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1、AEROSPACE MATERIAL SPECIFICATION AMS 5385G IssuedSEP 1947 RevisedJAN 1999 Superseding AMS 5385F (R) Cobalt Alloy, Corrosion and Heat Resistant, Investment Castings 62Co - 27Cr - 2.8Ni - 5.5Mo As Cast UNS R30021 1.SCOPE: 1.1Form: This specification covers a corrosion and heat resistant cobalt alloy i
2、n the form of investment castings. 1.2Application: These castings have been used typically for parts such as turbine vanes requiring high strength up to 1500 F (816 C), and oxidation resistance up to 2000 F (1095 C), but usage is not limited to such applications. 1.2.1Exposure to elevated temperatur
3、es may cause hardening of these castings; e.g., exposure at approximately 1475 F (800 C) for 50 hours may result in hardness as high as 45 HRC. 2.APPLICABLE DOCUMENTS: The following publications form a part of this specification to the extent specified herein. The latest issue of SAE publications sh
4、all apply. The applicable issue of other publications shall be the issue in effect on the date of the purchase order. 2.1SAE Publications: Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001. AMS 2269Chemical Check Analysis Limits, Nickel, Nickel Alloys, and Cobalt Alloys AMS 2360R
5、oom Temperature Tensile Properties of Castings AMS 2361Elevated Temperature Tensile Testing of Castings AMS 2694Repair Welding of Aerospace Castings AMS 2804Identification, Castings SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical a
6、nd 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 of the user.” SAE reviews each technical report at least every five years at which time
7、 it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2007 SAE International All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, phot
8、ocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: 724-776-4970 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org Reaffirmed SEP 2007 RATIONALE This d
9、ocument has been reaffirmed to comply with the SAE 5-year Review policy. Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 19:45:46 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 5385GSAE
10、AMS 5385G - 2 - 2.2ASTM Publications: Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. ASTM E 8Tension Testing of Metallic Materials ASTM E 8MTension Testing of Metallic Materials (Metric) ASTM E 21Elevated Temperature Tension Tests of Metallic Materials ASTM E 354Chemic
11、al Analysis of High-Temperature, Electrical, Magnetic, and Other Similar Iron, Nickel, and Cobalt Alloys ASTM E 1417 Liquid Penetrant Examination 2.3U.S. Government Publications: Available from DODSSP, Subscription Services Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094. MIL-STD-
12、453Inspection, Radiographic MIL-STD-2175Castings, Classification and Inspection of 3.TECHNICAL REQUIREMENTS: 3.1Composition: Castings shall conform to the percentages by weight shown in Table 1, determined by wet chemical methods in accordance with ASTM E 354, by spectrochemical methods, or by other
13、 analytical methods acceptable to purchase (See 8.2.1 and 8.2.2). TABLE 1 - Composition Elementminmax Carbon 0.20 0.30 Manganese- 1.00 Silicon- 1.00 Phosphorus- 0.04 Sulfur- 0.04 Chromium25.00 29.00 Nickel 1.75 3.75 Molybdenum 5.00 6.00 Boron- 0.007 Iron- 3.00 Other elements (3.1.1)- - Cobaltremaind
14、er Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 19:45:46 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 5385GSAEAMS 5385G - 3 - 3.1.1Vendor may test for any element not otherwise lis
15、ted in Table 1 and include this analysis in the report of 4.5. Limits of acceptability may be specified by purchaser (See 8.2.3). 3.1.2Check Analysis: Composition variations shall meet the requirements of AMS 2269. 3.2Melt Practice: Castings and specimens shall be poured at casting vendors facility
16、either from a melt (See 8.2.4) of a master heat, or directly from a master heat (See 8.2.5). 3.2.1Revert (gates, sprues, risers, and rejected castings) may be used only in the preparation of master heats; revert shall not be remelted directly without refining for pouring of castings. 3.2.2Portions o
17、f two or more qualified master heats (See 3.4.2) may be melted together and poured into castings using a procedure authorized by purchaser (See 8.2.6). 3.2.3If modifications, such as alloy additions or replenishments, are made by the vendor at remelt, vendor shall have a written procedure acceptable
