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 revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2014 SAE International All rights reserved. No part of this p
3、ublication 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 Canada) Tel: +1 724-776-497
4、0 (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/AMS4081J AEROSPACE MATERIAL SPECIFICATION AMS4081 REV. J Issued 1952-06 Revised 2
5、008-06 Reaffirmed 2014-04 Superseding AMS4081H Aluminum Alloy Tubing, Hydraulic, Seamless, Drawn, Round 1.0Mg - 0.60Si - 0.28Cu - 0.20Cr (6061-T4) Solution Heat Treated and Naturally Aged (Composition similar to UNS A96061) RATIONALE AMS4081J has been reaffirmed to comply with the SAE five-year revi
6、ew policy. 1. SCOPE 1.1 Form This specification covers an aluminum alloy in the form of seamless, round tubing. 1.2 Application This tubing has been used typically for aircraft hydraulic systems and fuel and oil lines to be formed in the solution heat treated condition and subsequently precipitation
7、 heat treated, 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 document to the extent specified herein. The supplier may work to a subsequent revision of a document unless a s
8、pecific 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 15096-0001, Tel: 8
9、77-606-7323 (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 Alloy Raw Materia
10、ls AS1990 Aluminum Alloy Tempers SAE INTERNATIONAL AMS4081J Page 2 of 7 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 660 Packaging/Packing of Aluminum and Magnesium Products AS
11、TM B 666 Identification Marking of Aluminum Products ASTM E 215 Standardizing Equipment for Electromagnetic Testing of Seamless Aluminum-Alloy Tube 2.3 ANSI Publications Available from American National Standards Institute, 25 West 43rd Street, New York, NY 10036-8002, Tel: 212-642-4900, www.ansi.or
12、g. 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 as shown in Table 1, determined in accordance with AMS2355. TABLE 1 - COMPOSITIO
13、N Element min maxSilicon Iron Copper Manganese Magnesium Chromium Zinc Titanium Other Elements, each Other Elements, total Aluminum 0.40 - 0.15 - 0.8 0.04 - - - - remainder0.8 0.7 0.400.151.2 0.350.250.150.050.153.2 Condition Solution heat treated in accordance with AMS2772 and naturally aged. 3.2.1
14、 Tubing shall be supplied unground with an as-drawn surface finish, unless otherwise specified by purchaser. SAE INTERNATIONAL AMS4081J Page 3 of 7 3.3 Properties Tubing shall conform to the following requirements, determined in accordance with AMS2355 on the mill produced size, except as specified
15、in 3.4.3.2: 3.3.1 As Solution Heat Treated and Naturally Aged 3.3.1.1 Tensile Properties Shall be as specified in Table 2: TABLE 2A - MINIMUM TENSILE PROPERTIES, INCH/POUND UNITS Nominal Wall Thickness Inch Tensile Strength ksi Yield Strength at 0.2% Offset ksi Elongation in 2 Inches or 4D Cut Out S
16、pecimen % Elongation in 2 Inches or 4D Full Section Specimen % 0.025 to 0.049, incl Over 0.049 to 0.259, incl Over 0.259 to 0.500, incl 30.0 30.0 30.0 16.0 16.0 16.0 14 16 18 16 18 20 TABLE 2B - MINIMUM TENSILE PROPERTIES, SI UNITS Nominal Wall Thickness Millimeters Tensile Strength MPa Yield Streng
17、th at 0.2% Offset MPa Elongation in 50.8 mm or 4D Cut Out Specimen % Elongation in 50.8 mm or 4D Full Section Specimen % 0.64 to 1.24, incl Over 1.24 to 6.58, incl Over 6.58 to 12.70, incl 207 207 207 110 110 110 14 16 18 16 18 20 3.3.1.2 Flattening Tubing having nominal wall thickness less than 10%
18、 of the nominal OD shall withstand, without cracking, flattening sideways under a load applied gradually at room temperature until the outside dimension under load is equal to six times the nominal wall thickness. Tubing having nominal wall thickness 10% or more of the nominal OD shall withstand, wi
19、thout cracking, flattening sideways under a load applied gradually at room temperature until the outside dimension under load equals 90% of the nominal OD. 3.3.1.2.1 If tubing does not pass the flattening test of 3.3.1.2, a section of tube not less than 1/2 inch (12.7 mm) in length and including one
