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 2017 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:/standards.sae.org/AMS4893D AEROSPACE MATERIAL SPECIFICATION AMS4893 REV. D Issued 1959-01 Revised 2017-08 Superse
5、ding AMS4893C Alloy Castings, Corrosion and Heat-Resistant 66Ni - 29Cu - 4.0Si Solution Treated (Composition similar to UNS N04019) RATIONALE AMS4893D revises Composition (3.1) to replace a withdrawn chemical analysis standard, Radiographic acceptance (3.7.4.1), Quality (3.7.5.1), Reports (4.5), and
6、 Control Factors (4.4.2.1), and results from a Five-Year Review and update of this specification. 1. SCOPE 1.1 Form This specification covers a nickel-copper alloy in the form of castings. 1.2 Application These castings have been used typically for parts requiring resistance to wear and galling unde
7、r light-to-medium loads against dissimilar materials of higher hardness, and retention of hot hardness up to 1000 F (538 C), and where improved machinability or grinding over that of as-cast material is desired, but usage is not limited to such applications. 2. APPLICABLE DOCUMENTS The issue of the
8、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 specified. When the referenced document has been cancelled and no supers
9、eding 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: 877-606-7323 (inside USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org. AMS2175 Casting
10、s, Classification and Inspection of AMS2694 In-Process Welding of Aerospace Castings AMS2750 Pyrometry SAE INTERNATIONAL AMS4893D Page 2 of 6 AMS2804 Identification, Castings ARP1917 Clarification of Terms Used in Aerospace Metals Specifications 2.2 ASTM Publications Available from ASTM Internationa
11、l, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM E10 Brinell Hardness of Metallic Materials ASTM E76 Chemical Analysis of Nickel-Copper Alloys ASTM E140 Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers
12、Hardness, Rockwell Hardness, Superficial Hardness, Knoop Hardness, Scleroscope Hardness, and Leeb Hardness ASTM E272 Reference Radiographs for High-Strength Copper-Base and Nickel-Copper Alloy Castings ASTM E478 Chemical Analysis of Copper Alloys ASTM E1417/E1417M Liquid Penetrant Testing ASTM E1742
13、E1742M Radiographic Examination 3. TECHNICAL REQUIREMENTS 3.1 Composition Shall conform to the 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 purchaser. Table 1 - Composi
14、tion Element Min Max Nickel 60.0 - Copper 27.0 31.0 Silicon 3.5 4.5 Iron - 2.5 Manganese - 1.5 Cobalt - 1.0 Carbon - 0.25 Sulfur - 0.015 3.2 Condition Solution heat treated (see 3.5). 3.2.1 Centrifugal Castings Shall be rough turned and bored. 3.2.2 Sand Castings Solid round bars shall be rough turn
15、ed. SAE INTERNATIONAL AMS4893D Page 3 of 6 3.3 Casting Castings 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
16、pouring, the castings therefrom shall constitute a lot. A lot shall be not more than 2000 pounds (907 kg) of castings. 3.4 Chemical Analysis Specimens Shall be cast from each melt and shall be of any convenient size, shape, and form. When chemical analysis specimens are required by purchaser, specim
17、ens shall be cast to a size, shape, and form agreed upon by purchaser and producer. 3.5 Heat Treatment Castings shall be solution heat treated by heating from 1600 F to 1650 F (871 C to 899 C), holding at heat for 1 hour per inch (25 mm) of thickness for sections 1 inch (25 mm) and under plus an add
18、itional 1 hour per inch (25 mm) of cross section over 1 inch (25 mm), rapid furnace cooling to or transferring to another furnace held at 1200 F to 1300 F (649 C to 704 C), holding at heat for 30 minutes or until uniform temperature has been attained, and quenching in low-sulfur oil. For complicated
19、 sections, parts should be charged into a furnace which is at a temperature not higher than 600 F (316 C). Pyrometry shall be in accordance with AMS2750. 3.6 Response to Heat Treatment Castings shall conform to the following requirements: 3.6.1 Hardness as Solution Heat Treated Shall be not higher t
20、han 269 HB or equivalent (see 8.4) determined in accordance with ASTM E10. 3.6.2 Hardness after Precipitation Heat Treatment Shall be not lower than 302 HB, or equivalent, determined in accordance with ASTM E10, after being precipitation heat treated by heating to 1100 F 25 F (593 C 14 C), holding a
21、t heat for 4 to 6 hours, and air or furnace cooling. 3.7 Quality 3.7.1 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. 3.7.1.1 Castings shall have smooth surfaces and sh
22、all be sufficiently cleaned to permit fluorescent penetrant inspection. Metallic shot or grit shall not be used for final cleaning. 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 prop
23、er foundry technique, which will produce castings free from harmful internal imperfections, is established for each part number and of production castings as necessary to ensure maintenance of satisfactory quality. 3.7.3 Castings, when specified, shall be subjected to fluorescent penetrant inspectio
24、n in accordance with ASTM E1417 or other inspection procedure designated by purchaser. 3.7.4 Acceptance standards for radiographic, fluorescent penetrant, and other quality standards shall be as agreed upon by purchaser and producer. AMS2175 may be used to specify acceptance standards (casting grade
25、) and frequency of inspection (casting class). 3.7.4.1 When acceptance standards are not specified, castings shall meet Grade C of AMS2175 and radiographic indications of gas holes, sand spots, and inclusions shall be cause for rejection when closer to the edge than twice their maximum dimension. 3.
