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 theref
2、rom, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.Copyright 2012 SAE InternationalAll rights reserved. No part of this publication may b
3、e 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: +1 724-776-4970 (outside USA)Fax
4、: 724-776-0790Email: CustomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedbackon this Technical Report, please visithttp:/www.sae.org/technical/standards/AMS5920AAEROSPACEMATERIALSPECIFICATIONAMS5920 REV. AIssued 2003-04Revised 2013-02Superseding AMS5920Cobal
5、t-Nickel Alloy, Corrosion and Heat-Resistant, Round Bars19Cr - 36Co - 25Ni - 7.0Mo - 0.50Cb (Nb) - 2.9Ti - 0.20Al - 9.0FeVacuum Induction Plus Vacuum Consumable Electrode MeltedSolution Heat Treated, Work Strengthened and Aged, Modified Strength(Composition similar to UNS R30159)RATIONALEAMS5920A re
6、vises preparation for delivery (5.1) and is a Five Year Review and update of this specification.1. SCOPE1.1 FormThis specification covers a corrosion and heat-resistant, work strengthened and aged cobalt-nickel-chromium alloy in the form of bars 2 inches (50.8 mm) and under in nominal diameter (See
7、8.2).1.2 ApplicationThese bars have been used typically for parts, such as fasteners, requiring a room temperature minimum tensile strength of 170 ksi (1172 MPa) for use up to 850 F (454 C) in applications requiring high ductility to promote toughness and resistance to cracking under shock loading c
8、onditions, but usage is not limited to such applications. This alloy exhibits exceptionally good resistance to corrosion, crevice corrosion, and stress-corrosion cracking.2. APPLICABLE DOCUMENTSThe issue of the following documents in effect on the date of the purchase order forms a part of this spec
9、ification 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 superseding document has been specified, the last published issue of that document shall apply.
10、SAE AMS5920A Page 2 of 52.1 SAE PublicationsAvailable from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org.AMS2261 Tolerances, Nickel, Nickel Alloy, and Cobalt Alloy Bars, Rods, and WireAMS2269
11、 Chemical Check Analysis Limits, Nickel, Nickel Alloys and Cobalt AlloysAMS2371 Quality Assurance Sampling and Testing, Corrosion and Heat-Resistant Steels and Alloys, Wrought Products and Forging StockAMS2750 PyrometryAMS2806 Identification, Bars, Wire, Mechanical Tubing, and Extrusions, Carbon and
12、 Alloy Steels and Corrosion and Heat-Resistant Steels and Alloys2.2 ASTM PublicationsAvailable from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org.ASTM E 8/E 8M Tension Testing of Metallic MaterialsASTM E 18 Rockwell Hardne
13、ss of Metallic MaterialsASTM E 112 Determining Average Grain SizeASTM E 354 Chemical Analysis of High-Temperature, Electrical, Magnetic, and Other Similar Iron, Nickel, and Cobalt Alloys3. TECHNICAL REQUIREMENTS3.1 CompositionShall conform to the percentages by weight shown in Table 1, determined by
14、 wet chemical methods in accordance with ASTM E 354, by spectrochemical methods, or by other analytical methods acceptable to purchaser.TABLE 1 COMPOSITIONElement min maxCarbon - 0.04Manganese - 0.20Silicon - 0.20Phosphorus - 0.020Sulfur - 0.010Chromium 18.00 20.00Cobalt 34.00 38.00Molybdenum 6.00 8
15、.00Columbium (Niobium) 0.25 0.75Titanium 2.50 3.25Aluminum 0.10 0.30Iron 8.00 10.00Boron - 0.03Nickel remainderSAE AMS5920A Page 3 of 53.1.1 Check AnalysisComposition variations shall meet the applicable requirements of AMS2269.3.2 Melting PracticeAlloy shall be produced by multiple melting using va
16、cuum induction followed by vacuum consumable electrode melting practice.3.3 ConditionSolution heat treated, work strengthened, aged, and centerless ground.3.4 Heat TreatmentBars shall be solution heat treated by heating to a temperature within the range 1900 to 1925 F (1038 to 1052 C), holding at th
17、e selected temperature within 25 F (14 C) for 4 to 8 hours, and quenching in water. After work strengthening, bars shall be aged by heating to a temperature within the range 900 to 1100 F (482 to 593 C), holding at the selected temperature within 25 F (14 C) for not less than 4 hours, and cooling at
