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/AMS4845JAEROSPACEMATERIAL SPECIFICATIONAMS4845 REV. JIssued 1939-12Noncurrent 1996-09Revised
5、2015-12Superseding AMS4845HTin Bronze Castings, Sand and Centrifugal87.5Cu - 10Sn - 2ZnAs Cast(Composition similar to UNS C90500)RATIONALEAMS4845J corrects an error in the tensile elongation requirement (Table 2) and is a Five Year Review and update of this specification.1. SCOPE1.1 FormThis specifi
6、cation covers a tin bronze in the form of sand and centrifugal castings.1.2 ApplicationThese castings have been used typically for bearings requiring a combination of strength, toughness, and resistance to wear, but usage is not limited to such applications. The alloy has good machinability and corr
7、osion resistance to sea water.2. APPLICABLE DOCUMENTSThe 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 document unless a specific document issue is sp
8、ecified. 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 PublicationsAvailable from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Ca
9、nada) or +1 724-776-4970 (outside USA), www.sae.org.2.1.1 Aerospace Material SpecificationsAMS2694 In-Process Welding of CastingsAMS2804 Identification CastingsSAE INTERNATIONAL AMS4845J Page 2 of 52.2 ASTM PublicationsAvailable from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Con
10、shohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org.ASTM E8/E8M Tension Testing of Metallic MaterialsASTM E18 Rockwell Hardness of Metallic MaterialsASTM E478 Chemical Analysis of Copper AlloysASTM E1220 Visible Penetrant Testing Using Solvent-Removable ProcessASTM E1417/E1417M Liquid Penetran
11、t TestingASTM E1742/E1742M Radiographic Examination3. TECHNICAL REQUIREMENTSCompositionShall conform to the following percentages by weight shown in Table 1, determined by wet chemical methods in accordance with ASTM E478, by spectrochemical methods, or by other analytical methods acceptable to purc
12、haser:Table 1 - CompositionElement min maxCopper (3.1.1)TinZincNickelLeadAntimonyIronPhosphorusSulfurAluminumSiliconCopper + Sum of Named Elements (3.1.1)86.09.01.0-99.489.011.03.01.00.300.200.200.050.050.0050.005-3.1.1 In determining copper content, copper may be calculated as copper plus nickel.3.
13、2 ConditionAs cast.3.3 CastingCastings shall be produced in lots from metal conforming to 3.1. A lot shall be all castings produced from one furnace melt or crucible melt. When two or more furnace melts or crucible melts or combination thereof are used to charge a ladle for pouring, the castings the
14、refrom shall constitute a lot. A lot shall be not more than 2000 pounds (900 kg) of castings.3.4 Test Specimens3.4.1 Chemical Analysis SpecimensShall be cast from each melt and be of any convenient size, shape, and form.SAE INTERNATIONAL AMS4845J Page 3 of 53.4.2 Tensile SpecimensShall conform to AS
15、TM E8/E8M and shall be poured from each melt.3.5 PropertiesCastings shall conform to the following requirements:3.5.1 Tensile PropertiesShall be shown in Table 2, determined in accordance with ASTM E8/E8M on separately-cast specimens produced as in 3.4.2:Table 2 - Minimum tensile propertiesProperty
16、ValueTensile StrengthYield Strength at 0.2% OffsetElongation in 4D40.0 ksi (275 MPa)18.0 ksi (125 MPa)20%3.5.2 HardnessShall be as follows, determined in accordance with ASTM E18:3.5.2.1 Sand CastingsNot lower than 70 HRF, or equivalent.3.5.2.2 Centrifugal CastingsNot lower than 80 HRF, or equivalen
17、t.3.6 Quality3.6.1 Castings, 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.3.6.1.1 Castings shall have smooth surfaces and shall be well cleaned.3.6.2 Castings, when specified, s
18、hall be produced under radiographic control. This control shall consist of radiographic examination of castings in accordance with ASTM E1742/E1742M until proper foundry technique, which will produce castings free from harmful internal imperfections, is established for each part number and of produc
19、tion castings as necessary to ensure maintenance of satisfactory quality.3.6.3 Castings, when specified, shall be subjected to fluorescent penetrant testing in accordance with ASTM E1417/E1417M.3.6.4 Radiographic, fluorescent penetrant, and other quality standards shall be as agreed upon by purchase
20、r and vendor.3.6.5 Castings shall not be peened, plugged, impregnated or welded unless authorized by purchaser.3.6.5.1 When permitted in writing by purchaser, castings may be welded in accordance with AMS2694.SAE INTERNATIONAL AMS4845J Page 4 of 54. QUALITY ASSURANCE PROVISIONS4.1 Responsibility for
