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 2014 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/AMS5346C AEROSPACE MATERIAL SPECIFICATION AMS5346 REV. C Issued 1978-10 Revised 2
5、006-06 Reaffirmed 2014-04 Superseding AMS5346B Steel, Corrosion-Resistant, Investment Castings 15Cr - 4.6Ni - 0.22Cb (Nb) - 2.8Cu Solution and Precipitation Heat Treated (H925) 180 ksi (1241 MPa) Tensile Strength (15-5) (Composition similar to UNS J92110) RATIONALE AMS5346C has been reaffirmed to co
6、mply with the SAE five-year review policy. 1. SCOPE 1.1 Form This specification covers a corrosion-resistant steel in the form of investment castings. 1.2 Application These castings have been used typically for parts requiring good corrosion resistance and strength up to 600 F (316 C), but usage is
7、not limited such applications (See 8.4). 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 subsequent revision of this document unless a specific docum
8、ent 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 Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (
9、inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. AMS 2175 Castings, Classification and Inspection of AMS 2248 Chemical Check Analysis Limits, Corrosion and Heat-Resistant Steels and Alloys, Maraging and Other Highly-Alloyed Steels, and Iron Alloys AMS 2360 Room Temperature Tensile
10、Properties of Castings AMS 2694 Repair Welding of Aerospace Castings AMS 2804 Identification, Castings AMS 2700 Passivation of Corrosion-Resistant Steels AMS-H-6875 Heat Treatment of Steel, Raw Materials SAE INTERNATIONAL AMS5346C Page 2 of 11 2.2 ASTM Publications Available from ASTM International,
11、 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM E 8 Tension Testing of Metallic Materials ASTM E 8M Tension Testing of Metallic Materials (Metric) ASTM E 18 Rockwell Hardness and Rockwell Superficial Hardness of Metallic Materials ASTM E
12、 353 Chemical Analysis of Stainless, Heat-Resisting, Maraging, and Other Similar Chromium-Nickel-Iron Alloys ASTM E 1417 Liquid Penetrant Examination ASTM E 1444 Magnetic Particle Examination ASTM E 1742 Radiographic Examination 3. TECHNICAL REQUIREMENTS 3.1 Composition Shall conform to the percenta
13、ges by weight shown in Table 1, determined by wet chemical methods in accordance with ASTM E 353, by spectrochemical methods, or by other analytical methods acceptable to purchaser (See 8.2.1 and 8.2.2). TABLE 1 - COMPOSITION Element min max Carbon Manganese Silicon Phosphorus Sulfur Chromium Nickel
14、 Columbium (Niobium) Copper Nitrogen - - 0.50 - - 14.00 4.20 0.15 2.50 - 0.05 0.60 1.00 0.0250.02515.50 5.00 0.30 3.20 0.05 3.1.1 Vendor may test for any element not otherwise listed in Table 1 and include this analysis in the report of 4.5. Limits of acceptability may be specified by purchaser (See
15、 8.2.3). 3.1.2 Check Analysis Composition variations shall meet the applicable requirements of AMS 2248. 3.2 Melting Practice Castings and specimens shall be poured, at casting vendors facility, either from a melt (See 8.2.4) of a master heat or directly from a master heat (See 3.4.2 and 8.2.5). 3.2
16、.1 Revert (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. Melting of revert creates a new master heat. 3.2.2 Portions of two or more qualified master heats (See 3.4.2
17、) may be melted together and poured into castings using a procedure authorized by purchaser (See 8.2.6). 3.2.3 If melts are modified by replenishment (See 8.2.7), vendor shall have a written procedure acceptable to purchaser which defines the controls, test, and traceability criteria for both castin
18、gs and separately-cast specimens. Control factors of 4.4.2.2 shall apply. SAE INTERNATIONAL AMS5346C Page 3 of 11 3.3 Condition Castings shall be delivered in the solution treated and precipitation heat treated condition, except as specified in 3.3.1 or 3.3.2. 3.3.1 When specified by or when accepta
