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 2014 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/AMS6322PAEROSPACE MATERIAL SPECIFICATIONAMS6322 REV. PIssued 1942-09Reaffirmed 2009-06Revised
5、 2014-06Superseding AMS6322NSteel Bars, Forgings, and Rings0.50Cr - 0.55Ni - 0.25Mo (0.38 - 0.43C) (SAE 8740)(Composition similar to UNS G87400)RATIONALEAMS6322P results from a Five Year Review and update of this specification.1. SCOPE1.1 FormThis specification covers an aircraft-quality, low-alloy
6、steel in the form of bars, forgings, flash welded rings, and stock for forging or flash welded rings.1.2 ApplicationThese products have been used typically for parts, with section thickness of 0.375 inch (9.50 mm) and under at the time of heat treatment, requiring a through-hardening steel capable o
7、f developing hardness as high as 50 HRC when properlyhardened and tempered and also parts of greater thickness but requiring proportionately lower hardness, but usage is not limited to such applications. 2. APPLICABLE DOCUMENTSThe issue of the following documents in effect on the date of the purchas
8、e order forms a part 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 cancelled and no superseding document has been specified, the last published is
9、sue of that document shall apply.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 BarsAMS2259 Chemical Check Analysis Limit
10、s, Wrought Low-Alloy and Carbon SteelsAMS2301 Steel Cleanliness, Aircraft Quality Magnetic Particle Inspection ProcedureSAE INTERNATIONAL AMS6322P Page 2 of 7AMS2370 Quality Assurance Sampling and Testing, Carbon and Low-Alloy Steel, Wrought Products and Forging StockAMS2372 Quality Assurance Sampli
11、ng and Testing, Carbon and Low-Alloy Steel ForgingsAMS2806 Identification, Bars, Wire, Mechanical Tubing, and Extrusions, Carbon and Alloy Steels and Corrosion and Heat-Resistant Steels and AlloysAMS2808 Identification, ForgingsAMS7496 Rings, Flash Welded, Carbon and Low-Alloy SteelsAS1182 Standard
12、Stock Removal Allowance, Aircraft Quality and Premium Quality Steel Bars and Mechanical Tubing2.2 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 A 255 End-Quench Test for Hardenability o
13、f SteelASTM A 370 Mechanical Testing of Steel ProductsASTM E 112 Determining Average Grain SizeASTM E 350 Chemical Analysis of Carbon Steel, Low-Alloy Steel, Silicon Electrical Steel, Ingot Iron, and Wrought IronASTM E 381 Macroetch Testing, Inspection, and Rating Steel Products Comprising Bars, Bil
14、lets, Blooms, and ForgingsASTM E 384 Knoop and Vickers Hardness of Materials3. 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 spectrographic or other analytical methods approved
15、by purchaser.TABLE 1 - COMPOSITIONElement min maxCarbon 0.38 0.43Manganese 0.75 1.00Silicon 0.15 0.35Phosphorus - 0.025Sulfur - 0.025Chromium 0.40 0.60Nickel 0.40 0.70Molybdenum 0.20 0.30Copper - 0.353.1.1 Check AnalysisComposition variations shall meet the applicable requirements of AMS2259.SAE INT
16、ERNATIONAL AMS6322P Page 3 of 73.2 ConditionThe product shall be supplied in the following condition; hardness and tensile strength shall be determined in accordance with ASTM A 370:3.2.1 Bars3.2.1.1 Bars 0.500 Inch (12.70 mm) and Under in Nominal Diameter or Least Distance Between Parallel SidesCol
17、d finished having tensile strength not higher than 120.0 ksi (825 MPa) or equivalent hardness (See 8.2).3.2.1.2 Bars Over 0.500 Inch (12.750 mm) in Nominal Diameter or Least Distance Between Parallel SidesHot finished and annealed, unless otherwise ordered, having hardness not higher than 229 HB, or
18、 equivalent (See 8.3). Bars ordered cold finished may have hardness as high as 241 HB, or equivalent (See 8.3).3.2.1.3 Bar shall not be cut from plate (Also see 4.4.2).3.2.2 Forgings and Flash Welded RingsAs ordered.3.2.2.1 Flash welded rings shall not be supplied unless specified or permitted on pu
19、rchasers part drawing. When supplied, they shall be manufactured in accordance with AMS7496.3.2.3 Stock for Forging or Flash Welded RingsAs ordered by the forging or flash welded ring manufacturer.3.3 PropertiesThe product shall conform to the following requirements; hardness testing shall be perfor
20、med in accordance with ASTM A 370:3.3.1 MacrostructureVisual examination of transverse full cross-sections from bars, billets, and stock for forging or flash welded rings, etched in hot hydrochloric acid in accordance with ASTM E 381, shall show no pipe or cracks. Porosity, segregation, inclusions,
21、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 S2 - R2 - C3Over 133 Over 858 Note 1Note 1: L
22、imits 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. 3.3.2 Average Grain Size of Bars, Forgings and Flash Welded RingsShall be ASTM 5 or finer determined in accordance with ASTM E
23、112. 3.3.3 HardenabilityShall be J5/16 (7.5 mm) = HRC 49 min and J8/16 (12 mm) = HRC 40 min, determined on the standard end-quench test specimen in accordance with ASTM A 255, except that the steel shall be normalized at 1600 F 10 (870 C 6) and the test specimen austenitized at 1550 F 10 (845 C 6).S
24、AE INTERNATIONAL AMS6322P Page 4 of 73.3.4 Decarburization3.3.4.1 Bars and flash welded rings ordered ground, turned, or polished shall be free from decarburization on the ground, turned, or polished surfaces.3.3.4.2 Allowable decarburization of bars and billets ordered for redrawing or forging or t
25、o specified microstructural requirements shall be as agreed upon by purchaser and vendor.3.3.4.3 Decarburization of bars and flash welded rings to which 3.3.4.1 or 3.3.4.2 is not applicable shall be not greater than shown in Table 3.TABLE 3A MAXIMUM TOTAL DEPTH OF DECARBURIZATION LIMITS, INCH/POUND