21、 InspectionThe vendor of castings 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 castings conform to specified requiremen
22、ts.4.2 Classification of TestsTests to determine conformance to all technical requirements of this specification are classified as acceptance tests and as preproduction tests and shall be performed prior to or on the first-article shipment of a casting to a purchaser, on each melt or lot, as applica
23、ble, when a change in material, processing, or both requires reapproval as in 4.4.2, and when purchaser deems confirmatory testing to be required.4.3 Sampling and Testing4.3.1 One chemical analysis specimen in accordance with 3.4.1 from each melt or a casting from each lot.4.3.2 Three separately-cas
24、t tensile specimens in accordance with 3.4.2 from each melt.4.3.3 Two preproduction castings in accordance with 4.4.1 of each part number.4.4 Approval4.4.1 Sample castings from new or reworked patterns or molds and the casting procedure shall be approved by purchaser before castings for production u
25、se are supplied, unless such approval be waived by purchaser.4.4.2 Vendor shall establish, for production of sample castings of each part number, parameters for the process control factors which will produce acceptable castings; these shall constitute the approved casting procedure and shall be used
26、 for producing production castings. If necessary to make any change in parameters for the process control factors, vendor shall submit for reapproval a statement of the proposed changes in processing and, when requested, sample castings, test specimens, or both. Production castings incorporating the
27、 revised operations shall not be shipped prior to receipt of reapproval.4.4.2.1 Control factors for producing castings include, but are not limited to, the following:Type of furnaceFurnace atmosphereFluxing or deoxidation procedureGating and risering practicesMetal pouring temperature; variation of
28、50 F (30 C) from the established limit is permissibleMold rotational speed for centrifugal castingsSolidification and cooling proceduresCleaning operationsMethods of inspection.4.4.2.1.1 Any of the above process control factors for which parameters are considered proprietary by the vendor may be ass
29、igned a code designation. Each variation in such parameters shall be assigned a modified code designation.4.5 Reports4.5.1 The vendor of castings shall furnish with each shipment a report showing the results of tests for chemical composition of at least one casting or of separately-cast specimens fr
30、om each melt and for tensile properties and hardness of each lot. This report shall include the purchase order number, lot number, AMS4845J, part number, and quantity.SAE INTERNATIONAL AMS4845J Page 5 of 54.6 Resampling and RetestingIf any specimen used in the above tests fails to meet the specified
31、 requirements, disposition of the castings may be based on the results of testing two additional specimens for each original nonconforming specimen. Failure of any retest specimen to meet the specified requirements shall be cause for rejection of the castings represented and no additional testing sh
32、all be permitted. Results of all tests shall be reported.5. PREPARATION FOR DELIVERY5.1 IdentificationShall be in accordance with AMS2804.5.2 Packaging5.2.1 Castings shall be prepared for shipment in accordance with commercial practice and in compliance with applicable rules and regulations pertaini
33、ng to the handling, packaging, and transportation of the castings to ensure carrier acceptance and safe delivery.6. ACKNOWLEDGMENTA vendor shall mention this specification number and its revision letter in all quotations and when acknowledging purchase orders.7. REJECTIONSCastings not conforming to
34、this specification, or to modifications authorized by purchaser, will be subject to rejection.8. NOTES8.1 Revision IndicatorA 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 previou
35、s issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only.8.2 Dimensions and properties in inc
36、h/pound units and the Fahrenheit temperatures are primary; 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.8.3 Purchase documents should specify not less than the following:AMS4845
37、JType and part number or pattern or mold number of castings desiredQuantity of castings desiredType of nondestructive testing required and standards for acceptance (see 3.6.4)Similar Specifications.ASTM B584 Sand Castings and ASTM B271/B271M Centrifugal Castings for Alloy C90500 are listed for information only and shall not be construed as an acceptable alternate unless all requirements of this AMS are met.PREPARED BY AMS COMMITTEE “D“
