1、AEROSPACE MATERIAL SPECIFICATION AMS4863 Issued 2015-02 Copper-Nickel-Tin Alloy Castings Cu 15Ni 8Sn Hot Isostatically Pressed, Solution Annealed and Spinodal Heat Treated (Composition similar to UNS C96900) RATIONALE AMS4863 is a new specification for copper-nickel-tin alloy castings. 1. SCOPE 1.1
2、Form This specification covers a copper-nickel-tin alloy in the form of castings, made using the investment process unless sand or centrifugal processes are agreed upon by the purchaser. 1.2 Application These copper alloy castings are for use as non-magnetic small parts of intricate design requiring
3、 good corrosion resistance and anti-friction and wear characteristics with high strength, 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 specification to the extent specified
4、 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. 2.1 SAE Publications Available f
5、rom SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. AMS2360 Room Temperature Tensile Properties of Castings AMS2750 Pyrometry AMS2804 Identification, Castings _ SAE Technical Standards Board R
6、ules 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 therefrom, is the sole responsibility
7、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 International All rights reserved. No part of this publication may be reproduced, sto
8、red 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 (outside USA) Fax: 724-776-0790
9、 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/AMS4863 SAE INTERNATIONAL AMS4863 Page 2 of 6 2.2 ASTM Publications Available from ASTM International, 100 Barr Ha
10、rbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM B660 Packaging/Packing of Aluminum and Magnesium Products ASTM E8/E8M Tension Testing of Metallic Materials ASTM E18 Rockwell Hardness of Metallic Materials ASTM E29 Using Significant Digits in Test Da
11、ta to Determine Conformance with Specifications ASTM E272 Reference Radiographs for High-Strength Copper-Base and Nickel-Copper Alloy Castings ASTM E478 Chemical Analysis of Copper Alloys ASTM E1417 Liquid Penetrant Testing ASTM E1742 Radiographic Examination 3. TECHNICAL REQUIREMENTS 3.1 Compositio
12、n Shall conform to the percentages by weight shown in Table 1, determined by wet chemical methods in accordance with ASTM E478, by spectro-chemical methods, or by other analytical methods acceptable to purchaser. Table 1 - Composition Element (3.1.1) min max Nickel (+ Cobalt) 14.5 15.5 Tin 7.5 8.5 I
13、ron - 0.50 Zinc - 0.50 Manganese - 0.30 Columbium - 0.10 Magnesium - 0.15 Lead - 0.02 Copper (3.1.2) remainder Copper + sum of Named Elements (3.1.3) 99.5 3.1.1 These composition limits do not preclude the presence of other elements. Limits may be established and analysis required for unnamed elemen
14、ts by agreement between the manufacturer or supplier and purchaser. 3.1.2 Copper may be reported as “remainder”, or as the difference between the sum of results for all elements and 100%, or as the result of direct analysis. 3.1.3 When all the elements in the table are analyzed, the sum shall be 99.
15、5% minimum, but such determination is not required for routine acceptance of each lot. 3.1.4 Test results may be rounded in accordance with the “rounding off” method of ASTM E29. SAE INTERNATIONAL AMS4863 Page 3 of 6 3.2 Condition Hot isostatically pressed, solution heat treated and spinodally harde
16、ned. 3.3 Casting Castings shall be made by the investment casting process unless another process is agreed to by purchaser. Castings shall be poured from a single furnace charge of not more than 2000 pounds (907 kg). The furnace charge may consist of virgin material, gates, sprues, risers, or other
17、recycled material. 3.4 Heat Qualification Each heat shall be qualified by chemical analysis and tensile specimens conforming to 3.4.1 and 3.4.2 respectively. Heat identity of all specimens and parts shall be maintained through all operations. 3.4.1 Chemical Analysis Specimens Shall be cast from each
18、 heat after the last melt addition, and shall be of any suitable size, shape, and form. 3.4.2 Tensile Specimens Unless otherwise specified by the purchaser, specimens shall be cast separately as net shape tensile specimens which are ready for testing after heat treatment (3.5). Specimens shall be of
19、 standard proportions in accordance with ASTM E8/E8M with 0.350 inch (8.89 mm) diameter at the reduced parallel gage section or shall be prepared as agreed upon with purchaser. 3.5 Heat Treatment All castings and representative tensile specimens shall be subjected to hot isostatic pressing (HIP) in
20、the as-cast condition, followed by solution annealing and spinodal heat treatment. Pyrometry shall be in accordance with AMS2750. Hot isostatic pressing, solution heat treatment and spinodal hardening heat treatment practices are proprietary. 3.6 Properties Separately-cast net shape tensile samples
21、shall conform to the following requirements: 3.6.1 Tensile Properties Shall be as shown in Table 2, determined in accordance with ASTM E8/E8M on specimens in accordance with 3.4.2. Table 2 - Minimum tensile properties Property Value Tensile Strength 113 ksi (779 MPa) Yield Strength at 0.2% Offset 96
22、 ksi (662 MPa) Elongation in 4D 2% 3.6.2 Hardness Shall be not lower than HBW277, or equivalent, determined in accordance with ASTM E18. 3.6.3 When properties other than those of 3.6.1 and 3.6.2 are required, the engineering drawing or purchase order shall specify tensile property and hardness limit
23、s. Property requirements may be designated in accordance with AMS2360. 3.6.4 Microstructure When specified, microstructure and grain size shall conform to standards acceptable to purchaser. SAE INTERNATIONAL AMS4863 Page 4 of 6 3.7 Quality 3.7.1 Castings, as received by purchaser, shall be uniform i
24、n quality and condition, sound, and free from foreign materials and from imperfections detrimental to usage of the castings. 3.7.2 Castings shall be produced under radiographic control. This control shall consist of radiographic examination of castings in accordance with ASTM E1742 until proper foun