20、-third to one-half the circumference of the tube shall withstand, without cracking, bending at room temperature through an angle of 180 degrees around a mandrel having a diameter equal to four times the nominal wall thickness of the tubing with axis of bend parallel to axis of tube and with inside o
21、f tube on inside of bend. 3.3.1.3 Flarability Specimens as in 4.3.1 from tubing 0.375 inch (9.52 mm) and under in nominal OD shall withstand being double-flared (See 8.2) and from tubing over 0.375 inch (9.52 mm) in nominal OD shall withstand being single-flared without formation of cracks or other
22、visible defects by being forced axially, at room temperature, with steady pressure over a hardened and polished tapered steel pin having a 74-degree included angle to produce a flare having a permanent expanded OD not less than that specified in Table 3. SAE INTERNATIONAL AMS4081J Page 4 of 7 TABLE
23、3A - FLARABILITY REQUIREMENTS, INCHES Nominal OD Inch Expanded OD Inch Nominal OD Inches Expanded OD Inches 0.125 0.188 0.250 0.312 0.375 0.500 0.625 0.200 0.302 0.359 0.421 0.484 0.656 0.781 0.750 1.000 1.250 1.500 1.750 2.000 2.500 3.000 0.937 1.187 1.500 1.721 2.106 2.356 2.856 3.356 TABLE 3B - F
24、LARABILITY REQUIREMENTS, SI UNITS Nominal OD Millimeters Expanded OD Millimeters Nominal OD Millimeters Expanded OD Millimeters 3.18 4.78 6.35 7.92 9.52 12.70 15.88 5.08 7.67 9.12 10.69 12.29 16.66 19.84 19.05 25.40 31.75 38.10 44.45 50.80 63.50 76.20 23.80 30.15 38.10 43.71 53.49 59.84 72.54 85.24
25、3.3.1.3.1 Tubing with nominal OD between any two standard sizes shown in Table 3 shall take the same percentage flare as shown for the larger of the two sizes. 3.3.1.4 Hydraulic Strength Tubing shall withstand an internal hydrostatic pressure (P), based on Equation 1, without developing leaks and wi
26、thout an increase in mean diameter of more than 0.2%. 2222dDdDSP+= (Eq. 1) where: S = 16.0 ksi (110 MPa) D = Maximum OD (nominal OD plus tolerance) d = Maximum ID (D minus twice the minimum wall thickness) 3.3.1.4.1 Mean diameter is the average of two diameters at right angles to each other in the s
27、ame transverse plane; measurements before and after testing should be taken at substantially the same location. SAE INTERNATIONAL AMS4081J Page 5 of 7 3.3.2 Response to Precipitation Heat Treatment to T62 Temper (See AS1990). Tubing shall have the properties specified in Table 4 after being precipit
28、ation heat treated in accordance with AMS2772. TABLE 4A - MINIMUM TENSILE PROPERTIES, INCH/POUND UNITS Nominal Wall Thickness Inch Tensile Strength ksi Yield Strength at 0.2% Offset ksi Elongation in 2 Inches or 4D Cut Out Specimen % Elongation in 2 Inches or 4D Full Section Specimen % 0.025 to 0.04
29、9, incl Over 0.049 to 0.259, incl Over 0.259 to 0.500, incl 42.0 42.0 42.0 35.0 35.0 35.0 8 10 12 10 12 14 TABLE 4B - MINIMUM TENSILE PROPERTIES, SI UNITS Nominal Wall Thickness Millimeters Tensile StrengthMPa Yield Strength at 0.2% Offset MPa Elongation in 50.8 mm or 4D Cut Out Specimen % Elongatio
30、n in 50.8 mm or 4D Full Section Specimen % 0.64 to 1.24, incl Over 1.24 to 6.58, incl Over 6.58 to 12.70, incl 290 290 290 241 241 241 8 10 12 10 12 14 3.4 Quality Tubing, as received by purchaser, shall be uniform in quality and condition, sound, and free from foreign materials and from imperfectio
31、ns detrimental to usage of the tubing. 3.4.1 Microexamination A polished and etched cross-section of a tube from each lot shall show no evidence of cracks, seams, or folds when examined at 100X magnification. 3.4.2 Detrimental imperfections include, but are not limited to, cracks, splits, seams, inc
32、lusions, or severe cross-hatching (surface breaks) that cannot be removed by light hand sanding, using 180 grit or finer sandpaper. 3.4.3 Leak Test Each length of tubing shall be tested for leaks in accordance with either 3.4.3.1 or 3.4.3.2; the method of test shall be at the option of the vendor un
33、less purchaser specifies the method of test. 3.4.3.1 Immersion Test A tube, immersed in water or other suitable liquid while an air pressure of 250 psi (1724 kPa) is applied to the inside of the tube and held for not less than five seconds, shall show no leakage as indicated by bubbles in the immers
