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/AMS5842G AEROSPACE MATERIAL SPECIFICATION AMS5842 REV. G Issued 1977-03 Revised 2
5、016-06Superseding AMS5842F 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 and Work Strengthened (Composition similar to UNS R30159)RATIONALE AMS58
6、42G 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 8.3). 1.2 Application These bars have been used typically for ap
7、plications requiring a combination of high strength up to 1100 F (593 C), good tension-tension fatigue strength, toughness, and ductility, but usage is not limited to such applications. This alloy exhibits exceptionally good resistance to corrosion, crevice-corrosion, stress-corrosion cracking, and
8、elevated temperature relaxation (see 8.3). 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 docume
9、nt 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 (i
10、nside 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 SAE INTERNATIONAL AMS5842G Page 2 of 6 AMS2371 Quality Assurance Sampl
11、ing and Testing Corrosion and Heat-Resistant Steels and Alloys, Wrought Products and Forging Stock 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 Used in
12、 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 Materials ASTM E
13、21 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, Rockwe
14、ll 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. TECHNICAL REQU
15、IREMENTS 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 Silicon Ph
16、osphorus 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 38.00 8.00 0.75 3.25 0.30 10.00 0.03 SAE INTERNATIONAL AMS5842G Page 3 of 6 3.1.1 Check Analysis Composition
17、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 and cold drawn. 3.4 Solution Heat Treatment Bars shall b
18、e 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. Pyrometry shall be in accordance with AMS2750. 3.5 Properties Bars shall conform to the following req
19、uirements: 3.5.1 As Solution Heat Treated and Cold Drawn 3.5.1.1 Hardness Shall be not lower than 38 HRC, or equivalent (see 8.2), determined in accordance with ASTM E18. 3.5.1.2 Average Grain Size Shall be ASTM No. 4 or finer, determined in accordance with ASTM E112. 3.5.2 After Aging Bars, 1-3/4 i
20、nches (44.4 mm) and under in nominal diameter, solution heat treated as in 3.4 and suitably cold drawn, shall have the following properties after being aged by heating to a temperature within the range 1200 to 1250 F (649 to 677 C), holding at the selected temperature within 25 F (14 C) for 4 to 4-1
21、/2 hours, and cooling at a rate equivalent to an air cool (see 8.3): 3.5.2.1 Tensile Properties 3.5.2.1.1 At Room Temperature Shall be as shown in Table 2, determined in accordance with ASTM E8/E8M on specimens as in 4.3.1. Table 2 - Minimum room temperature tensile properties Property Value Tensile
22、 Strength Yield Strength at 0.2% Offset Elongation in 4D Reduction of Area 260 ksi (1793 MPa) 250 ksi (1724 MPa) 6% 22% SAE INTERNATIONAL AMS5842G Page 4 of 6 3.5.2.1.2 At 1100 F (593 C) Shall be as shown in Table 3, determined in accordance with ASTM E21 on specimens as in 4.3.1 heated to 1100 F 10
23、 F (593 C 6 C), held at heat for 20 to 30 minutes before testing, and tested at 1100 F 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%
24、 15% 3.5.2.2 Hardness Shall be not lower than 44 HRC, or equivalent (see 8.2), determined in accordance with ASTM E18. 3.5.2.3 Stress-Rupture Properties at 1200 F (649 C) Shall be as follows; testing of notched specimens and of combination smooth-and-notched specimens shall be in accordance with AST
25、M E292 and of smooth specimens as in 4.3.1 in accordance with ASTM E139: 3.5.2.3.1 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 140 ksi (965 MPa) or higher is
26、 applied continuously, shall not rupture in less than 23 hours. The test shall be continued to rupture without change of load. After the 23 hours, if rupture occurs in the notch, the smooth section shall, by suitable means, be continued to rupture or a separate smooth specimen shall be tested to rup
27、ture under the above conditions. Elongation of the smooth section after rupture, measured at room temperature, shall be not less than 5% in 4D. 3.5.2.3.2 As an alternate procedure, separate smooth and notched specimens, machined from adjacent sections of the same piece with gage sections conforming
28、to the respective dimensions shown in ASTM E292, may be tested individually under the conditions of 3.5.2.3.1. 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 specimen shall not ruptu
29、re in less than 23 hours and need not be tested to rupture. 3.5.2.3.3 Tests of 3.5.2.3.1 and 3.5.2.3.2 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 hours, whichever occ
30、urs 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 3.5.2.3.1. 3.6 Quality The product, as received by purchaser, shall be uniform in qua
31、lity 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. SAE INTERNATIONAL AMS5842G Page 5 of 6 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The pro
32、ducer of the product 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 bars conform to specified requirements. 4.2 Classif
33、ication of Tests 4.2.1 Acceptance Tests The following requirements are acceptance tests and shall be performed on each heat or lot as applicable: 4.2.1.1 Composition (3.1) of each heat. 4.2.1.2 Hardness (3.5.1.1) and average grain size (3.5.1.2) of each lot as solution heat treated and cold drawn. 4
34、.2.1.3 Tensile properties at room temperature of each lot after aging (3.5.2.1.1). 4.2.1.4 Tolerances (3.7). 4.2.2 Periodic Tests Tensile properties at 1100 F (593 C) (3.5.2.1.2), hardness (3.5.2.2), and stress-rupture properties (3.5.2.3) after aging are periodic tests and shall be performed at a f
35、requency selected by the producer unless frequency of testing is specified by purchaser. 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 standard proportions in accordance with ASTM E8/E8M w
36、ith 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 3.5.2.3. All specimens shall be machined from the center of bars 0.800 inch (20.32 mm) and under in n
37、ominal diameter or least 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 melt in the case of metal processed by mu
38、ltiple melting operations), and the results of tests for composition of each heat and for hardness, average grain size and tensile properties of each lot, and stating that the product conforms to the other technical requirements. This report shall include the purchase order number, heat and lot numb
39、ers, AMS5842G, size, quantity and a statement of record of specific temperature and time used in the laboratory aging cycle (see 3.5.2). 4.5 Resampling and Retesting Shall be in accordance with AMS2371 (see 4.3 and 4.3.1). SAE INTERNATIONAL AMS5842G Page 6 of 6 5. PREPARATION FOR DELIVERY 5.1 Sizes
40、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 foot
41、 (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 handlin
42、g, 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 specificati
43、on, 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 been made to the previous issue of th
44、is 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 Hardness conversion tables for metals are pr
45、esented in ASTM E140. 8.3 This 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 of 1-3/4 inches (44.4 mm) and under in nominal diameter to attain the properties specifie
46、d in 3.5.2.1. Properties of larger sizes can be negotiated between purchaser and supplier. 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: AMS5842G Size of bars desired Quantity of bars desired. PREPARED BY AMS COMMITTEE “F“
