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 2016 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/AMS5843G AEROSPACE MATERIAL SPECIFICATION AMS5843 REV. G Issued 1977-03 Revised 2
5、016-06Superseding AMS5843F Cobalt-Nickel Alloy, Corrosion and Heat-Resistant, Bars 19Cr - 36Co - 25Ni - 7.0Mo - 0.50Cb (Nb) - 2.9Ti - 0.20Al - 9.0Fe Vacuum Induction Plus Vacuum Consumable Electrode Melted Solution Heat Treated, Work Strengthened, and Aged (Composition similar to UNS R30159)RATIONAL
6、E AMS5843G revises Reports (4.4), and is a Five Year Review and update of this this specification. 1. SCOPE 1.1 Form This specification covers a high strength, corrosion and heat-resistant cobalt-nickel-chromium alloy in the form of bars (see 8.2). 1.2 Application These bars have been used typically
7、 for applications requiring a combination of high strength up to 1100 F (593 C), good tension-tension fatigue strength, toughness, and ductility (see 8.2), but usage is not limited to such applications. This alloy exhibits exceptionally good resistance to corrosion, crevice-corrosion, stress-corrosi
8、on cracking, and elevated temperature relaxation. 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 a document unless a specific
9、 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 Drive, Warrendale, PA 15096-0001, Tel: 877-606-
10、7323 (inside USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org. AMS2261 Tolerances, Nickel, Nickel Alloy, and Cobalt Alloy Bars, Rods, and Wire AMS2269 Chemical Check Analysis Limits, Nickel, Nickel Alloys, and Cobalt Alloys AMS2371 Quality Assurance Sampling and Testing, Corrosion and H
11、eat-Resistant Steels and Alloys, Wrought Products and Forging Stock SAE INTERNATIONAL AMS5843G Page 2 of 6 AMS2750 Pyrometry AMS2806 Identification Bars, Wire, Mechanical Tubing, and Extrusions, Carbon and Alloy Steels and Corrosion and Heat-Resistant Steels and Alloys ARP1917 Clarification of Terms
12、 Used in Aerospace Metals Specifications 2.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM E8/E8M Tension Testing of Metallic Materials ASTM E18 Rockwell Hardness of Metallic Material
13、s ASTM E21 Elevated Temperature Tension Tests of Metallic Materials ASTM E112 Determining Average Grain Size ASTM E139 Conducting Creep, Creep-Rupture, and Stress-Rupture Tests of Metallic Materials ASTM E140 Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness
14、, Rockwell Hardness, Superficial Hardness, Knoop Hardness, Scleroscope Hardness, and Leeb Hardness ASTM E292 Conducting Time-for-Rupture Notch Tension Tests of Materials ASTM E354 Chemical Analysis of High-Temperature, Electrical, Magnetic, and Other Similar Iron, Nickel, and Cobalt Alloys 3. TECHNI
15、CAL REQUIREMENTS 3.1 Composition Shall conform to the percentages by weight shown in Table 1, determined by wet chemical methods in accordance with ASTM E354, by spectrochemical methods, or by other analytical methods acceptable to purchaser. Table 1 - Composition Element min max Carbon Manganese Si
16、licon Phosphorus Sulfur Chromium Cobalt Molybdenum Columbium (Niobium) Titanium Aluminum Iron Boron Nickel - - - - - 18.00 34.00 6.00 0.25 2.50 0.10 8.00 - remainder 0.04 0.20 0.20 0.020 0.010 20.00 38.0 8.00 0.75 3.25 0.30 10.00 0.03 SAE INTERNATIONAL AMS5843G Page 3 of 6 3.1.1 Check Analysis Compo
17、sition variations shall meet the applicable requirements of AMS2269. 3.2 Melting Practice Alloy shall be produced by multiple melting using vacuum induction followed by vacuum consumable electrode melting practice. 3.3 Condition Solution heat treated, cold drawn, aged, and centerless ground. 3.4 Hea
18、t Treatment Bars shall be solution heat treated by heating to a temperature within the range 1900 to 1925 F (1038 to 1052 C), holding at the selected temperature within 25 F (14 C) for 4 to 8 hours, and quenching in water. After cold drawing, bars shall be aged by heating to a temperature within the
19、 range 1200 to 1250 F (649 to 677 C), holding at the selected temperature within 25 F (14 C) for not less than 4 hours, and cooling at a rate equivalent to an air cool or faster (see 8.2). Pyrometry shall be in accordance with AMS2750. 3.5 Properties Bars 1-3/4 inches (44.4 mm) and under in nominal
20、diameter shall conform to the following requirements (see 8.2): 3.5.1 Tensile Properties 3.5.1.1 At Room Temperature Shall be as shown in Table 2, determined in accordance with ASTM E8/E8M. Table 2 - Minimum room temperature tensile properties Property Value Tensile Strength Yield Strength at 0.2% O
21、ffset Elongation in 4D Reduction of Area 260 ksi (1793 MPa) 250 ksi (1724 MPa) 6% 22% 3.5.1.2 At 1100 F (593 C) Shall be as shown in Table 3, determined in accordance with ASTM E21 on specimens heated to 1100 F 10 F (593 C 6 C), held at heat for 20 to 30 minutes before testing, and tested at 1100 F
22、10 F (593 C 6 C). Table 3 - Minimum elevated temperature tensile properties Property Value Tensile Strength Yield Strength at 0.2% Offset Elongation in 4D Reduction of Area 205 ksi (1413 MPa) 190 ksi (1310 MPa) 5% 15% SAE INTERNATIONAL AMS5843G Page 4 of 6 3.5.2 Hardness Shall be not lower than 44 H
23、RC, or equivalent (see 8.3), determined in accordance with ASTM E18. 3.5.3 Average Grain Size Shall be ASTM No. 4 or finer, determined in accordance with ASTM E112. 3.5.4 Stress-Rupture Properties at 1200 F (649 C) Shall be as follows; testing of notched specimens and of combination smooth-and-notch
