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/AMS6299FAEROSPACE MATERIAL SPECIFICATIONAMS6299 REV. FIssued 1964-01Revised 2014-02Supersedin
5、g AMS6299ESteel Bars, Forgings, and Tubing, Carburizing0.50Cr - 1.8Ni - 0.25Mo (0.17 - 0.23C) (SAE 4320H)(Composition similar to UNS H43200)RATIONALEAMS6299F results from a Five Year Review and update of this specification 1. SCOPE1.1 FormThis specification covers an aircraft-quality, low-alloy stee
6、l in the form of bars, forgings, mechanical tubing, and forging stock.1.2 ApplicationThese products have been used typically for parts to be carburized requiring high minimum core hardness with wide range in sections 0.375 inch (9.5 mm) and under in thickness, but usage is not limited to such applic
7、ations. The core may or may not be machinable after hardening.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 document unless
8、 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 PublicationsAvailable from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel:
9、 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 Check Analysis Limits, Wrought Low-Alloy and Carbon SteelsAMS2301 Steel Cleanliness, Aircraft Quality, Magnetic P
10、article Inspection ProcedureSAE INTERNATIONAL AMS6299F Page 2 of 6AMS2370 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 Identification, Bars, Wire, Mecha
11、nical 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-Quality Steel Bars and Mechanical Tubing2.2 ASTM PublicationsAvailable from ASTM International
12、, 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 of Carbon Steel, Low-Alloy Steel,
13、 Silicon Electrical Steel, Ingot Iron, and Wrought IronASTM E 381 Macroetch Testing 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 accordance with ASTM E 350 or by spectrogr
14、aphic or other analytical methods approved by purchaser.TABLE 1 - COMPOSITIONElement min maxCarbon 0.17 0.23Manganese 0.40 0.70Silicon 0.15 0.35Phosphorus - 0.025Sulfur - 0.025Chromium 0.35 0.65Nickel 1.55 2.00Molybdenum 0.20 0.30Copper - 0.353.1.1 Check AnalysisComposition variations shall meet the
15、 applicable requirements of AMS2259.3.2 ConditionThe product shall be supplied in the following condition; hardness and tensile strength shall be determined in accordance with ASTM A 370:SAE INTERNATIONAL AMS6299F Page 3 of 63.2.1 Bars3.2.1.1 Bars 0.500 Inch (12.70 mm) and Under in Nominal Diameter
16、or Least Distance Between Parallel SidesCold finished having tensile strength not higher than 125 ksi (860 MPa) or hardness not higher than 262 HB, or equivalent (See 8.2).3.2.1.2 Bars Over 0.500 Inch (12.70 mm) in Nominal Diameter or Least Distance Between Parallel SidesHot finished and annealed, u
17、nless otherwise ordered, having hardness not higher than 229 HB, or equivalent (See 8.2). Bars ordered cold finished may have hardness as high as 248 HB, or equivalent (See 8.2).3.2.1.3 Bar shall not be cut from plate (Also see 4.4.2).3.2.2 ForgingsAs ordered.3.2.3 Mechanical TubingCold finished, un
18、less otherwise ordered, having hardness not higher than 25 HRC, or equivalent (See 8.2). Tubing ordered hot finished and annealed shall have hardness not higher than 99 HB, or equivalent (See 8.2).3.2.4 Forging StockAs ordered by the forging manufacturer.3.3 PropertiesThe product shall conform to th
19、e 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 hydrochloric acid in accordance with ASTM E 381, shall show no pipe or
20、 cracks. Porosity, segregation, inclusions, and other imperfections shall be no worse than the macrographs of ASTM E 381 shown in Table 2.TABLE 2 - MACROSTRUCTURE LIMITSSquare Inches Square Centimeters MacrographsUp to 36, incl Up to 230, incl S2 - R1 - C2Over 36 to 133, incl Over 230 to 858, incl S
21、2 - 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 engineering organization.3.3.1.1 If tubes are produced directly from ingots or large blooms, transverse sectio
22、ns may be taken from the tubes rather than tube rounds. Macroetch standards for such tubes shall be agreed upon by purchaser and vendor.3.3.2 Average Grain SizeShall be ASTM 5 or finer determined in accordance with ASTM E 112.3.3.3 HardenabilityShall be J1/16 inch (1.5 mm) = HRC 48 maximum and J4/16