19、ble to purchaser, castings shall be solution heat treated twice and precipitation heat treated. 3.3.2 When specified by purchaser, castings shall be homogenization, solution, and precipitation heat treated. 3.4 Specimens Specimens shall be either separately-cast, integrally-cast (See 8.2.8), or mach
20、ined from a casting, and shall conform to 3.2. 3.4.1 If specimens are separately-cast, vendor shall have a written procedure acceptable to purchaser. Control factors of 4.4.2.2 shall apply. 3.4.2 Each master heat shall be qualified by evaluation of chemical and tensile specimens. 3.4.2.1 If replenis
21、hments 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. 3.4.2.2 Tensile tests of 3.4.2 are not required if these tests are conducted using integrally-cast specimens (4.3.3.2) or specimens machined-fr
22、om- casting (4.3.3.3). 3.4.3 Chemical Analysis Specimens Shall be of any convenient size and shape. 3.4.4 Tensile 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 reduced parallel gage section. 3.4.4.1 Separately-
23、cast and integrally-cast specimens may be either cast to size or cast oversize and subsequently machined to 0.250-inch (6.35-mm) diameter. 3.4.4.2 When integrally-cast specimens or specimens machined-from-casting are specified, specimen size and/or location shall be as agreed upon by purchaser and v
24、endor (See 8.2.9 and 8.6). 3.5 Heat Treatment Castings and representative tensile specimens shall be heat treated in accordance with AMS-H-6875 except as specified in 3.5.1. 3.5.1 Castings and Tensile Specimens 3.5.1.1 Homogenization Heat Treatment (When Specified) Heat to 2100 F 25 (1149 C 14), hol
25、d at heat for not less than 90 minutes, and cool as required. 3.5.1.2 Solution Heat Treatment Heat to 1900 F 25 (1038 C 14), hold at heat for 1 hour per inch (25-mm) of section thickness but not less than 30 minutes, and cool to below 90 F (32 C) at a rate equivalent to an air cool or faster. SAE IN
26、TERNATIONAL AMS5346C Page 4 of 11 3.5.1.3 Precipitation Heat Treatment Heat to 925 F 15 (496 C 8), hold at heat for not less than 90 minutes, and cool in air or inert gas. 3.5.2 Tensile specimens used for master heat qualification may be heat treated separately from castings. 3.6 Properties Conforma
27、nce shall be based upon testing of separately-cast specimens unless purchaser specifies integrally-cast specimens or specimens machined-from-casting. 3.6.1 Room Temperature Tensile Properties Shall be as specified in 3.6.1.1 or 3.6.1.2, determined in accordance with ASTM E 8 or ASTM E 8M (See 8.3).
28、Properties other than those listed may be defined as specified in AMS 2360. 3.6.1.1 Separately-Cast Specimens Shall be as shown in Table 2. TABLE 2 - MINIMUM ROOM TEMPERATURE TENSILE PROPERTIES OF SEPARATELY-CAST SPECIMENS Property Value Tensile Strength Yield Strength at 0.2% Offset Elongation in 4
29、D Reduction of Area 180 ksi (1241 MPa) 160 ksi (1103 MPa) 6% 15% 3.6.1.2 Integrally-Cast Specimens or Specimens Machined-from-Casting Shall be as shown in Table 3. TABLE 3 - MINIMUM ROOM TEMPERATURE TENSILE PROPERTIES OF INTEGRALLY-CAST AND SPECIMENS MACHINED-FROM-CASTING Property Value Tensile Stre
30、ngth Yield Strength at 0.2% Offset Elongation in 4D Reduction of Area 180 ksi (1241 MPa)160 ksi (1103 MPa)5% 12% 3.6.2 Hardness Shall be as follows, determined in accordance with ASTM E 18. 3.6.2.1 Castings Except as specified in 4.3.5.2, castings heat treated to the condition of 3.3 shall have hard
31、ness of 40 to 47 HRC. 3.6.2.2 Representative Specimens Hardness not applicable. SAE INTERNATIONAL AMS5346C Page 5 of 11 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
32、of the castings. Castings shall be free of cracks, laps, hot tears, and cold shuts, and free of scale and other process-induced surface contamination which would obscure defects. 3.7.1.1 Unless otherwise specified, cast surfaces shall be sufficiently cleaned such that, after passivation by purchaser
33、, the castings shall meet the corrosion test requirement of AMS 2700. 3.7.2 Castings shall be produced 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.
