1、AEROSPACE MATERIAL SPECIFICATIONAMS6264 REV. LIssued 1942-04Reaffirmed 2006-02Revised 2014-08Superseding AMS6264KSteel, Carburizing Grade, Bars, Forgings, and Tubing1.2Cr - 3.2Ni - 0.12Mo (0.14 - 0.20C) (9317)(Composition similar to UNS K44414)RATIONALEAMS6264L results from a Five Year Review and up
2、date of this specification that revises macrostructure and reporting requirements.1. SCOPE1.1 FormThis specification covers an aircraft-quality, low-alloy steel in the form of bars, forgings, mechanical tubing, and forging stock.1.2 ApplicationThese products have been used typically for carburized p
3、arts which require high minimum core hardness with a narrow range, but usage is not limited to such applications. 1.2.1 The core may be difficult to machine after hardening.2. APPLICABLE DOCUMENTSThe issue of the following documents in effect on the date of the purchase order forms a part of this sp
4、ecification 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 appl
5、y.2.1 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.AMS2251 Tolerances, Low-Alloy Steel BarsAMS2253 Tolerances, Carbon and Alloy Steel TubingAMS2259 Chemical Ch
6、eck Analysis Limits, Wrought Low-Alloy and Carbon Steels_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 particul
7、ar use, including any patent infringement arising therefrom, 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 2014 SAE
8、 InternationalAll rights reserved. No part of this publication 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: 877-6
9、06-7323 (inside USA and Canada)Tel: +1 724-776-4970 (outside 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/AMS6264LSAE INTERNATIONAL AMS6264L Pa
10、ge 2 of 6AMS2301 Steel Cleanliness, Aircraft Quality, Magnetic Particle Inspection ProcedureAMS2370 Quality Assurance Sampling and Testing, Carbon and Low-Alloy Steel Wrought Products and Forging StockAMS2372 Quality Assurance Sampling and Testing, Carbon and Low-Alloy Steel ForgingsAMS2806 Identifi
11、cation, Bars, Wire, Mechanical Tubing, and Extrusions, Carbon and Alloy Steels and Corrosion and Heat-Resistant Steels and AlloysAMS2808 Identification, ForgingsAS1182 Standard Stock Removal Allowance, Aircraft-Quality and Premium Aircraft-Quality Steel Bars and Mechanical Tubing2.2 ASTM Publication
12、sAvailable 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 255 Determining Hardenability of SteelASTM A 370 Mechanical Testing of Steel ProductsASTM E 112 Determining Average Grain SizeASTM E 350 Chemical Analysis
13、 of Carbon Steel, Low-Alloy Steel, Silicon Electrical Steel, Ingot Iron, and Wrought IronASTM E 381 Macroetch Testing, Steel Bars, Billets, Blooms, and Forgings3. TECHNICAL REQUIREMENTS3.1 CompositionShall conform to the percentages by weight shown in Table 1, determined by wet chemical methods in a
14、ccordance with ASTM E 350, by spectrochemical methods, or by other analytical methods acceptable to purchaser.TABLE 1 - COMPOSITIONElement min maxCarbonManganeseSiliconPhosphorusSulfurChromiumNickelMolybdenumCopper0.140.400.15-1.003.000.08-0.20 0.70 0.35 0.0250.0251.40 3.50 0.15 0.35 3.1.1 Check Ana
15、lysisComposition variations shall meet the applicable requirements of AMS2259.3.2 ConditionThe product shall be supplied in the following condition unless another condition is authorized by purchaser; hardness and tensile strength shall be determined in accordance with ASTM A 370:SAE INTERNATIONAL A
16、MS6264L Page 3 of 63.2.1 Bars3.2.1.1 Bars 0.500 Inch (12.70 mm) and Under in Nominal Diameter or Least Distance Between Parallel SidesCold finished having tensile strength not higher than 125 ksi (862 MPa) or equivalent hardness (See 8.2).3.2.1.2 Bars Over 0.500 Inch (12.70 mm) in Nominal Diameter o
17、r Least Distance Between Parallel SidesHot finished and annealed, unless otherwise ordered, having hardness not higher than 229 HB, or equivalent (See 8.3). Bars ordered cold finished may have hardness as high as 248 HB, or equivalent (See 8.3).3.2.1.3 Bar shall not be cut from plate (Also see 4.4.2
18、).3.2.2 ForgingsAs ordered 3.2.3 Mechanical TubingCold finished, unless otherwise ordered, having hardness not higher than 25 HRC, or equivalent (See 8.3). Tubing ordered hot finished and annealed shall have hardness not higher than 99 HRB, or equivalent (See 8.3).3.2.4 Forging StockAs ordered by th
19、e forging manufacturer.3.3 PropertiesThe product shall conform to the following requirements; hardness testing shall be performed in accordance with ASTM A 370:3.3.1 MacrostructureVisual examination of transverse full cross-sections from bars, billets, tube rounds, and forging stock, etched in hot h
20、ydrochloric acid in accordance with ASTM E 381, shall show no pipes or cracks. Porosity, segregation, inclusions, and other imperfections shall be no worse than the macrographs of ASTM E 381 shown in Table 2.TABLE 2 - MACROGRAPHIC STANDARDSCross-Sectional AreaSquare InchesCross-Sectional AreaSquare
21、Centimeters MacrographsUp to 36, incl Up to 232, incl S2 - R1 - C2Over 36 to 133, incl Over 232 to 858, incl S2 - R2 - C3Over 133 Over 858 Note 1Note 1 Limits for larger sizes shall be agreed upon by purchaser and vendor. The purchaser shall have written approval of the agreement from the cognizant
