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 2013 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/AMS5923AEROSPACEMATERIALSPECIFICATIONAMS5923Issued 2013-05Steel, Corrosion-Resistant, Bars, Wire, and For
5、gings 17Cr - 0.52Mo (0.95 - 1.20C) (440C)for Bearing Applications(Composition similar to UNS S44004)RATIONALEAMS5923 is a new specification for a corrosion-resistant steel containing the technical requirements of AMS5880C with the exception of not containing the longitudinal macrostructure evaluatio
6、n.1.1 Form This specification covers a corrosion-resistant steel in the form of bars, wire, forgings, and forging stock.1.2 Application These products have been used typically for anti-friction bearing parts requiring resistance to both corrosion and wear with hardness usually not lower than 58 HRC
7、after hardening and tempering, but usage is not limited to such applications.2. APPLICABLE DOCUMENTSThe 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
8、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.2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA
9、15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org.AMS2241 Tolerances, Corrosion and Heat-Resistant Steel, Iron Alloy, Titanium, and Titanium Alloy Bars and WireAMS2248 Chemical Check Analysis Limits, Corrosion and Heat-Resistant Steels and Alloys, Marag
10、ing and Other Highly-Alloyed Steels, and Iron AlloysAMS2371 Quality Assurance Sampling and Testing, Corrosion and Heat-Resistant Steels and Alloys, Wrought Products and Forging StockAMS2374 Quality Assurance Sampling and Testing, Corrosion and Heat-Resistant Steel and Alloy ForgingsAMS2806 Identific
11、ation, Bars, Wire, Mechanical Tubing, and Extrusions, Carbon and Alloy Steels and Corrosion and Heat-Resistant Steels and AlloysSAE AMS5923 Page 2 of 7AMS2808 Identification, ForgingsAS1182 Standard Stock Removal Allowance, Aircraft-Quality and Premium Aircraft-Quality Steel Bars and Mechanical Tubi
12、ng2.2 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 A 370 Mechanical Testing of Steel ProductsASTM E 45 Determining the Inclusion Content of SteelASTM E 112 Determining Average Grain S
13、izeASTM E 353 Chemical Analysis of Stainless, Heat-Resisting, Maraging, and Other Similar Chromium-Nickel-Iron AlloysASTM E 381 Macroetch Testing Steel Bars, Billets, Blooms, and ForgingsASTM E 384 Knoop and Vickers Hardness of Materials3. TECHNICAL REQUIREMENTS 3.1 Composition Shall conform to the
14、percentages 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.TABLE 1 - COMPOSITIONElement min maxCarbon 0.95 1.20Manganese - 1.00Silicon - 1.00Phosphorus - 0.040Sulfur - 0.
15、030Chromium 16.00 18.00Molybdenum 0.40 0.65Nickel - 0.75Copper - 0.753.1.1 Check AnalysisComposition variations shall meet the applicable requirements of AMS2248.3.2 Condition The product shall be supplied in the following condition; hardness and tensile strength shall be determined in accordance wi
16、th ASTM A 370.3.2.1 BarsShall have hardness not higher than 255 HB, or equivalent (See 8.2).SAE AMS5923 Page 3 of 73.2.1.1 Bars 2.750 Inches (69.85 mm) and Under in Nominal Diameter or Least Distance Between Parallel Sides, and All HexagonsShall be cold finished.3.2.1.2 Bars, Other Than Hexagons, Ov
17、er 2.750 Inches (69.85 mm) in Nominal Diameter or Least Distance Between Parallel SidesShall be hot finished.3.2.2 WireCold finished having tensile strength not higher than 130 ksi (896 MPa) or equivalent hardness (See 8.3).3.2.3 ForgingsAs ordered.3.2.4 Forging StockAs ordered by the forging manufa
18、cturer.3.3 Properties The product shall conform to the following requirements; hardness testing shall be performed in accordance with ASTM A 370.3.3.1 Macrostructure Visual examination of transverse full cross-sections from bars, wire, billets, and forging stock, etched in hot hydrochloric acid in a