34、 Additional radiography shall be conducted in accordance with the frequency of inspection specified by purchaser, or as necessary to ensure continued maintenance of internal quality. 3.7.2.1 Radiographic inspection shall be conducted in accordance with ASTM E 1742 or other method specified by purcha
35、ser. 3.7.3 When specified, additional nondestructive testing shall be performed as follows: 3.7.3.1 Fluorescent penetrant inspection in accordance with ASTM E 1417 or other method specified by purchaser. 3.7.3.2 Magnetic particle inspection in accordance with ASTM E 1444 or other method specified by
36、 purchaser. 3.7.4 Acceptance standards for radiographic, fluorescent penetrant, magnetic particle, visual, and other inspection methods shall be as agreed upon by purchaser and vendor (See 8.2.8). AMS 2175 may be used to specify acceptance standards (casting grade) and frequency of inspection (casti
37、ng class). 3.7.4.1 When acceptance standards are not specified, Grade C of AMS 2175 shall apply for each applicable method of inspection. 3.7.5 Castings shall not be peened, plugged, impregnated, or welded unless authorized by purchaser. 3.7.5.1 When authorized by purchaser, welding in accordance wi
38、th AMS 2694 or other welding program acceptable to purchaser may be used. 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 rig
39、ht to sample and to perform any confirmatory testing deemed necessary to ensure that the castings conform to specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Composition (3.1), tensile properties (3.6.1), hardness of castings (3.6.2), and the applicable requirements of qual
40、ity (3.7) are acceptance tests and shall be performed as specified in 4.3. 4.2.2 Periodic Tests Corrosion resistance (3.7.1.1) and radiographic soundness (3.7.2) are periodic tests and shall be performed at a frequency selected by vendor unless a frequency of testing is specified by purchaser. SAE I
41、NTERNATIONAL AMS5346C Page 6 of 11 4.2.3 Preproduction 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), and when purchaser deems confirmatory testing to be required. 4.3 Sampling and Testing
42、 The minimum testing performed by vendor shall be in accordance with the following: 4.3.1 One 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. 4.3.2 One preproduction casti
43、ng in accordance with 4.4 shall be tested to the requirements of the casting drawing and to all technical requirements. 4.3.2.1 Dimensional inspection sample quantity shall be as specified by purchaser. 4.3.3 Tensile property tests shall be conducted to determine conformance with Table 2 or Table 3.
44、 Sampling and test frequency are dependent upon the type and origin of specimen specified by purchaser (See 3.4.4 and 3.6) or selected by vendor (See 4.3.3.4). When 3.4.2.1 applies, specimen source and test frequency shall be acceptable to purchaser. 4.3.3.1 For separately-cast specimens in the full
45、y heat treated condition (See 3.3 and 3.5.1), one specimen from each master heat shall be tested to 3.6.1. 4.3.3.2 For integrally-cast specimens in the fully heat treated condition (See 3.3 and 3.5.1), two specimens from each lot (See 8.2.10) shall be randomly selected and tested to 3.6.1. 4.3.3.3 F
46、or specimens machined-from-casting, one casting shall be randomly selected from each lot and tested after full heat treatment (See 3.3 and 3.5.1) at each location shown on the engineering drawing for conformance with 3.6.1.2. 4.3.3.3.1 When size and location of specimens are not shown, two test spec
47、imens 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 purchaser and vendor. 4.3.3.4 When acceptable to purchaser, specimens machined-from-casting may be used in lieu of both separat
48、ely-cast and integrally-cast specimens, and integrally-cast specimens may be used in lieu of separately-cast specimens. In each case, the resultant properties shall conform to requirements of 3.6 for that type of specimen. 4.3.3.4.1 When specimens are selected for test as in 4.3.3.4 from an origin o
49、ther than that specified by purchaser, vendor shall include in the report of 4.5 a description of the source of the specimen that was tested. 4.3.3.5 When casting size, section thickness, gating method, or other factors do not permit conformance to 4.3.3.2 or 4.3.3.3, sampling and testing shall be agreed upon by purchaser and vendor. 4.3.4 Castings shall be inspected in accordance with 3.7 to the methods, frequen
