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 revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions.Copyright 2013 SAE InternationalAll rights reserved. No part of this publi
3、cation 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: +1 724-776-4970 (out
4、side USA)Fax: 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/AMS5900BAEROSPACE MATERIAL SPECIFICATIONAMS5900 REV. BIssued 1981-01Revised 2000-02Reaffirmed
5、 2013-08Superseding AMS5900ASteel Bars, Forgings, and Tubing, Corrosion Resistant14Cr - 2.1Mo - 0.30Cb - 1.0V (1.05 - 1.15C)Premium Aircraft Quality for Bearing Applications, Double Vacuum Melted(Composition similar to UNS S42800)RATIONALEAMS5900B has been reaffirmed to comply with the SAE 5-year Re
6、view policy.1. SCOPE1.1 FormThis specification covers a premium-aircraft-quality, corrosion-resistant steel in the form of bars, wire, forgings, mechanicaltubing, and forging stock.1.2 ApplicationThese products have been used typically for critical bearing components requiring a through-hardening, c
7、orrosion-resistant steel operating under heavy loads and high speeds at moderate temperatures and subject to very rigid inspection standards, 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 form a p
8、art of this specification 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 canceled and no superseding document has been specified, the last published issue of that docume
9、nt shall apply.2.1 SAE PublicationsAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.AMS 2241 Tolerances, Corrosion and Heat Resistant Steel, Iron Alloy, Titanium, and Titanium Alloy Bars and WireMAM 2241 Tolerances, Metric, Corrosion and Heat Resistant Steel, Iron Alloy, Titaniu
10、m, and Titanium Alloy Bars and WireSAE INTERNATIONAL AMS5900B Page 2 of 10AMS 2243 Tolerances, Corrosion and Heat Resistant Steel TubingMAM 2243 Tolerances, Metric, Corrosion and Heat Resistant Steel TubingAMS 2248 Chemical Check Analysis Limits, Corrosion and Heat Resistant Steels and Alloys, Marag
11、ing and Other Highly-Alloyed Steels, and Iron AlloysAMS 2300 Cleanliness, Premium Aircraft-Quality Steel, Magnetic Particle Inspection ProcedureMAM 2300 Cleanliness, Premium Aircraft-Quality Steel, Magnetic Particle Inspection Procedure, Metric (SI) MeasurementAMS 2371 Quality Assurance Sampling and
12、 Testing, Corrosion and Heat Resistant Steels and Alloys, Wrought Products and Forging StockAMS 2374 Quality Assurance Sampling and Testing, Corrosion and Heat Resistant Steel and Alloy ForgingsAMS 2806 Identification, Bars, Wire, Mechanical Tubing, and Extrusions, Carbon and Alloy Steels, Corrosion
13、 and Heat Resistant Steels and AlloysAMS 2808 Identification, ForgingsAS1182 Standard Machining Allowance, Aircraft Quality and Premium Aircraft Quality Steel Bars and Mechanical Tubing2.2 ASTM PublicationsAvailable from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.ASTM A 370 Mechan
14、ical Testing of Steel ProductsASTM A 604 Macroetch Testing of Consumable Electrode Remelted Steel Bars and BilletsASTM E 45 Determining the Inclusion Content of SteelsASTM E 112 Determining the Average Grain SizeASTM E 353 Chemical Analysis of Stainless, Heat-Resisting, Maraging, and Other Similar C
15、hromium-Nickel-Iron Alloys3. TECHNICAL REQUIREMENTS3.1 CompositionShall conform to the 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.SAE INTERNATIONAL AMS590
16、0B Page 3 of 10TABLE 1 - COMPOSITIONElement min maxCarbon 1.05 1.15Manganese 0.25 0.50Silicon 0.20 0.40Phosphorus - 0.015Sulfur - 0.010Chromium 13.75 14.75Molybdenum 1.90 2.25Columbium 0.25 0.35Vanadium 0.90 1.15Nickel - 0.35 Copper - 0.35 3.1.1 Check AnalysisComposition variations shall meet the ap
17、plicable requirements of AMS 2248.3.2 Melting PracticeProduct shall be multiple melted using vacuum induction melting practice followed by vacuum consumable electrode remelting.3.3 ConditionThe product shall be supplied in the following condition; hardness and tensile strength shall be determined in
18、 accordance with ASTM A 370:3.3.1 BarsAnnealed having hardness not higher than 255 HB, or equivalent (See 8.2).3.3.1.1 All hexagons and other bars 2.75 inches (69.8 mm) and under in nominal diameter or distance between parallel sides shall be cold finished.3.3.1.2 Bars, other than hexagons, over 2.7
19、5 inches (69.8 mm) in nominal diameter or distance between parallel sides shall be hot finished.3.3.2 WireCold finished and annealed having a tensile strength not higher than 130 ksi (896 MPa) except that for wire 0.062 inch (1.57 mm) and under in nominal diameter tensile strength shall be as agreed