26、7.5 Castings shall not be repaired by peening, plugging, welding, or other methods without written permission from purchaser. SAE INTERNATIONAL AMS4893D Page 4 of 6 3.7.5.1 When permitted in writing by purchaser, castings may be welded in accordance with AMS2694. 4. QUALITY ASSURANCE PROVISIONS 4.1
27、Responsibility for Inspection The producer of castings shall supply all samples for producers 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
28、to specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Composition (3.1) and hardness of castings as solution treated (3.6.1) are acceptance tests and shall be performed on each heat or lot as applicable. 4.2.2 Periodic Tests Hardness of castings after precipitation heat treat
29、ment (3.6.2) and radiographic soundness 3.7.4 are periodic tests and shall be performed at a frequency selected by the producer unless frequency of testing is specified by purchaser. 4.2.3 Preproduction Tests All technical requirements are preproduction tests and shall be performed on sample casting
30、s (4.3.2), when a change in control factors occurs (4.4.2.1), and when purchaser deems confirmatory testing to be required. 4.3 Sampling and Testing The minimum testing performed by producer shall be in accordance with the following: 4.3.1 One chemical analysis specimen in accordance with 3.4 from e
31、ach melt or a casting from each lot. 4.3.2 One preproduction casting in accordance with 4.4 shall be tested to the requirements of the casting drawing and to all technical requirements. 4.4 Approval 4.4.1 Sample castings from new or reworked patterns or molds and the casting procedure shall be appro
32、ved by purchaser before castings for production use are supplied, unless such approval be waived by purchaser. 4.4.2 Producer shall establish for production of sample castings of each part number, parameters for the process control factors which will produce acceptable castings; these shall constitu
33、te the approved casting procedure and shall be used for producing production castings. If necessary to make any change in parameters for the process control factors, producer shall submit for reapproval a statement of the proposed changes in processing and, when requested, test specimens and/or samp
34、le castings. Production castings incorporating the 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 furnace Furnace atmosphere Fluxing or deoxidation procedure Gating and ris
35、ering practices Metal pouring temperature; variation of 50 F degrees (28 C degrees) from the established limit is permissible Mold setup, parting agent, and rotational speed for centrifugal castings Solidification and cooling procedures Cleaning operations Methods of inspection SAE INTERNATIONAL AMS
36、4893D Page 5 of 6 4.4.2.1.1 Any of the above process control factors for which parameters are considered proprietary by the producer may be assigned a code designation. Each variation in such parameters shall be assigned a modified code designation. 4.5 Reports The producer of the product shall furn
37、ish with each shipment a report showing the results of tests to determine conformance to the acceptance test requirements. This report shall include the purchase order number, master heat identification, heat treat/lot identification, AMS4893D, part number, and quantity. 4.5.1 When castings produced
38、 to this specification, have exceptions taken to the technical requirements listed in Section 3, the report shall contain a statement “This material is certified as AMS4893D(EXC) because of the following exceptions.” and the specific exceptions shall be listed. 4.6 Resampling and Retesting If any sp
39、ecimen used in the above tests fails to meet the specified requirements, disposition of the castings may be based on the results of testing three additional specimens for each original nonconforming specimen. Failure of any retest specimen to meet the specified requirements shall be cause for reject
40、ion of the castings represented. Results of all tests shall be reported. 5. PREPARATION FOR DELIVERY 5.1 Identification Shall be in accordance with AMS2804. 5.2 Packaging Castings shall be prepared for shipment in accordance with commercial practice and in compliance with applicable rules and regula
41、tions pertaining to the handling, packaging, and transportation of the castings to ensure carrier acceptance and safe delivery. 6. ACKNOWLEDGMENT A producer shall mention this specification number and its revision letter in all quotations and when acknowledging purchase orders. 7. REJECTIONS Casting
42、s not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection. 8. NOTES 8.1 Revision Indicator A 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 b
43、een 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 not used in original publications, nor in documents that contain editorial changes only. 8.2 Terms us
44、ed 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 shown as the approximate equivalents of the primary units and are presented only for information.
45、SAE INTERNATIONAL AMS4893D Page 6 of 6 8.4 Hardness conversion tables for metals are presented in ASTM E140. 8.5 Purchase documents should specify not less than the following: AMS4893D Type and part number or pattern or mold number of castings desired Quantity of castings desired Type of nondestructive testing required and standards for acceptance (see 3.7) 8.6 Similar Specifications Federal QQ-N-288, Composition D, is 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 “F“
