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 2012 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/AMS4800E AEROSPACE MATERIAL SPECIFICATION AMS4800 REV. E Issued 1940-01 Revised 2
5、006-10 Reaffirmed 2012-02 Superseding AMS4800D Bearings, Babbitt 91Sn - 4.5Sb - 4.5Cu (Composition similar to UNS L13910) RATIONALE AMS4800E has been reaffirmed to comply with the SAE five-year review policy. 1. SCOPE 1.1 Form This specification covers bearings of a tin alloy cast on one or both fac
6、es of a steel or bronze backing. 1.2 Application Primarily for bearings, bushings, and sleeves. 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 herein. The supplier may work to a subse
7、quent 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 from SAE International, 400 Commonwealth D
8、rive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. AMS 2800 Identification, Finished Parts 3. TECHNICAL REQUIREMENTS 3.1 Composition 3.1.1 Babbitt Shall conform to the percentages by weight shown in Table 1, determined by spectroche
9、mical methods or by other analytical methods acceptable to purchaser. SAE AMS4800E Page 2 of 5 Element min max Antimony 4.0 5.0 Copper 5.0 Lead - 0.50 Arsenic - 0.10 Iron - 0.08 Bismuth - 0.08 Zinc - 0.005 Aluminum - 0.005 Other Elements, total - 0.20 Tin remainder3.1.1.1 For bearings purchased in t
10、he finish machined condition, samples of babbitt for chemical analysis shall be taken between the surface and a point midway between the babbitt surface and the bond of the babbitt and backing. For bearings purchased in the as-cast condition, samples of babbitt for chemical analysis shall be taken f
11、rom the melt at the time of pouring. 3.1.2 Backing Shall be as specified on the drawing or purchase order. Where steel is specified, low carbon steel shall be supplied unless another steel is specified. 3.2 Condition Shall be a composite material produced by casting babbitt metal onto one or both fa
12、ces of the specified backing. 3.3 Properties Bearings shall conform to the following requirements: 3.3.1 Cladding Structure Shall be free from excessive segregation. Purchaser may specify metallographic, macroetch, or other acceptance standards. 3.3.2 Bonding Cladding shall be firmly and continuousl
13、y bonded to the backing material, determined by a procedure agreed upon by purchaser and vendor. Where no procedure is agreed upon, destructive examination with a chisel or similar tool shall show no more than 5% of the clad area to be unbonded. 3.3.3 Babbitt Thickness Shall meet drawing requirement
14、s. 3.4 Quality Bearings, as received by purchaser, shall be uniform in quality and condition, sound, smooth, and free from foreign materials and from imperfections detrimental to usage of the bearings. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The vendor of bearings shall sup
15、ply 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 bearings conform to specified requirements. TABLE 1 - COMPOSITION SAE AMS4800E Page
16、 3 of 5 4.2 Classification of Tests Tests for all technical requirements are acceptance tests and preproduction tests and shall be performed prior to or on the first-article shipment of a bearing to a purchaser, on each heat or lot as applicable, when a change in materials and/or processing requires
17、 reapproval as in 4.4.2, and when purchaser deems confirmatory testing to be required. 4.3 Sampling and Testing Shall be in accordance with the following; a lot shall be all parts of one size and configuration made from a single heat of backing material and a single lot of babbitt processed in one c
18、ontinuous run and presented for vendors inspection at one time. 4.3.1 Backing As agreed upon by purchaser and vendor. 4.3.2 Babbitt One sample from each heat of metal melted at one time taken from a melt or part as applicable. 4.3.3 Bearings 4.3.3.1 Visual 100%. 4.3.3.2 Non-Destructive Test As agree
19、d upon by purchaser and vendor. 4.3.3.3 Destructive Tests One part from each lot. 4.4 Approval 4.4.1 The process and control procedures, or a preproduction sample part, or both, whichever is specified, shall be approved by the cognizant engineering organization before production parts are supplied.
20、4.4.2 The supplier shall make no significant change in materials, processes or controls from those on which the approval was based, unless the change is approved by the cognizant engineering organization. A significant change is one that, in the judgment of the cognizant engineering organization, co
21、uld affect the properties or performance of the parts. 4.4.3 Control factors for the process shall include but not be limited to: Limits on melt composition Pour temperature Backing material Backing material surface condition Backing material temperature (preheat) Rotation speed for centrifugal cast
22、ing Pouring rate Cooling technique Limits on as-cast thickness SAE AMS4800E Page 4 of 5 4.5 Reports The vendor of bearings shall furnish with each shipment a report showing the results of tests for composition and, when agreed upon, cladding structure for each lot. This report shall include the purc
23、hase order number, lot number, applicable specification governing the backing material used, AMS 4800E, part number, and quantity. 4.6 Resampling and Retesting If any part used in the above tests fails to meet the specified requirements, disposition of the parts may be based on the results of testin
24、g three additional parts for each original nonconforming part. Failure of any retest part to meet the specified requirements shall be cause for rejection of the parts represented. Results of all tests shall be reported. 5. PREPARATION FOR DELIVERY 5.1 Identification Bearings shall be identified in a
25、ccordance with AMS 2800. Each container of bearings shall be marked with not less than the following information: BEARINGS, BABBITT AMS 4800E PART NUMBER PURCHASE ORDER NUMBER LOT NUMBER QUANTITY MANUFACTURERS IDENTIFICATION 5.2 Protective Treatment Bearings shall be protected, during shipment and s
26、torage, by coating with a suitable corrosion preventive compound that is readily removable by hydrocarbon solvents or alkaline detergents. 5.3 Packaging 5.3.1 Bearings having different part numbers shall be packaged in separate containers. 5.3.2 Containers of bearings shall be prepared for shipment
27、in accordance with commercial practice and in compliance with applicable rules and regulations pertaining to the handling, packaging, and transportation of the bearings to ensure carrier acceptance and safe delivery. 6. ACKNOWLEDGMENT A vendor shall mention this specification number and its revision
28、 letter in all quotations and when acknowledging purchase orders. 7. REJECTIONS Bearings not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection. 8. NOTES 8.1 A change bar (|) located in the left margin is for the convenience of the user in loc
29、ating 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 specification, including technical revision. Change bars and (R) are not used in original pub
30、lications, nor in specifications that contain editorial changes only. 8.2 Terms used in AMS are clarified in ARP1917. SAE AMS4800E Page 5 of 5 8.3 Dimensions and properties in inch/pound units and the Fahrenheit temperatures are primary; dimensions and properties in SI units and the Celsius temperat
31、ures 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: AMS 4800E Part number or size of bearings desired Quantity of bearings desired Procedures for determining bonding (3.3.2). PREPARED BY AMS COMMITTEE “D“