18、 a rate equivalent to an air cool or faster (See 8.2). Pyrometry shall be in accordance with AMS2750.3.5 PropertiesBars shall conform to the following requirements:3.5.1 Tensile PropertiesAt room temperature, shall be as shown in Table 2, determined in accordance with ASTM E 8/E 8M on specimens as i
19、n 4.3.1 (See 8.2).TABLE 2 - MINIMUM ROOM TEMPERATURE TENSILE PROPERTIESProperty ValueTensile Strength 170 ksi (1172 MPa)Yield Strength at 0.2% Offset 150 ksi (1034 MPa)Elongation in 4D 15%Reduction of Area 40%3.5.2 HardnessShall be not lower than 36 HRC, or equivalent (See 8.3), determined in accord
20、ance with ASTM E 18.3.5.3 Average Grain SizeShall be ASTM No. 4 or finer, determined in accordance with ASTM E 112.3.6 QualityBars, 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 bars.3.7
21、TolerancesShall conform to all applicable requirements of AMS2261.SAE AMS5920A Page 4 of 54. QUALITY ASSURANCE PROVISIONS4.1 Responsibility for InspectionThe vendor of bars shall supply all samples for vendors tests and shall be responsible for the performance of all required tests. Purchaser reserv
22、es 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 TestsAll technical requirements are acceptance tests and shall be performed on each heat or lot as applicable:4.3 Sampling and TestingShall
23、be in accordance with AMS2371 and the following:4.3.1 In testing round bars, specimens for tensile testing shall be of standard proportions in accordance with ASTM E 8/E 8M with either 0.250 inch (6.35 mm) diameter at the reduced parallel gage section or smaller specimens proportional to the standar
24、d when required. All specimens shall be machined from the center of bars 0.800 inch (20.32 mm) and under in nominal diameter and from mid-radius of larger size bars.4.4 ReportsThe vendor of the bars shall furnish with each shipment a report showing the following results of tests and relevant informa
25、tion:4.4.1 For each heatComposition.4.4.2 For each lotTensile propertiesHardnessAverage grain sizeSpecific temperature and time used in the aging cycle (See 3.4).4.4.3 A statement that the product conforms to the other technical requirements.4.4.4 Purchase order numberHeat and lot numbersAMS5920ASiz
26、eQuantity.4.5 Resampling and RetestingShall be in accordance with AMS2371.5. PREPARATION FOR DELIVERY5.1 SizesExcept when exact lengths or multiples of exact lengths are ordered, straight bars will be acceptable in mill lengths of 6 to 20 feet (1.8 to 6.1 m) but not more than 25% of any shipment sha
27、ll 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 (37 kg / m), short lengths down to 2 feet (610 mm) may be supplied.SAE AMS5920A Page 5 of 55.2 IdentificationShall be in accordance with AMS2806.5.3 PackagingBars shall be prepared for shipm
28、ent in accordance with commercial practice and in compliance with applicable rules and regulations pertaining to the handling, packaging, and transportation of the bars to ensure carrier acceptance and safe delivery.6. ACKNOWLEDGMENTA vendor shall mention this specification number and its revision l
29、etter in all quotations and when acknowledging purchase orders.7. REJECTIONSBars not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection.8. NOTES8.1 A change bar (|) located in the left margin is for the convenience of the user in locating area
30、s where technical revisions, not editorial changes, 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 revision. Change bars and (R) are not used in original publications, nor in do
31、cuments that contain editorial changes only.8.2 This alloy depends on combinations of work strengthening and aging to attain a variety of combinations of strength and ductility. Mill capabilities currently are limited to work strengthening (cold drawing) bars of 2 inches (50.8 mm) and under in nomin
32、al diameter to attain the properties specified in 3.5.1.8.3 Hardness conversion tables for metals are presented in ASTM E 140.8.4 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:AMS5920ASize of bars desiredQuantity of bars desired.PREPARED BY AMS COMMITTEE “F”