26、UNITSNominal Diameter or DistanceBetween Parallel SidesInchesTotal Depth of DecarburizationInchUp to 0.375, incl 0.010Over 0.375 to 0.500, incl 0.012Over 0.500 to 0.625, incl 0.014Over 0.625 to 1.000, incl 0.017Over 1.000 to 1.500, incl 0.020Over 1.500 to 2.000, incl 0.025Over 2.000 to 2.500, incl 0
27、.030Over 2.500 to 3.000, incl 0.035Over 3.000 to 4.000, incl 0.045TABLE 3B - MAXIMUM TOTAL DEPTH OF DECARBURIZATION LIMITS, SI UNITSNominal Diameter or DistanceBetween Parallel SidesMillimetersTotal Depth of DecarburizationMillimetersUp to 9.50, incl 0.25Over 9.50 to 12.50, incl 0.30Over 12.50 to 15
28、.50, incl 0.35Over 15.50 to 25.00, incl 0.42Over 25.00 to 37.50, incl 0.50Over 37.50 to 50.00, incl 0.62Over 50.00 to 62.50, incl 0.75Over 62.50 to 75.00, incl 0.88Over 75.00 to 100.00, incl 1.123.3.4.4 Decarburization shall be measured by the microscopic method or by the traverse method using micro
29、hardness testing in accordance with ASTM E 384. The microhardness method shall be conducted on a hardened but untempered specimen protected during heat treatment to prevent changes in surface carbon content. Depth of decarburization, when measured by the microhardness method, is defined as the perpe
30、ndicular distance from the surface to the depth under that surface where there is no further increase in hardness. Such measurements shall be far enough away from any adjacent surface to be uninfluenced by decarburization on the adjacent surface. In case of dispute, the depth of decarburization dete
31、rmined using the microhardness traverse method shall govern.3.3.4.4.1 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 (0.12 mm) and the width is 0.065 inch (1
32、.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 imperfections detrimental to usage of the product.SAE INTERNATIONAL AMS6322P Page 5 of 73.4.1 Steel shall be aircraft quality conforming to AMS
33、2301.3.4.2 Bars 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 machined, ground, turned, or polished surface.3.4.3 Grain flow of die forg
34、ings, except in areas which contain flash-line end grain, shall follow the general contour of the forgings, showing no evidence of reentrant grain flow.3.5 TolerancesBars shall conform to all applicable requirements of AMS2251.4. QUALITY ASSURANCE PROVISIONS4.1 Responsibility for InspectionThe vendo
35、r 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 perform any confirmatory testing deemed necessary to ensure that the product conforms to specified requirements.4.2 Classificatio
36、n of Tests4.2.1 Acceptance TestsComposition (3.1), condition (3.2), macrostructure (3.3.1), average grain size (3.3.2), hardenability (3.3.3), decarburization (3.3.4), frequency-severity cleanliness rating (3.4.1) and tolerances (3.5) are acceptance tests and shall be performed on each heat or lot a
37、s applicable.4.2.2 Periodic TestsGrain 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, Flash Welded Rings, and Stock for Flash We
38、lded Rings and Forging StockIn accordance with AMS2370.4.3.2 ForgingsIn accordance with AMS2372.SAE INTERNATIONAL AMS6322P Page 6 of 74.4 Reports4.4.1 The producer of bars, flash welded rings and forgings shall furnish with each shipment a report showing the producer identity and country where the m
39、etal was melted (i. e., final melt in the case of metal processed by multiple melting operations), the results of tests for composition, macrostructure, hardenability and frequency-severity cleanliness rating of each heat and for tensile strength or hardness (as applicable) and the average grain siz
40、e of each lot, and stating that the product conforms to all other technical requirements. This report shall include the purchase order number, heat and lot numbers, AMS6322P, product form, size and quantity. If forgings are supplied, the size and melt source of stock used to make the forgings shall
41、also be included.4.4.2 Report the nominal metallurgically worked cross sectional size and the cut size, if different (See 3.2.1.3).4.4.3 The producer of stock for forging and flash welded rings shall furnish with each shipment a report showing the producer identity and country where the metal was me
42、lted (e. g., final melt in the case of metal processed by multiple melting operations) and the composition, macrostructure, hardenability and frequency-severity rating of each heat. This report shall include the purchase order number, heat number, AMS6322P, size and quantity.4.5 Resampling and Retes
43、tingShall be as follows:4.5.1 Bars, Flash Welded Rings, Forging Stock, and Stock for Flash Welded RingsIn 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 will be ac
44、ceptable in mill lengths of 6 to20 feet (2 to 6 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 follows:5.2.1 BarsIn accordance with AMS2806.5.2.2 ForgingsIn accordance with AMS2808.5.2.3 Flash Welded Rings and Stock for
45、 Forging or Flash Welded RingsAs agreed upon by purchaser and vendor.5.3 Protective Treatment5.3.1 Bars and flash welded rings ordered cold drawn, cold rolled, ground, turned, or polished shall be protected from corrosion prior to shipment.SAE INTERNATIONAL AMS6322P Page 7 of 75.4 PackagingThe produ
46、ct 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 acceptance and safe delivery.6. ACKNOWLEDGMENTA vendor shall include this specif
47、ication number and its revision letter in all quotations and when acknowledging purchase orders.7. REJECTIONMaterial 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 conv
48、enience of the user in locating areas where technicalrevisions, 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 revisions. Change bars and (R) are not used
49、 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 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 temperatur