22、engineering organization.3.3.2 Average Grain Size of Bar, Forgings, and TubingShall be ASTM No. 5 or finer, determined in accordance with ASTM E 112.3.3.3 Hardenability of Each HeatShall be J1/16 inch (1.7 mm) = 48 HRC maximum and J6/16 inch (9.5 mm) = 40 HRC minimum, determined on the standard end-
23、quench test specimen in accordance with ASTM A 255 except that the steel shall be normalized at 1700 F 10 (927 C 6) and the test specimen austenitized at 1500 F 10 (816 C 6).SAE INTERNATIONAL AMS6264L Page 4 of 63.4 QualityThe product, as received by purchaser, shall be uniform in quality and condit
24、ion, sound, and free from foreign materials and from imperfections detrimental to usage of the product.3.4.1 Steel shall be aircraft quality conforming to AMS2301.3.4.2 Bars and mechanical tubing ordered hot rolled or cold drawn, or ground, turned, or polished shall, after removal of the standard st
25、ock removal allowance in accordance with AS1182, be free from seams, laps, tears, and cracks open to the machined, ground, turned, or polished surfaces.3.4.3 Grain flow of die forgings, except in areas that contain flash-line end grain, shall follow the general contour of the forgings showing no evi
26、dence of reentrant grain flow.3.5 TolerancesShall be as follows:3.5.1 BarsIn accordance with AMS2251.3.5.2 Mechanical TubingIn accordance with AMS2253.4. QUALITY ASSURANCE PROVISIONS4.1 Responsibility for InspectionThe vendor of the product shall supply all samples for vendors tests and shall be res
27、ponsible 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 product conforms to specified requirements.4.2 Classification of Tests4.2.1 Acceptance TestsComposition (3.1), condition (3.2), macro
28、structure (3.3.1), average grain size (3.3.2), hardenability (3.3.3), frequency-severity cleanliness rating (3.4.1) and tolerances (3.5) are acceptance tests and shall be performed on each heat or lot as applicable.4.2.2 Periodic TestsGrain flow of die forgings (3.4.3) is a periodic test and shall b
29、e performed at a frequency selected by the vendor unless a frequency is specified by purchaser.4.3 Sampling and TestingShall be as follows:4.3.1 Bars, Mechanical Tubing, and Forging StockIn accordance with AMS2370.4.3.2 ForgingsIn accordance with AMS2372.SAE INTERNATIONAL AMS6264L Page 5 of 64.4 Rep
30、orts4.4.1 The producer of bar, forgings, and mechanical tubing shall furnish with each shipment a report showing the producer identity and country where the metal was melted (e. g., final melt in the case of metal processed by multiple melting operations), the results of tests for composition, macro
31、structure, hardenability, and frequency-severity cleanliness rating of each heat, and for hardness and average grain size 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 numbers, AMS6264L, produ
32、ct form and size or part number, and quantity. If forgings are supplied, heat and the size and melt source of stock used to make the forgings shall also be included.4.4.2 Report the nominal metallurgically worked cross sectional size and the cut size, if different (Also see 3.2.1.3)4.4.3 The produce
33、r of forging stock shall furnish with each shipment a report showing the producer identity and country where the metal was melted (e. g., final melt in the case of metal processed by multiple melting operations) and the results of tests for composition, macrostructure, hardenability, and frequency-s
34、everity cleanliness rating of each heat. This report shall include the purchase order number, heat number, AMS6264L, size and quantity.4.5 Resampling and RetestingShall be as follows:4.5.1 Bars, Mechanical Tubing, and Forging StockIn accordance with AMS2370.4.5.2 ForgingsIn accordance with AMS2372.5
35、. PREPARATION FOR DELIVERY5.1 SizesExcept when exact lengths or multiples of exact lengths are ordered, straight bars and tubing 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 Identif
36、ication5.2.1 Bars and Mechanical TubingIn accordance with AMS2806.5.2.2 ForgingsIn accordance with AMS2808.5.2.3 Forging StockAs agreed upon by purchaser and vendor.5.3 Protective TreatmentBars and tubing ordered cold drawn, cold rolled, ground, turned, or polished shall be protected from corrosion
37、prior to shipment.SAE INTERNATIONAL AMS6264L Page 6 of 65.4 PackagingThe product shall be prepared for shipment in accordance with commercial practice and in compliance with applicable rules and regulations pertaining to the handling, packaging, and transportation of the product to ensure carrier ac
38、ceptance and safe delivery.6. ACKNOWLEDGMENTA vendor shall include this specification number and its revision letter in all quotations and when acknowledging purchase orders.7. REJECTIONSProduct not conforming to this specification, or to modifications authorized by purchaser, will be subject to rej
39、ection.8. 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 document. An (R) symbol to the left of the document title indicates a complete revision o
40、f 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 Tensile strength to hardness conversions are presented in ASTM A 370.8.3 Hardness conversion tables for metals are presented in ASTM E 14
41、0.8.4 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:AMS6264LProduct form and size or part number of product desiredQuantity of product desired.PREPARED BY AMS COMMITTEE “E“
