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 theref
2、rom, 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 2015 SAE InternationalAll rights reserved. No part of this publi
3、cation 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: +1 724-776-4970 (out
4、side USA)Fax: 724-776-0790Email: CustomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedbackon this Technical Report, please visithttp:/www.sae.org/technical/standards/AMS4241EAEROSPACEMATERIAL SPECIFICATIONAMS4241 REV. EIssued 1986-07Reaffirmed 2007-04Revised
5、2015-12Superseding AMS4241DAluminum Alloy Castings7.0Si - 0.58Mg - 0.15Ti - 0.06Be (D357.0-T6)Solution and Precipitation Heat TreatedDendrite Arm Spacing (DAS) Controlled(Composition similar to UNS A43570)RATIONALEAMS4241E removes non-referenced standards from 2.2, and is a Five Year Review and upda
6、te of this specification.1. SCOPE1.1 FormThis specification covers an aluminum alloy in the form of castings.1.2 ApplicationThese castings have been used typically for structural aircraft components (see 8.3) requiring DAS quality control, but usage is not limited to such applications.1.3 Safety - H
7、azardous MaterialsWhile the materials, methods, applications, and processes described or referenced in this specification may involve the use of hazardous materials, this specification does not address the hazards which may be involved in such use. It is the sole responsibility of the user to ensure
8、 familiarity with the safe and proper use of any hazardous materials and to take necessaryprecautionary measures to ensure the health and safety of all personnel involved.2. APPLICABLE DOCUMENTSThe issue of the following documents in effect on the date of the purchase order forms a part of this spec
9、ification 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 superseding document has been specified, the last published issue of that document shall apply.
10、SAE INTERNATIONAL AMS4241E Page 2 of 102.1 SAE PublicationsAvailable 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.AMS2360 Room Temperature Tensile Properties of CastingsAMS2694 In-Pr
11、ocess Welding of CastingsAMS2771 Heat Treatment of Aluminum Alloy CastingsAMS2804 Identification CastingsAMS4246 Aluminum Alloy, Welding Wire, 7.0Si - 0.52Mg (357)AMS2175 Castings, Classification and Inspection of ARP1947 Dendrite Arm Spacing of Structural Aircraft Quality D357 Aluminum Alloy Castin
12、gs, Determination and Acceptance of 2.2 ASTM PublicationsAvailable from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org.ASTM B557 Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy ProductsASTM E29 Using Signific
13、ant Digits in Test Data to Determine Conformance with SpecificationsASTM E34 Chemical Analysis of Aluminum- and Aluminum-Base AlloysASTM E155 Reference Radiographs for Inspection of Aluminum and Magnesium CastingsASTM E607 Atomic Emission Spectrometric Analysis Aluminum Alloys by the Point-to-Plane
14、Technique, Nitrogen AtmosphereASTM E716 Sampling Aluminum and Aluminum Alloys for Spectrochemical AnalysisASTM E1251 Analysis of Aluminum and Aluminum Alloys by Atomic Emission SpectrometryASTM E1417/E1417M Liquid Penetrant TestingASTM E1742/E1742M Radiographic Examination2.3 AIA PublicationsAvailab
15、le from Aerospace Industries Association, 1000 Wilson Boulevard, Suite 1700, Arlington, VA 22209-3928, Tel: 703-358-1000, www.aia-aerospace.org.NAS 823 Cast Surface Comparison StandardSAE INTERNATIONAL AMS4241E Page 3 of 103. TECHNICAL REQUIREMENTS3.1 CompositionShall conform to the percentages by w
16、eight shown in Table 1, determined by wet chemical methods in accordance with ASTM E34, by spectrochemical methods in accordance with ASTM E607 or ASTM E1251, or by other analytical methods acceptable to purchaser (see 3.4.1).Table 1 - CompositionElement min maxSilicon 6.5 7.5Iron - 0.12Manganese -
17、0.10Magnesium 0.55 0.6Titanium 0.10 0.20Beryllium 0.04 0.07Other Impurities, each - 0.05Other Impurities, total - 0.15Aluminum remainder3.1.1 Test results may be rounded by the “rounding off” method of ASTM E29.3.2 ConditionSolution and precipitation heat treated to T6 condition.3.3 CastingCastings
18、shall be produced from metal conforming to 3.1, determined by analysis of a specimen (3.4.1) cast after the last melt addition.3.4 Cast Test SpecimensChemical analysis specimens and tensile specimens shall be cast as follows:3.4.1 Chemical Analysis SpecimensShall be cast from each melt after the las
19、t melt addition and shall be tested to qualify the melt as in 3.1. Spectrochemical sample shall be prepared in accordance with ASTM E716.3.4.2 Integrally-Attached CouponsUnless otherwise specified, at least two coupons shall be integrally-attached to each casting. The two coupons shall represent a v