34、ion fluid. 3.4.3.2 Eddy Current Test Secondary reference standards in accordance with ASTM E 215 shall be used to set threshold levels. Tubes exhibiting eddy current responses equivalent to or smaller than those obtained from the daholes are acceptable. Tubes exhibiting eddy current responses equiva
35、lent to or greater than those obtained from the dbholes in the reference standard are not acceptable. 3.4.4 Prior to use, tubing should be cleaned and chemically film treated to increase the corrosion resistance. Metallic flakes or particles shall not be collected by a clean white cloth drawn throug
36、h the length of the bore of a test sample. Discoloration of the cloth without the presence of flakes or particles is acceptable. SAE INTERNATIONAL AMS4081J Page 6 of 7 3.5 Tolerances Tubing shall conform to all applicable requirements of ANSI H35.2 or ANSI H35.2M. 4. QUALITY ASSURANCE PROVISIONS 4.1
37、 Responsibility for Inspection The vendor of tubing 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 any confirmatory testing deemed necessary to ensure that the tubing conforms to spe
38、cified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Composition (3.1), tensile properties as solution heat treated (3.3.1.1), flarability (3.3.1.3), microexamination (3.4.1), leak determination (3.4.3), and tolerances (3.5) are acceptance tests and, except for composition, shall
39、be performed on each lot. 4.2.2 Periodic Tests Flattening (3.3.1.2), hydraulic strength (3.3.1.4), and tensile properties after precipitation heat treatment (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.
40、4.3 Sampling and Testing Shall be in accordance with AMS2355 and the following: 4.3.1 Specimens for flarability test (3.3.1.3) shall be full tubes or sections cut from a tube. The end of the specimen to be flared shall be cut square, with the cut end smooth and free from burrs but, not rounded. 4.4
41、Reports The vendor of tubing shall furnish with each shipment a report stating that the tubing conforms to the chemical composition and tolerances (and NDT inspection, when required); and showing the numerical results of tests on each inspection lot to determine conformance to the other acceptance t
42、est requirements and periodic test requirements when performed. This report shall include the purchase order number, inspection lot number(s), AMS4081J, size, and quantity. The report shall also identify the producer, the product form, and the size of the mill product. 4.5 Resampling and Retesting S
43、hall 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 5.2.1 When specified, tubing shall be coated, prior to shipment, with a light corrosion-inhibiting oil. SAE INTERNATIONAL AMS4081J Page 7 of 7 5.2.2 Tubing
44、shall be prepared for shipment in accordance with commercial practice and in compliance with applicable rules and regulations pertaining to the handling, packaging, and transportation of the tubing to ensure carrier acceptance and safe delivery. 5.2.3 Packaging shall be in accordance with ASTM B 660
45、. 6. ACKNOWLEDGMENT A vendor shall include this specification number and its revision letter in all quotations and when acknowledging purchase orders. 7. REJECTIONS Tubing not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection. 8. NOTES 8.1 A
46、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 specification. An (R) symbol to the left of the document title indicates a complete revision of the specificat
47、ion, including technical revisions. Change bars and (R) are not used in original publications, nor in specifications that contain editorial changes only. 8.2 Terms used in AMS are clarified in ARP1917 and as follows: 8.2.1 A double flare is similar to a standard single flare except the flare is fold
48、ed back on itself such that the cut edge is inside the flare, near the ID of the tube. Definition and illustration of single flaring is shown in MS 33584; double flaring is defined and illustrated in MS 33583. 8.3 Dimensions and properties in inch/pound units and the Fahrenheit temperatures are prim
49、ary; 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. 8.4 Purchase documents should specify not less than the following: AMS4081J Size of tubing required Quantity of tubing required. 8.5 Similar Specifications AMS-T-7081 is listed for information only and shall not be construed as an acceptable alternate unless al