19、ccordance with ASTM E 381, shall show no pipe or cracks.3.3.2 Micro-Inclusion RatingAt least one specimen from each ingot tested, as well as two-thirds of the total number of specimens and the average of all specimens, shall not exceed the limits shown in Table 2, determined in accordance with ASTM
20、E 45, Method A, except that the length of any inclusion shall be not greater than 0.025 inch (0.64 mm).TABLE 2 - MICRO-INCLUSION RATING LIMITSType A B C DThin 2.0 2.5 2.5 2.0Heavy 1.5 1.5 2.0 1.53.3.3 Response to Heat TreatmentSpecimens as in 4.3.3, protected by suitable means or treated in a neutra
21、l atmosphere to minimize scaling and prevent either carburization or decarburization, shall have hardness not lower than 58 HRC, or equivalent (See 8.2), after being heated to 1925 F 25 (1052 C 14), held at heat for 30 minutes 3, and quenched in oil.3.3.3.1 Sub-zero cooling to -100 F 20 (-73 C 11),
22、holding at that temperature for 2 hours 0.25, and warming in air to room temperature, after heating as in 3.3.3, is optional.3.3.4 Average Grain SizeShall be ASTM No. 6 or finer, determined in accordance with ASTM E 112 on specimens hardened in accordance with the procedure of 3.3.3.SAE AMS5923 Page
23、 4 of 73.3.5 Decarburization 3.3.5.1 Bars and wire ordered ground, turned, or polished shall be free from decarburization on the ground, turned, or polished surfaces.3.3.5.2 Allowable decarburization of bars, wire, and billets ordered for redrawing or forging or to specified microstructural requirem
24、ents shall be agreed upon by purchaser and vendor.3.3.5.3 Decarburization of bars and wire to which 3.3.5.1 or 3.3.5.2 is not applicable shall be not greater than shown in Table 3.TABLE 3A - MAXIMUM DECARBURIZATION, INCH/POUND UNITSNominal Diameter or DistanceBetween Parallel SidesInchesTotal Depth
25、ofDecarburizationInchUp to 0.500, incl 0.010Over 0.500 to 1.000, incl 0.015Over 1.000 to 1.500, incl 0.020Over 1.500 to 2.000, incl 0.025Over 2.000 to 2.500, incl 0.030Over 2.500 to 3.000, incl 0.035Over 3.000 to 4.000, incl 0.045TABLE 3B - MAXIMUM DECARBURIZATION, SI UNITSNominal Diameter or Distan
26、ceBetween Parallel SidesMillimetersTotal Depth ofDecarburizationMillimetersUp to 12.70, incl 0.25Over 12.70 to 25.40, incl 0.38Over 25.40 to 38.10, incl 0.51Over 38.10 to 50.80, incl 0.64Over 50.80 to 63.50, incl 0.76Over 63.50 to 76.20, incl 0.89Over 76.20 to 101.60, incl 1.143.3.5.4 Decarburizatio
27、n shall be measured by the metallographic method, by HR30N scale hardness testing method, or by the microhardness traverse method using microhardness testing in accordance with ASTM E 384. The hardness method(s) shall be conducted on a hardened but untempered specimen protected during heat treatment
28、 to prevent changes in surface carbon content. Depth of decarburization, when measured by hardness method, is defined as the perpendicular distance from the surface to the depth under that surface below which there is no further increase in hardness. Such measurements shall be far enough away from a
29、ny adjacent surface to be uninfluenced by decarburization on the adjacent surface. In case of dispute, the depth of decarburization determined using the microhardness traverse method shall govern. 3.3.5.4.1 When determining the depth of decarburization, it is permissible to disregard local areas pro
30、vided the decarburization of such areas does not exceed the above limits by more than 0.005 inch (0.13 mm) and the width is 0.065 inch (1.65 mm) or less.3.4 QualityThe product, as received by purchaser, shall be uniform in quality and condition, sound, and free from foreign materials and from imperf
31、ections detrimental to usage of the product.SAE AMS5923 Page 5 of 73.4.1 Bars and wire ordered hot rolled or cold drawn or ground, turned, or polished shall, after removal of the standard stock removal allowance in accordance with AS1182, be free from seams, laps, tears, and cracks open to the groun