20、 upon by purchaser and vendor.3.3.3 ForgingsAs ordered.SAE INTERNATIONAL AMS5900B Page 4 of 103.3.4 Mechanical TubingAnnealed and cold finished having hardness not higher than 293 HB, or equivalent (See 8.2).3.3.5 Forging StockAs ordered by the forging manufacturer.3.4 PropertiesThe product shall co
21、nform to the following requirements; hardness testing shall be performed in accordance with ASTM A 370.3.4.1 MacrostructureVisual examination of transverse full cross-sections from bars, billets, tube rounds, and forging stock, etched in hot hydrochloric acid in accordance with ASTM A 604, shall sho
22、w no pipe or cracks. Porosity, segregation, inclusions, andother imperfections for product 225 square inches (1452 cm2) and under in nominal cross-sectional area shall be no worse than the macrographs of ASTM A 604 shown in Table 2.TABLE 2 - MACROSTRUCTURE LIMITSClass Condition Severity1Freckles A2
23、White Spots A3 Radial Segregation B4 Ring Pattern B3.4.2 Micro-Inclusion RatingNo specimen shall exceed the limits shown in Table 3, determined in accordance with ASTM E 45, Method D.TABLE 3 - MICRO-INCLUSION LIMITSAThinAHeavyBThinBHeavyCThinCHeavyDThinDHeavyWorst Field Severity 1.5 1.0 1.0 1.0 1.0
24、1.0 1.5 1.0Worst FieldFrequency, max x 1 x 1 x 1 3 1Total Rateable Fields,Frequency, max y 1 y 1 y 1 8 1xCombined A+B+C; not more than 3 fieldsyCombined A+B+C; not more than 8 fieldsSAE INTERNATIONAL AMS5900B Page 5 of 103.4.2.1 A rateable field is defined as one which has a type A, B, C, or D inclu
25、sion rating of at least No. 1.0 thin or heavy in accordance with the Jernkontoret chart, Plate III, ASTM E 45.3.4.3 Response to Heat TreatmentSpecimens (See 4.3.3) shall have hardness not lower than 60 HRC, or equivalent (See 8.2), after being treated as follows in a neutral atmosphere or neutral sa
26、lt to minimize scale and prevent either carburization or decarburization: 3.4.3.1 Preheat at 1500 F 10 (816 C 6) for not less than 15 minutes.3.4.3.2 Heat to 2100 F 25 (1149 C 14), hold at heat for 7 to 10 minutes. Oil quench to room temperature or, preferably, quench into salt maintained at 1050 to
27、 1150 F (566 to 621 C), hold at temperature for 2 minutes 0.2, and cool in air to room temperature.3.4.3.3 Stress relieve by heating to 300 F 15 (149 C 8), holding at temperature for 60 minutes 5, and cooling in air to room temperature.3.4.3.4 Subzero cool to -100 F 10 (-73 C 6), hold at temperature
28、 for not less than 15 minutes, and allow to return to room temperature in air.3.4.3.5 Temper within 4 hours after the subzero cool by heating to 975 F 15 (524 C 8), holding at heat for 2 hours 0.25, and cooling in air to room temperature.3.4.4 Decarburization3.4.4.1 Bars, wire, and mechanical tubing
29、 ordered ground, turned, or polished shall be free from decarburization on the ground, turned, or polished surfaces. 3.4.4.2 Allowable decarburization of bars, wire, billets, and tubing ordered for redrawing or forging or to specified microstructural requirements shall be as agreed upon by purchaser
30、 and vendor.3.4.4.3 Decarburization of bars to which 3.4.4.1 or 3.4.4.2 is not applicable shall be not greater than shown in Table 4.TABLE 4A - MAXIMUM DECARBURIZATION, INCH/POUND UNITSNominal Diameter or DistanceBetween Parallel SidesInchesTotal Depth ofDecarburizationInchUp to 0.500, incl 0.015Ove
31、r 0.500 to 1.000, incl 0.030Over 1.000 to 2.000, incl 0.040Over 2.000 to 3.000, incl 0.050Over 3.000 to 4.000, incl 0.065Over 4.000 to 5.000, incl 0.095SAE INTERNATIONAL AMS5900B Page 6 of 10TABLE 4B - MAXIMUM DECARBURIZATION, SI UNITSNominal Diameter or DistanceBetween Parallel SidesMillimetersTota
32、l Depth ofDecarburizationMillimetersUp to 12.70, incl 0.38Over 12.70 to 25.40, incl 0.76Over 25.40 to 50.80, incl 1.02Over 50.80 to 76.20, incl 1.27Over 76.20 to 101.60, incl 1.65Over 101.60 to 127.00, incl 2.413.4.4.4 Decarburization of tubing to which 3.4.4.1 or 3.4.4.2 is not applicable shall be
33、not greater than shown in Table 5.TABLE 5A - MAXIMUM DECARBURIZATION, INCH/POUND UNITSNominal Outside DiameterInchesTotal Depth ofDecarburizationInchUp to 1.000, incl 0.025Over 1.000 to 2.000, incl 0.035Over 2.000 to 3.000, incl 0.045Over 3.000 to 4.000, incl 0.055Over 4.000 to 5.000, incl 0.080TABL