24、ed specimens shall be in accordance with ASTM E292 and of smooth specimens in accordance with ASTM E139: 3.5.4.1 A standard cylindrical combination smooth-and-notched specimen conforming to ASTM E292, maintained at 1200 F 3 F (649 C 2 C) while a load sufficient to produce an initial axial stress of
25、140 ksi (965 MPa) or higher is applied continuously, shall not rupture in less than 23 hours. The test shall be continued to rupture without change of load. After 23 hours, if rupture occurs in the notch, the smooth section shall, by suitable means, be continued to rupture or a separate smooth speci
26、men shall be tested to rupture under the above conditions. Elongation of the smooth section after rupture, measured at room temperature, shall be not less than 5% in 4D. 3.5.4.2 As an alternate procedure, separate smooth and notched specimens, machined from adjacent sections of the same piece with g
27、age sections conforming to the respective dimensions shown in ASTM E292, may be tested individually under the conditions of 3.5.4.1. The smooth specimen shall not rupture in less than 23 hours and elongation after rupture, measured at room temperature, shall be not less than 5% in 4D. The notched sp
28、ecimen shall not rupture in less than 23 hours and need not be tested to rupture. 3.5.4.3 The tests of 3.5.4.1 and 3.5.4.2 may be conducted using incremental loading. In such case, the load required to produce an initial axial stress of 140 ksi (965 MPa) or higher shall be used to rupture or for 23
29、hours, whichever occurs first. After the 23 hours and at intervals of 8 hours minimum, thereafter, the stress shall be increased in increments of 5.0 ksi (34.5 MPa). Time to rupture and elongation requirements shall be as specified in 3.5.4.1. 3.6 Quality Bars, as received by purchaser, shall be uni
30、form in quality and condition, sound, and free from foreign materials and from imperfections detrimental to usage of the bars. 3.7 Tolerances Shall conform to all applicable requirements of AMS2261. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The producer of the product shall s
31、upply 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 bars conform to specified requirements. 4.2 Classification of Tests All technic
32、al requirements are acceptance tests and shall be performed on each heat or lot as applicable: SAE INTERNATIONAL AMS5843G Page 5 of 6 4.3 Sampling and Testing Shall be in accordance with AMS2371, and the following: 4.3.1 Specimens for tensile and smooth-bar stress-rupture testing shall be of standar
33、d proportions in accordance with ASTM E8/E8M with either 0.250 inch (6.35 mm) diameter at the reduced parallel gage section or smaller specimens proportional to the standard when required. Other stress-rupture specimens shall be as specified in 3.5.4. All specimens shall be machined from the center
34、of bars 0.800 inch (20.32 mm) and under in nominal diameter or distance between parallel sides, and from mid-radius of larger size bars. 4.4 Reports The producer of the product shall furnish with each shipment a report showing the producers name and country where the metal was melted (e.g., final me
35、lt in the case of metal processed by multiple melting operations), and the results of tests for composition of each heat and for tensile properties, hardness, average grain size and stress-rupture of each lot, and stating that the product conforms to the other technical requirements. This report sha
36、ll include the purchase order number, heat and lot numbers, AMS5843G, size, quantity and a statement of record of specific temperature and time used in the aging cycle (see 3.4). 4.5 Resampling and Retesting Shall be in accordance with AMS2371 (see 4.3 and 4.3.1). 5. PREPARATION FOR DELIVERY 5.1 Siz
37、es Except when exact lengths or multiples of exact lengths are ordered, straight bars will be acceptable in mill lengths of 6 to 24 feet (1.8 to 7.3 m), but not more than 25% of any shipment shall be supplied in lengths of 6 to 9 feet (1.8 to 2.7 m) except that for bars weighing over 25 pounds per f
38、oot (37 kg/m), short lengths down to 2 feet (610 mm) may be supplied. 5.2 Identification Shall be in accordance with AMS2806. 5.3 Packaging The product shall be prepared for shipment in accordance with commercial practice and in compliance with applicable rules and regulations pertaining to the hand
39、ling, packaging, and transportation of the bars 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 Product not conforming to this specific
40、ation, or to modifications authorized by purchaser, will be subject to rejection. SAE INTERNATIONAL AMS5843G Page 6 of 6 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,
41、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 not used in original publications, nor in documents that contain editorial changes only. 8.2 Th
42、is alloy depends on combinations of cold working and aging to attain a variety of combinations of strength and ductility. Mill capabilities currently are limited to cold drawing bars 1-3/4 inches (44.4 mm) and under in nominal diameter to attain the properties specified in 3.5.1. Properties for larg
43、er sizes can be negotiated between purchaser and supplier. 8.3 Hardness conversion tables for metals are presented in ASTM E140. 8.4 Terms used in AMS are clarified in ARP1917. 8.5 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. 8.6 Purchase documents should specify not less than the following: AMS5843G Size of bars desired Quantity of bars desired. PREPARED BY AMS COMMITTEE “F“