32、d, turned, or polished surface.3.4.2 Grain flow of die forgings, except in areas which contain flash-line end grain, shall follow general contour of the forgings showing no evidence of reentrant grain flow.3.5 TolerancesBars and wire shall conform to all applicable requirements of AMS2241.4. QUALITY
33、 ASSURANCE PROVISIONS4.1 Responsibility for InspectionThe vendor of the product shall supply all samples for vendors 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 tha
34、t the product conforms to specified requirements.4.2 Classification of Tests4.2.1 Acceptance TestsComposition (3.1), condition (3.2), macrostructure (3.3.1), micro-inclusion rating (3.3.2), response to heat treatment (3.3.3), average grain size (3.3.4), decarburization (3.3.5), and tolerances (3.5)
35、are acceptance tests and shall be performed on each heat or lot as applicable.4.2.2 Grain flow of die forgings (3.4.2) is a periodic test and shall be performed at a frequency selected by the vendor unless frequency of testing is specified by purchaser.4.3 Sampling and TestingShall be as follows.4.3
36、.1 Bars, Wire, and Forging StockIn accordance with AMS2371.4.3.2 ForgingsIn accordance with AMS2374.4.3.3 Specimens for response to heat treatment (3.3.3) of bars, wires, and billets shall be not less than 0.375 inch (9.52 mm) in thickness. Minimum dimensions in other directions shall be either thos
37、e of the product thickness or 1.125 1.125 inches (28.58 28.58 mm).4.4 ReportsThe vendor of the product shall furnish with each shipment a report showing the results of tests for composition, transverse macrostructure and micro-inclusion rating of each heat and for condition, response to heat treatme
38、nt, andaverage grain size of each lot, stating if sub-zero cooling was used for response to heat treatment, and stating that the product conforms to the other technical requirements. This report shall include the purchase order number, heat and lot numbers, AMS5923, size, and quantity. If forgings a
39、re supplied, the size and melt source of stock used to make the forgings shall also be included.SAE AMS5923 Page 6 of 74.5 Resampling and RetestingShall be as follows:4.5.1 Bars, Wire, and Forging StockIn accordance with AMS2371.4.5.2 ForgingsIn accordance with AMS2374.5. PREPARATION FOR DELIVERY 5.
40、1 SizesExcept when exact lengths or multiples of exact lengths are ordered, straight bars and wire will be acceptable in mill lengths of 6 to 20 feet (1.8 to 6.1 m) but not more than 10% of any shipment shall be supplied in lengths shorter than 10 feet (3 m).5.2 IdentificationShall be as follows5.2.
41、1 Bars and WireIn accordance with AMS2806.5.2.2 ForgingsIn accordance with AMS2808.5.2.3 Forging StockAs agreed upon by purchaser and vendor.5.3 PackagingThe product shall be prepared for shipment in accordance with commercial practice and in compliance with applicable rules and regulations pertaini
42、ng to the handling, packaging, and transportation of the product to ensure carrier acceptance and safe delivery.6. ACKNOWLEDGMENTA vendor shall mention this specification number in all quotations and when acknowledging purchase orders.7. REJECTIONSProduct not conforming to this specification, or to
43、modifications authorized by purchaser, will be subject to rejection.SAE AMS5923 Page 7 of 78. NOTES8.1 A change bar (|) 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 this docum
44、ent. 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 presented i
45、n ASTM E 140.8.3 Tensile strengths to hardness conversions are presented in ASTM A 370.8.4 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:AMS5923Product form and size or part number of product desiredQuantity of product desired.PREPARED BY AMS COMMITTEE “F”
