shall have the properties shown in Table 2 provided the as-forged thickness is n
17、ot more than twice the heat treated thickness. SAE - 4 - AMS 4126C AMS 4126C 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 1, incl Over 1 to 3, inc
18、l Over 3 to 4, incl 75.0 74.0 73.0 64.0 63.0 62.0 7 7 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 25, incl Over 25 to 76, incl Over 76 to 102, incl
19、 517 510 503 441 434 427 7 7 7 3.3.1.1.1.2 Across Grain Flow: Specimens, machined from forgings 4 inches (102 mm) and under in nominal thickness at time of heat treatment or from prolongations on such forgings, with axis of specimen in area of gage length varying not more than 15 degrees from perpen
20、dicular to the forging flow lines, shall have the properties shown in Table 3 provided the as-forged thickness is not more than twice the heat treated thickness. If configuration of the forging or prolongation cannot accommodate the transverse specimen described, acceptance of the forging shall be b
21、ased on testing as in 3.3.1.1.1.3. 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 2, incl Over 2 to 3, incl Over 3 to 4, incl 71.0 70.0 70.0 61.0 60
22、.0 60.0 3 3 2 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 51, incl Over 51 to 76, incl Over 76 to 102, incl 490 483 483 421 414 414 3 3 2 3.3.1.1.1.2
23、.1 Elongation requirements shall not apply to specimens having a gage length diameter less than 0.250 inch (6.35 mm) or located in immediate proximity to an abrupt change in thickness or located so that any part of the specimen gage length is located within 1/8 inch (3.2 mm) of the trimmed flash lin
24、e. SAE - 5 - AMS 4126C AMS 4126C 3.3.1.1.1.3 At Angle to Grain Flow: Specimens, machined from forgings 4 inches (102 mm) and under in nominal thickness at time of heat treatment or from prolongations on such forgings, with axis of specimen in area of gage length varying more than 15 degrees from par
25、allel and also more than 15 degrees from perpendicular to the forging flow lines, shall have the properties shown in Table 3 provided the as-forged thickness is not more than twice the heat treated thickness. Such test results shall be identified as neither longitudinal nor transverse tensile proper
26、ties. 3.3.1.1.2 Hand Forgings: Specimens, machined from forgings having an essentially square or rectangular cross-section, shall have the properties shown in Table 4 provided the as-forged thickness does not exceed 6 inches (152 mm). TABLE 4A - Minimum Tensile Properties, Inch/Pound Units Nominal T
27、hickness 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, incl Longitudinal 74.0 63.0 9 Long Trans. 73.0 61.0 4 Over 2 to 3, incl Longitudinal 73.0 61.0 9 Long Trans. 71.0 59.0 4 Short Trans. 69.0 58.
28、0 3 Over 3 to 4, incl Longitudinal 71.0 60.0 8 Long Trans. 70.0 58.0 3 Short Trans. 68.0 57.0 2 Over 4 to 5, incl Longitudinal 69.0 58.0 7 Long Trans. 68.0 56.0 3 Short Trans. 66.0 56.0 2 Over 5 to 6, incl Longitudinal 68.0 56.0 6 Long Trans. 66.0 55.0 3 Short Trans 65.0 55.0 2 TABLE 4B - Minimum Te
29、nsile 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, incl Longitudinal 510 434 9 Long Trans. 503 421 4 Over 51 to 76, incl Longitudinal 503 421 9 Long Tra
30、ns. 490 407 4 Short Trans. 476 400 3 Over 76 to 102, incl Longitudinal 490 414 8 Long Trans. 483 400 3 Short Trans. 469 393 2 Over 102 to 127, incl Longitudinal 476 400 7 Long Trans. 469 386 3 Short Trans. 455 386 2 Over 127 to 152, incl Longitudinal 469 386 6 Long Trans. 455 379 3 Short Trans. 448
31、379 2 SAE - 6 - AMS 4126C AMS 4126C 3.3.1.1.3 Rolled Rings: Specimens machined from rings with axis of specimen approximately tangential to the ring OD (axis parallel to direction of rolling) or with axis approximately parallel to the axis of the ring (transverse to direction of rolling) shall have
32、the properties shown in Table 5. TABLE 5A - Minimum Tensile Properties, Inch/Pound Units Nominal Wall 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 , incl Tangential 73.0 62.0 7 Axial 72.0
33、 61.0 3 Over 2 to 3.5, incl Tangential 71.0 60.0 6 Axial 70.0 59.0 3 TABLE 5B - Minimum Tensile Properties, SI Units Nominal Wall 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, incl T
34、angential 503 427 7 Axial 496 421 3 Over 51 to 89, incl Tangential 490 414 6 Axial 483 407 3 3.3.1.1.4 Special Purpose Forgings: Tensile property requirements for specimens cut from special purpose forgings shall be as specified on the drawing or as agreed upon by purchaser and vendor. 3.3.1.1.5 Tes