18、 to purchaser which defines the controls, test, and traceability criteria for both castings and separately-cast specimens. Control factors of 4.4.2.2 shall apply. 3.3Condition: Castings shall be delivered in the as-cast condition. 3.4Test Specimens: Specimens shall be either separately-cast, integra
19、lly-cast (See 8.2.7), or machined from a casting, and shall conform to 3.2. 3.4.1If specimens are separately-cast, vendor shall have a written procedure acceptable to purchaser. Control factors of 4.4.2.2 shall apply. 3.4.2Each master heat shall be qualified by evaluation of chemical and tensile spe
20、cimens. 3.4.2.1If alloy additions or replenishments are made at remelt as in 3.2.3, the frequency of sampling and testing used by the vendor for qualification to 3.4.2 shall be acceptable to purchaser. 3.4.2.2Tensile tests of 3.4.2 are not required if these tests are conducted using integrally-cast
21、specimens (4.3.3.2) or specimens machined from a casting (4.3.3.3). 3.4.3Chemical Analysis Specimens: Shall be of any convenient size and shape. 3.4.4Tensile Specimens: Shall be of standard proportions in accordance with ASTM E 8 or ASTM E 8M (See 8.3) with 0.250 inch (6.35 mm) diameter at the reduc
22、ed parallel gage section. Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 19:45:46 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 5385GSAEAMS 5385G - 4 - 3.4.4.1Separately-cast and inte
23、grally-cast specimens may be either cast to size, or cast oversize and subsequently machined to 0.250 inch (6.35 mm) diameter. 3.4.4.2When integrally-cast specimens and specimens machined from a casting are specified, specimen size and location shall be agreed upon by purchaser and vendor (See 8.2.8
24、 and 8.5). 3.5Heat Treatment: Not applicable 3.6Properties: Conformance shall be based upon testing of separately-cast specimens unless purchaser specifies integrally-cast specimens or specimens machined from a casting. Properties for integrally-cast specimens machined from a casting shall be as spe
25、cified by purchaser. 3.6.1Room Temperature Tensile Properties: Tensile properties may be specified by purchaser, in accordance with AMS 2360. 3.6.2Elevated Temperature Tensile Properties at 1500 F (816 C): Shall be as follows, determined in accordance with ASTM E 21 on specimens heated to 1500 F 10
26、(816 C 6), held at heat for not less than 10 minutes before testing, and tested at 1500 F 10 (816 C 6). Properties other than those listed may be defined as in AMS 2361. 3.6.2.1Separately-Cast Specimens: Shall be as shown in Table 2. 3.6.3Hardness: As Cast; Not higher than 34 HRC, or equivalent, det
27、ermined in accordance with ASTM E 18. 3.7Quality: 3.7.1Castings, as received by purchaser, shall be uniform in quality and condition. Castings shall, to the extent defined in 3.7.2., 3.7.3, and 3.7.4, or in supplemental standards specified by the purchaser, be free from porosity, foreign materials,
28、and imperfections detrimental to their performance. Castings shall be free of cracks, laps, hot tears, and cold shuts, and free of scale and other surface contamination which would obscure defects. TABLE 2 - Minimum Elevated Temperature Tensile Properties PropertyValue Tensile strength52.0 ksi (360
29、MPa) Elongation in 4D10% Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 19:45:46 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 5385GSAEAMS 5385G - 5 - 3.7.2Castings shall be produced
30、under radiographic control. This control shall consist of radiographic examination of each casting part number until foundry manufacturing controls in accordance with 4.4.2 have been established. Additional radiography shall be conducted in accordance with the frequency of inspection specified by pu
31、rchaser, or as necessary to ensure continued maintenance of internal quality. 3.7.2.1Radiographic inspection shall be conducted in accordance with MIL-STD-453 or other method specified by purchaser. 3.7.3When specified, castings shall be subjected to fluorescent penetrant inspection in accordance wi
32、th ASTM E 1417 or other method specified by purchaser. 3.7.4Acceptance standards for radiographic, fluorescent penetrant, visual, and other inspection methods shall be agreed upon by purchaser and vendor (See 8.2.8). MIL-STD-2175 may be used to specify acceptance standards (casting grade) and freque
33、ncy of inspection (casting class). 3.7.4.1When acceptance standards are not specified, Grade C of MIL-STD-2175 as applicable to steel castings shall apply for each applicable method of inspection. 3.7.5Castings shall not be peened, plugged, impregnated, or welded unless authorized by purchaser. 3.7.