25、dry technique is established for each part number, and of production castings as necessary to ensure satisfactory quality. ASTM E272 may be used to define radiographic acceptance standards acceptable to the purchaser. 3.7.3 When specified, castings shall be subjected to fluorescent penetrant inspect
26、ion in accordance with ASTM E1417. Standards for acceptance shall be as agreed upon between purchaser and vendor. 3.7.4 Castings shall not be reworked by plugging, peening, welding, or other methods without written permission from purchaser. 3.7.5 Methods of inspection and frequency of inspection sh
27、all be as agreed upon by purchaser and vendor. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The 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
28、 any confirmatory testing deemed necessary to ensure that the castings conform to specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Except as specified in 4.2.1.1, composition (3.1), tensile properties (3.6.1), hardness (3.6.2), and when specified, microstructure (3.6.4) and
29、 fluorescent penetrant inspection (3.7.3) are acceptance tests and shall be performed to represent each heat and lot of castings. 4.2.1.1 Tensile properties of specimens cut from castings shall be determined only when specified by purchaser or when separately-cast net shape tensile samples are not a
30、vailable. 4.2.2 Preproduction Tests All technical requirements are preproduction tests and shall be performed prior to or 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, and when purchaser deems confirmatory test
31、ing to be required. 4.3 Sampling and Testing A lot shall be all castings of the same form and size from the same heat processed at the same time. Sampling and testing shall include the following: 4.3.1 One chemical analysis specimen from each heat for conformance to 3.1. 4.3.2 A minimum of two casti
32、ngs from each lot for hardness testing in accordance with 3.6.2. 4.3.3 Sufficient castings of each part number shall be supplied in accordance with 4.4.1 to ensure that all requirements of the drawing and this specification can be tested. 4.3.4 Unless otherwise specified, one separately-cast net-sha
33、pe tensile sample, representing each lot for testing as in 3.6.1. SAE INTERNATIONAL AMS4863 Page 5 of 6 4.4 Approval 4.4.1 Sample castings from new or reworked master patterns and the casting procedure shall be approved by purchaser before castings for production use are supplied, unless such approv
34、al is 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 for producing production castings
35、. 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, test specimens, sample castings, or both. Production castings incorporating the revised procedures shall not be s
36、hipped prior to receipt of reapproval. 4.4.2.1 Control factors for producing castings include, but are not limited to, the following. Additional or other control factors may be listed depending on the method of casting. Type of furnace and its capacity The casting method used Type and size of furnac
37、e charge Time molten metal is in furnace Furnace atmosphere Fluxing or deoxidation procedure Number of ladles, if required, used in pour Mold refractory formulation Mold back-up material Gating practices Mold preheat and metal pouring temperatures; variations of 25 F (14 C) are permissible Solidific
38、ation and cooling procedures Solution heat treatment cycle Cleaning operations Methods 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 assigned a code designation. Each variation in such parameters shall be assigne
39、d a modified code designation. 4.5 Reports The vendor of castings shall furnish with each shipment a report showing the results of tests for composition of each heat and the results of tests on each lot to determine conformance to the other technical requirements. This report shall include the purch
40、ase order number, heat number, lot number, AMS4863, casting method, part number, and quantity. 4.6 Resampling and Retesting If any specimen used in the above tests fails to meet the specified requirements, disposition of the castings may be based on the results of testing two additional specimens fo
41、r each original nonconforming specimen. Failure of any retest specimen to meet the specified requirements shall be cause for rejection of the lot. Results of tests shall be reported. 5. PREPARATION FOR DELIVERY 5.1 Identification Shall be in accordance with AMS2804. 5.2 Packaging 5.2.1 Castings shal
42、l be prepared for shipment in accordance with ASTM B660 and in compliance with applicable rules and regulations pertaining to the handling, packaging, and transportation of the castings to ensure carrier acceptance and safe delivery. SAE INTERNATIONAL AMS4863 Page 6 of 6 6. ACKNOWLEDGMENT A vendor s
43、hall mention this specification number in all quotations and when acknowledging purchase orders. 7. REJECTIONS Castings not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection. 8. NOTES 8.1 A change bar (l) located in the left margin is for the
44、 convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous 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 no
45、t used in original publications, nor in documents that contain editorial changes only. 8.2 Terms used in AMS are clarified in ARP1917. 8.3 Dimensions and properties in inch/pound units and the Fahrenheit temperatures are primary; dimensions and properties in SI units and the Celsius temperatures are
46、 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: AMS4863 Part number or pattern number of castings desired Quantity of castings desired Type, location, and number of specimens for tensile testing when specimens cut from castings are required Microstructure and grain size acceptance standards, when specified (See 3.6.4) Radiographic acceptance standards (See 3.7.2) Fluorescent penetrant acceptance standards, when specified (See 3.7.3). PREPARED BY AMS COMMITTEE “D“