35、t Specimens: Specimens machined from separately-forged coupons or from forging stock representing the forgings and, in either case, heat treated with the forgings shall have the properties shown in Table 6. TABLE 6 - Minimum Tensile Properties Property Value Tensile Strength Yield Strength at 0.2% O
36、ffset Elongation in 4D 75.0 ksi (517 MPa) 64.0 ksi (441 MPa) 10% 3.3.1.2 Grain Flow: Grain flow of die forgings and rolled rings, except in the areas which contain end grain, shall follow the general contour of the forging or rolled ring, showing no evidence of re-entrant grain flow. SAE - 7 - AMS 4
37、126C AMS 4126C 3.3.2 Stock for Forging or Rolled Rings: When a sample of stock is forged to a test coupon and heat treated in the same manner as forgings and rolled rings, specimens taken from the heat treated coupon shall conform to the requirements of 3.3.1.1.5. If specimens taken from the stock p
38、rior to forging and after heat treatment in the same manner as forgings and rolled rings conform to the requirements of 3.3.1.1.5, the tests shall be accepted as equivalent to tests of a forged coupon. The forging stock supplier, however, shall not be required to use unforged coupons when performing
39、 lot conformance testing. 3.4 Quality: The product, as received by purchaser, shall be uniform in quality and condition, sound, and free from foreign materials and from imperfections detrimental to usage of the product. 3.4.1 When specified, forgings and rolled rings shall be subjected to ultrasonic
40、 inspection in accordance with ASTM B 594 and, unless otherwise specified, shall meet the following requirements of that specification: 3.4.1.1 Die forgings and rolled rings 0.500 to 4.000 inches (12.70 to 101.60 mm), inclusive, in nominal thickness and weighing not over 300 pounds (136 kg) shall me
41、et Class B. 3.4.1.2 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. 3.4.1.3 Acceptance criteria for forgings or rolled rings exceeding the limits of 3.4.1.1 or 3.4.1.2 shall be as agreed upon
42、 by purchaser and vendor. 3.4.2 When specified, forgings and rolled rings shall be subjected to fluorescent penetrant inspection in accordance with ASTM E 1417. Standards for acceptance shall be as agreed upon by purchaser and vendor. 3.5 Tolerances: Forging stock shall conform to all applicable req
43、uirements of ANSI H35.2 or ANSI H35.2M. 4. QUALITY ASSURANCE PROVISIONS: 4.1 Responsibility for Inspection: The vendor of the product shall supply 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 a
44、ny confirmatory testing deemed necessary to ensure that the product conforms to specified requirements. SAE - 8 - AMS 4126C AMS 4126C 4.2 Classification of Tests: 4.2.1 Acceptance Tests: Composition (3.1), tensile properties (3.3.1.1), tolerances (3.5), and, when specified, ultrasonic and fluorescen
45、t penetrant inspection (3.4.1 and 3.4.2) are acceptance tests and, except for composition, shall be performed on each inspection lot. 4.2.2 Periodic Tests: Grain flow of die forgings and rolled rings (3.3.1.2) and tests of stock for forging or rolled rings to determine ability to develop specified p
46、roperties (3.3.2) are periodic tests and shall be performed at a frequency selected by the vendor unless frequency of testing is specified by purchaser. 4.3 Sampling and Testing: Shall be in accordance with AMS 2355. 4.4 Reports: 4.4.1 The vendor of forgings or rolled rings shall furnish with each s
47、hipment a report stating that the product conforms to the chemical composition tolerances, and nondestructive testing inspection, when required and showing numerical results of tests on each inspection lot to determine conformance to the other acceptance test requirements. This report shall include
48、the purchase order number, inspection lot number(s), AMS 4126C, size, and quantity. This report shall also identify the producer, the product form, and the mill produced size. 4.4.2 The vendor of stock for forging or rolled rings shall furnish with each shipment a report stating that the chemical co
49、mposition of the stock conforms to specified requirements. This report shall include the purchase order number, AMS 4126C, size, and quantity. The report shall also identify the producer. 4.5 Resampling and Retesting: Shall be in accordance with AMS 2355. 5. PREPARATION FOR DELIVERY: 5.1 Identification: Shall be as follows: 5.1.1 Forgings and Rolled Rings: In accordance with AMS 2808. 5.1.2 Stock for Forging or Rolled Rings: As agreed upon by purchaser and vendor. SAE - 9 - AMS 4126C AMS 4126C 5.2 Packaging: The product shall be prepared for shipment in accordance with ASTM B
