1、AEROSPACE MATERIAL SPECIFICATION AMS6382 REV. P Issued 1939-12 Reaffirmed 2006-02 Revised 2014-08 Superseding AMS6382N Steel, Bars, Forgings, and Rings 0.95Cr - 0.20Mo (0.38 - 0.43C) (SAE 4140) Annealed (Composition similar to UNS G41400) RATIONALE AMS6382P results from a Five Year Review and update
2、 of this specification that revises macrostructure, decarburization, and reporting requirements. 1. SCOPE 1.1 Form This specification covers an aircraft-quality, low-alloy steel in the form of bars, forgings, flash welded rings, and stock for forging or flash welded rings. 1.2 Application These prod
3、ucts have been used typically for parts 0.50 inch (12.7 mm) and under in nominal section thickness at time of heat treatment, requiring a through-hardened steel capable of developing hardness as high as 50 HRC when appropriately heat treated and for parts of greater thickness but requiring proportio
4、nately lower hardness, but usage is not limited to such applications. 1.2.1 Certain design and processing procedures may cause these products to become susceptible to stress-corrosion cracking after heat treatment; ARP1110 recommends practices to minimize such conditions. 2. APPLICABLE DOCUMENTS The
5、 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 a specific document issue is specified. When the referenced document has been cancelled
6、 and no superseding document has been specified, the last published issue of that document shall apply. _ 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 i
7、ts applicability and suitability for any particular 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 w
8、ritten comments and suggestions. Copyright 2014 SAE International All 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 per
9、mission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-4970 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.o
10、rg/technical/standards/AMS6382P SAE INTERNATIONAL AMS6382P Page 2 of 8 2.1 SAE Publications Available 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 B
11、ars AMS2259 Chemical Check Analysis Limits, Wrought Low-Alloy and Carbon Steels AMS2301 Steel Cleanliness, Aircraft Quality, Magnetic Particle Inspection Procedure AMS2370 Quality Assurance Sampling and Testing, Carbon and Low-Alloy Steel Wrought Products and Forging Stock AMS2372 Quality Assurance
12、Sampling and Testing, Carbon and Low-Alloy Steel Forgings AMS2806 Identification, Bars, Wire, Mechanical Tubing, and Extrusions, Carbon and Alloy Steels and Corrosion and Heat-Resistant Steels and Alloys AMS2808 Identification, Forgings AMS7496 Rings, Flash Welded, Carbon and Low-Alloy Steels AS1182
13、 Standard Stock Removal Allowance, Aircraft-Quality and Premium Aircraft-Quality Steel Bars and Mechanical Tubing ARP1110 Minimizing Stress Corrosion Cracking in Wrought Forms of Steels and Corrosion Resistant Steels and Alloys 2.2 ASTM Publications Available from ASTM International, 100 Barr Harbor
14、 Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM A 255 Determining the Hardenability of Steel ASTM A 370 Mechanical Testing of Steel Products ASTM E 112 Determining Average Grain Size ASTM E 350 Chemical Analysis of Carbon Steel, Low-Alloy Steel, Silicon
15、 Electrical Steel, Ingot Iron, and Wrought Iron ASTM E 381 Macroetch Testing Steel Bars, Billets, Blooms, and Forgings ASTM E 384 Knoop and Vickers Hardness of Materials 3. TECHNICAL REQUIREMENTS 3.1 Composition Shall conform to the percentages by weight shown in Table 1, determined by wet chemical
16、methods in accordance with ASTM E 350, by spectrochemical methods, or by other analytical methods acceptable to purchaser. SAE INTERNATIONAL AMS6382P Page 3 of 8 TABLE 1 - COMPOSITION Element min max Carbon 0.38 0.43 Manganese 0.75 1.00 Silicon 0.15 0.35 Phosphorus - 0.025 Sulfur - 0.025 Chromium 0.
17、80 1.10 Molybdenum 0.15 0.25 Nickel - 0.25 Copper - 0.35 3.1.1 Check Analysis Composition variations shall meet the applicable requirements of AMS2259. 3.2 Condition The product shall be supplied in the following condition; hardness and tensile strength shall be determined in accordance with ASTM A
18、370: 3.2.1 Bars 3.2.1.1 Bars 0.500 Inch (12.70 mm) and Under in Nominal Diameter or Least Distance Between Parallel Sides Annealed and cold 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
19、 or Least Distance Between Parallel Sides Hot finished and annealed, unless otherwise ordered, having hardness not higher than 229 HB, or equivalent (See 8.3). Product ordered annealed and cold finished shall have hardness not higher than 241 HB, or equivalent (See 8.3). 3.2.1.3 Bar shall not be cut
20、 from plate (Also see 4.4.2). 3.2.2 Forgings and Flash Welded Rings As ordered. 3.2.2.1 Flash welded rings shall not be supplied unless specified or permitted on purchasers part drawing. When supplied, rings shall be manufactured in accordance with AMS7496. 3.2.3 Stock for Forging or Flash Welded Ri
21、ngs As ordered by the forging or flash welded ring manufacturer. 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, billets, an
22、d 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, and other imperfections shall be no worse than the macrographs of ASTM E 381 shown in Table 2. SAE INTERNATIONAL AMS6382P Page 4
23、of 8 TABLE 2 - MACROSTRUCTURE LIMITS Cross-Sectional Area Square Inches Cross-Sectional Area Square Centimeters Macrographs Up to 36, incl Up to 232, incl S2 - R1 - C2 Over 36 to 133, incl Over 232 to 858, incl S2 - R2 - C3 Over 133 Over 858 Note 1 Note 1 Limits for larger sizes shall be agreed upon
24、 by producer and purchaser. 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 Rings Shall be ASTM No. 5 or finer determined in accordance with ASTM E 112. 3.3.3 Hardenability of Each Hea
25、t Shall be J6/16 inch (9.5 mm) = 50 HRC minimum and J9/16 inch (14.3 mm) = 44 HRC minimum, determined on the standard end-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 1550 F 10 (843 C 6). 3.