34、E 5B - MAXIMUM DECARBURIZATION, SI UNITSNominal Outside DiameterMillimetersTotal Depth ofDecarburizationMillimetersUp to 25.40, incl 0.64Over 25.40 to 50.80, incl 0.89Over 50.80 to 76.20, incl 1.14Over 76.20 to 101.60, incl 1.40Over 101.60 to 127.00, incl 2.033.4.4.5 Decarburization shall be measure
35、d by the microscopic method, by HR30N scale hardness testing method, or by the microhardness traverse method on hardened and sub-zero cooled but untempered specimens protected during heat treatment to prevent changes in surface carbon content. Depth of decarburization, when measured by a hardness me
36、thod, 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 an adjacent surface to be uninfluenced by decarburization on the adjacent surface. In case of dispute,
37、 the depth of decarburization determined using the microhardness traverse method shall govern.3.4.4.5.1 When determining the depth of decarburization, it is permissible to disregard local areas provided the decarburization of such areas does not exceed the above limits by more than 0.005 inch (0.13
38、mm) and the width is 0.065 inch (1.65 mm) or less.SAE INTERNATIONAL AMS5900B Page 7 of 103.4.5 Average Grain SizeShall be ASTM 7 or finer determined in accordance with ASTM E 112 (See 8.4).3.5 QualityThe product, as received by purchaser, shall be uniform in quality and condition, sound, and free fr
39、om foreign materials and from imperfections detrimental to usage of the product.3.5.1 Steel shall be premium aircraft-quality conforming to AMS 2300 or MAM 2300.3.5.2 Bars and tubing ordered hot rolled or cold drawn, or ground, turned, or polished, shall, after removal of the standard machining allo
40、wance in accordance with AS1182, be free from seams, laps, tears, and cracks open to the ground, turned, or polished surface.3.5.3 Forgings shall have substantially uniform macrostructure. Standards for acceptance shall be as agreed upon by purchaser and vendor.3.5.4 Grain flow of die forgings, exce
41、pt in areas which contain flash-line end grain, shall follow the general contour of the forgings showing no evidence of re-entrant grain flow.3.6 TolerancesShall conform to all applicable requirements of the following:3.6.1 Bars and WireAMS 2241 and MAM 2241.3.6.2 Mechanical TubingAMS 2243 and MAM 2
42、243.4. QUALITY 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
43、 to ensure that the product conforms to specified requirements.4.2 Classification of Tests4.2.1 Acceptance TestsThe following are acceptance tests and shall be performed on each heat or lot as applicable: composition (3.1), condition (3.2), macrostructure rating (3.4.1), micro-inclusion rating (3.4.
44、2), response to heat treatment (3.4.3), decarburization (3.4.4), average grain size (3.4.5), quality (3.5.2), and tolerances (3.6).4.2.2 Periodic TestsFrequency-severity cleanliness rating (3.5.1), and grain flow of die forgings (3.5.2.4) are periodic tests and shall be performed at a frequency sele
45、cted by the vendor unless frequency of testing is specified by purchaser.SAE INTERNATIONAL AMS5900B Page 8 of 104.3 Sampling and TestingShall be in accordance with the following:4.3.1 Bars, Wire, Mechanical Tubing and Forging StockAMS 2371.4.3.2 ForgingsAMS 2374.4.3.3 Samples for response to heat tr
46、eatment (3.4.3) of bars and billets shall be the full cross section of the product ground on both faces normal to the axis so that the length is 0.375 to 0.500 inch (9.52 to 12.70 mm). Specimens from mechanical tubing shall be full sections of the tubing, shall have wall thickness of 0.625 inch (15.
47、88 mm) or less with wall thicknesses over 0.625 inch (15.88 mm) being turned to 0.625 inch 0.010 (15.88 mm 0.25) and shall be ground on both faces normal to the axis so that length is 0.375 to 0.500 inch (9.52 to 12.70 mm).4.4 ReportsThe vendor of the product shall furnish with each shipment a repor
48、t showing the results of tests for chemical composition, macrostructure and micro-inclusion rating for each heat and for condition, response to heat treatment and average grain size of each lot, and stating that the product conforms to the other technical requirements. This report shall include the
49、purchase order number, heat and lot numbers, AMS 5900B, size, and quantity. If forgings are supplied, the size and melt source of stock used to make the forgings shall also be included.4.5 Resampling and RetestingShall be as follows:4.5.1 Bars, Wire, Mechanical Tubing and Forging StockIn accordance with AMS 2371.4.5.2 ForgingsIn accordance with AMS 2374.5. PREPARATION FOR DELIVERY5.1