20、ariation of size of dendrite arm spacing (DAS). The chilled coupon exhibiting a small DAS shall be identified as coupon “A“; the unchilled coupon of large DAS shall be identified as coupon “B“. These coupons shall be tested for tensile property determination specified in 3.6.1 and microstructure eva
21、luation specified in 3.6.2. Additional coupons may be added for retest and for foundry purposes at the option of the foundry.3.4.2.1 Location and size of integrally-attached coupons are optional with the following exceptions:3.4.2.1.1 The coupons shall be flat and at least large enough to permit exc
22、ision of a sub-size round tensile specimen of 0.250 inch (6.35 mm) diameter conforming to ASTM B557 with a gage length of 1 inch (25 mm).3.4.2.1.2 The coupons shall be located in such a manner as to avoid any interference with inspection tooling.3.4.2.2 The two coupons shall be produced with varying
23、 solidification rates to develop a minimum DAS size difference of 0.0010 inch (0.025 mm) within a tensile strength range of 47.0 to 57.0 ksi (324 to 393 MPa).SAE INTERNATIONAL AMS4241E Page 4 of 103.4.2.3 The radiographic quality of the coupons shall meet the requirements for designated areas of Tab
24、le 2.3.4.2.4 Removal and testing of integrally-attached coupons for casting acceptance shall be performed by a testing facility acceptable to purchaser. 3.4.2.5 A linear plot shall be made from ultimate tensile strength results of coupons A and B relative to DAS. This will give the needed DAS to mee
25、t the tensile requirements of 3.6.1.3.5 Heat TreatmentShall be in accordance with AMS2771 except as specified in 3.5.1 and 3.5.2.3.5.1 The solution heat treat temperature shall be 1010 F 10 F (543 C 6 C).3.5.2 The quenching and precipitation heat treating procedure shall be established to develop th
26、e required casting properties.3.6 PropertiesCastings and integrally-attached chilled coupon “A“ shall conform to the following requirements:3.6.1 Tensile PropertiesShall be as follows, determined in accordance with ASTM B557. Properties in 3.6.1.1 and 3.6.1.2, as applicable (see 4.3.1.2 and 4.3.1.3)
27、, shall be the basis for acceptance of castings:3.6.1.1 Integrally-Attached Chilled Coupon “A“Specimens as in 4.3.1.3 shall have the properties shown in Table 2.Table 2 - Tensile propertiesProperty ValueTensile Strength, minimum 51.0 ksi (352 MPa)Yield Strength at 0.2% Offset 42.0 to 47.0 ksi(290 to
28、 324 MPa)3.6.1.2 Specimens Cut from CastingsSpecimens as in 4.3.1.2 shall have the properties in Table 3 or Table 4.Table 3 - Minimum tensile properties for designated areas of castingsProperty ValueTensile Strength 50.0 ksi (345 MPa)Yield Strength at 0.2% Offset 40.0 ksi (276 MPa)Elongation in 4D (
29、see 3.6.1.2.2) 3%Table 4 - Minimum tensile properties for casting areas other than designated areasProperty ValueTensile Strength 45.0 ksi (310 MPa)Yield Strength at 0.2% Offset 36.0 ksi (248 MPa)Elongation in 4D (see 3.6.1.2.2) 2%SAE INTERNATIONAL AMS4241E Page 5 of 103.6.1.2.1 When properties othe
30、r than those of Tables 3 or 4 are required, tensile specimens taken from locations indicated on the drawing, from a casting or castings chosen at random to represent the lot, shall have the properties indicated on the drawing for such specimens. Property requirements may be designated in accordance
31、with AMS2360.3.6.1.2.2 Specimens cut from castings shall be subsize and proportional to the standard round or sheet- type specimens defined in ASTM B557. For sheet-type specimens, elongation shall be measured based on a gage length of 4.5 times cross-sectional area.3.6.2 MicrostructureThe microstruc
32、ture of the casting surface in purchaser designated areas of the casting shall not exceed the maximum permissible DAS, determined in accordance with ARP1947 and results from tests of coupons A and B. Castings which exhibit an unacceptable microstructure shall be held for disposition by purchasers co
33、gnizant engineering personnel.Castings shall not be rejected, however, if the requirements of 3.6.1.2 are met.3.7 QualityCastings, 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 castings.3
34、.7.1 Castings shall have a surface finish in accordance with the engineering drawing and shall be well cleaned. NAS 823 may be used to specify surface finish acceptance criteria.3.7.2 Castings shall be produced under radiographic control. This control shall consist of 100% radiographic examination o