23、 (6 mm) = 32 HRC minimum, determined on the standard end-quench test specimen in accordance with ASTM A 255, except that the steel shall be normalized at 1675 F 10 (915 C 6) and the test specimen austenitized at 1500 F 10 (815 C 6).SAE INTERNATIONAL AMS6299F Page 4 of 63.4 QualityThe product, as rec
24、eived by purchaser, shall be uniform in quality and condition, sound, and free from foreign materialsand from internal and external imperfections detrimental to usage of the product.3.4.1 Steel shall be aircraft quality conforming to AMS2301.3.4.2 Bars and tubing ordered hot rolled or cold drawn, or
25、 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 machined, ground, turned, or polished surface.3.4.3 Grain flow of die forgings, except in areas which contain flash-line end g
26、rain, shall follow the general contour of the forgings showing no evidence 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 th
27、e 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 perform any confirmatory testing deemed necessary to ensure that the product conforms to specified requirements.4.2 Classification of Te
28、sts4.2.1 Acceptance TestsComposition (3.1), condition (3.2), macrostructure (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 Tes
29、tsGrain flow of die forgings (3.4.3) 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:4.3.1 Bars, Mechanical Tubing, and Forging StockIn accordance with AMS2370.4.3.2 Forg
30、ingsIn accordance with AMS2372.SAE INTERNATIONAL AMS6299F Page 5 of 64.4 Reports4.4.1 The producer of bars, mechanical tubing and forgings shall furnish with each shipment a report showing producer identity and country where the metal was melted (e. g., final melt in the case of metal processed by m
31、ultiple melting operations) and the results of tests for composition, macrostructure, hardenability and frequency-severity cleanliness rating of each heat and the average grain size of each lot, and stating that the product conforms to the other technical requirements. This report shall include the
32、purchase order number, heat and lot numbers, AMS6299F, product form, size (and/or part number, if applicable) and quantity from each heat. If forgings are supplied, the size and melt source of stock used to make the forgings shall also be included.4.4.2 Report the nominal metallurgically worked cros
33、s sectional size and the cut size, if different (See 3.2.1.3).4.4.3 The producer 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 c
34、omposition, macrostructure, hardenability and frequency-severity rating of each heat. This report shall include the purchase order number, heat number, AMS6299F, size (and/or part number, if applicable) and quantity.4.5 Resampling and RetestingShall be as follows:4.5.1 Bars, Forging Stock, Mechanica
35、l TubingIn accordance with AMS2370.4.5.2 ForgingsIn accordance with AMS2372.5. 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 (2 to 6 m), but not more than 10% of any sh
36、ipment shall be supplied in lengths shorter than 10 feet (3 m).5.2 IdentificationShall be as follows:5.2.1 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 mechanic
37、al tubing ordered cold drawn, cold rolled, ground, turned, or polished shall be protected from corrosion prior to shipment.SAE INTERNATIONAL AMS6299F Page 6 of 65.4 PackagingThe product shall be prepared for shipment in accordance with commercial practice and in compliance with applicable rules and
38、regulations pertaining to the handling, packaging, and transportation of the product to ensure carrier acceptance and safe delivery.6. ACKNOWLEDGMENTA vendor shall include this specification number and its revision letter in all quotations and when acknowledging purchase orders.7. REJECTIONMaterial
39、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 areas where technical revisions, not editorial changes, have been made to the previou
40、s issue of this 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 m
41、etals are presented in ASTM E 140.8.3 Terms used in AMS are clarified in ARP1917. 8.4 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.8.5 Purchase documents should specify not less than the following:AMS6299FProduct form and size (and/or part number, if applicable) of product desiredQuantity of product desired.PREPARED BY AMS COMMITTEE “E”