34、5.1When authorized by purchaser, welding in accordance with AMS 2694 or other welding program acceptable to purchaser may be used. 4.QUALITY ASSURANCE PROVISIONS: 4.1Responsibility for Inspection: The vendor of castings shall supply all samples for vendors tests and shall be responsible for the perf
35、ormance 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 requirements. 4.2Classification of Tests: 4.2.1Acceptance Tests: Composition (3.1), room temperature tensile properties if s
36、pecified (3.6.1), elevated temperature tensile properties (3.6.2), as-cast hardness (3.6.3), and quality (3.7) are acceptance tests and shall be performed as specified in 4.3. 4.2.2Periodic Tests: Radiographic soundness (3.7.2) is a periodic test and shall be performed at a frequency selected by ven
37、dor, unless frequency of testing is specified by purchaser. 4.2.3Preproduction Tests: All technical requirements are preproduction tests and shall be performed on sample castings (4.3.2), when a change in control factors occurs (4.4.2.2), or when purchaser deems confirmatory testing to be required.
38、Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 19:45:46 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 5385GSAEAMS 5385G - 6 - 4.3Sampling and Testing: The minimum testing performed by
39、 vendor shall be in accordance with the following: 4.3.1One chemical analysis specimen or a casting from each master heat shall be tested for conformance with Table 1; if 3.4.2.1 applies, test frequency shall be acceptable to purchaser. 4.3.2One preproduction casting in accordance with 4.4 shall be
40、tested to the requirements of the casting drawing and to all technical requirements. 4.3.2.1Dimensional inspection sample quantity shall be as specified by purchaser. 4.3.3Tensile tests shall be conducted to determine conformance with Table 2. Sampling and test frequency is dependent upon the type a
41、nd origin of specimen specified by purchaser (See 3.4.4) or selected by vendor (See 4.3.3.4). When 3.4.2.1 applies, test frequency shall be acceptable to purchaser. 4.3.3.1For separately-cast specimens in the as cast condition, one specimen from each master heat shall be tested to Table 2. 4.3.3.2Fo
42、r integrally-cast specimens in the as-cast condition, two specimens from each lot (See 8.2.9) shall be randomly selected and tested to Table 2. 4.3.3.3For specimens machined from casting, one casting shall be randomly selected from each lot and tested in the as-cast condition, at locations shown on
43、the engineering drawing for conformance with Table 2. 4.3.3.3.1When size and location of specimens are not shown, two test specimens shall be tested, one from the thickest section and one from the thinnest section. Once established under 4.4.2.2, test locations may be changed only as agreed upon by
44、purchaser and vendor. 4.3.3.4When acceptable to purchaser, specimens machined from a casting may be used in lieu of both separately-cast and integrally-cast specimens, and integrally-cast specimens may be used in lieu of separately-cast specimens. In each case, the resultant properties must conform
45、to the requirements of 3.6 or to alternative requirements specified by purchaser (See 8.5). 4.3.3.4.1When specimens are selected for test as in 4.3.3.4 from an origin other than that specified by purchaser, vendor shall include in the report of 4.5 a description of the origin of the specimen that wa
46、s tested. 4.3.3.5When casting size, section thickness, gating method, or other factors do not permit conformance with 4.3.3.2 or 4.3.3.3, sampling and testing shall be agreed upon by purchaser and vendor. 4.3.4Castings shall be inspected in accordance with 3.7 to the methods, frequency, and acceptan
47、ce standards specified by purchaser. Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 19:45:46 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 5385GSAEAMS 5385G - 7 - 4.3.5One casting or
48、representative specimen from each master heat shall be tested for hardness to determine conformance with 3.6.3. 4.4Approval: 4.4.1Sample casting(s) from new or reworked master patterns produced under the casting procedure of 4.4.2 shall be approved by purchaser before castings for production use are supplied, unless such approval be waived by purchaser. 4.4.2For each casting part number, vendor shall establish parameters for process control factors that will consistently produce castings and test specimens meeting the requirements of the casting drawing and this specificati