35、f castings until process control factors (see 4.4.2) have been established to ensure production of acceptable castings.3.7.3 Radiographic examination shall be performed on each casting in accordance with ASTM E1742/E1742M or to a sampling plan when specified by purchaser. A “Casting Class” of AMS217
36、5 may be selected to specify the frequency of examination. Type 1 radiographic film shall be used, and a maximum unsharpness value of 0.003 inch (0.08 mm) and equivalent penetrameter sensitivity of 1% shall be maintained. Radiographic acceptance standards shall be in accordance with Table 5, or as s
37、pecified by purchaser.Table 5 - Radiographic requirementsDiscontinuitiesRadiographReferenceDesignatedAreasOtherAreasGas holes 1.1 1 2Gas porosity (round) 1.21 1 3Gas porosity (elongated) 1.22 1 3Shrinkage cavity 2.1 1 2Shrinkage porosity or sponge 2.2 1 2Foreign material (less dense) 3.11 1 2Foreign
38、 material (more dense) 3.12 1 2Segregation - none noneCracks - none noneCold shuts - none noneLaps - none noneMaximum acceptance discontinuities in aluminum alloy castings (maximum permissible radiograph) in accordance with ASTM E155.3.7.3.1 When two or more types of discontinuities are present to a
39、n extent equal to or not significantly better than the acceptance standards for respective discontinuities, the parts shall be rejected.3.7.3.2 When two or more types of discontinuities are present and the predominating discontinuity is not better than the acceptance standard, the part shall be revi
40、ewed for disposition by the cognizant engineering personnel.SAE INTERNATIONAL AMS4241E Page 6 of 103.7.3.3 Gas holes or sand spots and inclusions of the maximum size allowed by Table 5 shall be cause for rejection when closer than twice their maximum dimension to an edge or extremity of a casting.3.
41、7.4 Each casting shall be subjected to fluorescent penetrant testing in accordance with ASTM E1417/E1417M,sensitivity Level 2.3.7.4.1 Linear indications, cold shuts, cracks, and seams are not acceptable.3.7.4.2 Surface porosity is not acceptable if the individual pores are closer than twice their ma
42、ximum dimension to an edge or extremity of the casting or the pores form a linear indication, i.e., three or more are in a line and the distance between any two indications is less than twice the maximum dimension of either adjacent indication.3.7.4.3 Any individual indication which is three times l
43、onger than it is wide shall be considered a linear indication and is not acceptable.3.7.5 Castings shall not be peened, plugged, impregnated, or welded unless authorized by purchaser.3.7.5.1 When authorized by purchaser, welding with AMS4246 alloy filler metal in accordance with AMS2694 or other wel
44、ding program approved by purchaser may be used.4. QUALITY ASSURANCE PROVISIONS4.1 Responsibility for InspectionThe vendor of castings shall supply all samples for vendors tests and shall be responsible for the performance of all required tests. All testing shall be performed at facilities acceptable
45、 to purchaser. Purchaser reserves the right to sample and to perform any confirmatory testing deemed necessary to ensure that the castings conform to specified requirements.4.2 Classification of Tests4.2.1 Acceptance TestsComposition (3.1), tensile properties of integrally-attached coupons (3.6.1.1)
46、, tensile properties of specimens cut from castings (3.6.1.2), and quality (3.7) are acceptance tests and shall be performed on each casting, melt, or heat treat lot as applicable under 4.3.4.2.2 Periodic TestsMicrostructure (3.6.2) is a periodic test and shall be performed at a frequency selected b
47、y the vendor unless frequency of testing is specified by purchaser.4.2.3 Preproduction TestsAll technical requirements are preproduction tests and shall be performed on the first-article shipment of a casting to a purchaser, when a change in material and/or processing requires reapproval as in 4.4.2
48、, and when purchaser deems confirmatory testing to be required.4.3 Sampling and TestingShall be in accordance with the following:4.3.1 For Acceptance Tests4.3.1.1 One chemical analysis specimen in accordance with 3.4.1 from each melt.SAE INTERNATIONAL AMS4241E Page 7 of 104.3.1.2 Destructive testing
49、 of castings for evaluation of specimens cut from castings in accordance with 3.6.1.2.2 shall be performed as follows:4.3.1.2.1 First 30 Castings ReceivedOne casting from each 10 production castings shall be selected for destructive testing.4.3.1.2.2 Castings Received ThereafterIf no failure occurs in 4.3.1.2.1, one casting from each 25 production castings consecutively received thereafter. If a failure occurs, the test