26、3.4 Decarburization 3.3.4.1 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 to specified microstructural requireme
27、nts 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 UNITS Nominal Diameter or Distanc
28、e Between Parallel Sides Inches Total Depth of Decarburization Inch Up to 0.375, incl 0.010 Over 0.375 to 0.500, incl 0.012 Over 0.500 to 0.625, incl 0.014 Over 0.625 to 1.000, incl 0.017 Over 1.000 to 1.500, incl 0.020 Over 1.500 to 2.000, incl 0.025 Over 2.000 to 2.500, incl 0.030 Over 2.500 to 3.
29、000, incl 0.035 Over 3.000 to 4.000, incl 0.045 SAE INTERNATIONAL AMS6382P Page 5 of 8 TABLE 3B - MAXIMUM TOTAL DEPTH OF DECARBURIZATION LIMITS, SI UNITS Nominal Diameter or Distance Between Parallel Sides Millimeters Total Depth of Decarburization Millimeters Up to 9.52, incl 0.25 Over 9.52 to 12.7
30、0, incl 0.30 Over 12.70 to 15.88, incl 0.36 Over 15.88 to 25.40, incl 0.43 Over 25.40 to 38.10, incl 0.51 Over 38.10 to 50.80, incl 0.64 Over 50.80 to 63.50, incl 0.76 Over 63.50 to 76.20, incl 0.89 Over 76.20 to 101.60, incl 1.14 3.3.4.4 Decarburization shall be measured by the metallographic metho
31、d or by the traverse method using microhardness 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 microh
32、ardness method, is defined as the perpendicular 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 any decarburization on the adjacent surface. In case of
33、 dispute, the depth of decarburization determined 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 limits of 3.3.4.3 by more than 0.
34、005 inch (0.13 mm) and the width is 0.065 inch (1.65 mm) or less. 3.4 Quality The 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. 3.4.1 Steel shall be aircraft quality con
35、forming to AMS2301. 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 f
36、low of die forgings, except in areas that contain flash-line end grain, shall follow the general contour of the forgings showing no evidence of reentrant grain flow. 3.5 Tolerances Bars shall conform to all applicable requirements of AMS2251. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for In
37、spection The 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 that the product conforms to specified requireme
38、nts. SAE INTERNATIONAL AMS6382P Page 6 of 8 4.2 Classification of Tests 4.2.1 Acceptance Tests Composition (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 (3.4.1) and tolerances (3.5) are accept
39、ance tests and shall be performed on each heat or lot as applicable. 4.2.2 Periodic Tests Grain 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 Testing 4.3.1 Bars, Fla
40、sh Welded Rings, and Stock for Forging or Flash Welded Rings In accordance with AMS2370. 4.3.2 Forgings In accordance with AMS2372. 4.4 Reports 4.4.1 The producer of bar, forgings, and rings shall furnish with each shipment a report showing the producer identity, country where the metal was melted (
41、e. g., final melt in the case of metal processed by multiple melting operations), and the results of composition, macrostructure, hardenability, and frequency-severity cleanliness rating for each heat and for average grain size of each lot, and stating that the product conforms to the other technica
42、l requirements. This report shall include the purchase order number, heat and lot numbers, AMS6382P, product form and size or part number, and quantity. 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 metallurgica
43、lly worked cross sectional size and the cut size, if different (Also see 3.2.1.3). 4.4.3 The vendor stock for forging and flash welded rings shall furnish with each shipment a report showing the producer identity, country where the metal was melted (e. g., final melt in the case of metal processed b
44、y multiple melting operations), and the results of tests for composition, macrostructure, hardenability, and frequency-severity cleanliness rating of each heat. This report shall include the purchase order number, heat number, AMS6382P, size and quantity. 4.5 Resampling and Retesting 4.5.1 Bars, Fla
45、sh Welded Rings, and Stock for Forging or Flash Welded Rings In accordance with AMS2370. 4.5.2 Forgings In accordance with AMS2372. 5. PREPARATION FOR DELIVERY 5.1 Sizes Except when exact lengths or multiples of exact lengths are ordered, straight bars will be acceptable in mill lengths of 6 to 20 f
46、eet (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). SAE INTERNATIONAL AMS6382P Page 7 of 8 5.2 Identification 5.2.1 Bars In accordance with AMS2806. 5.2.2 Forgings In accordance with AMS2808. 5.2.3 Flash Welded Rings and Stock for Forgin
47、g or Flash Welded Rings As agreed upon by purchaser and vendor. 5.3 Protective Treatment Bars and flash welded rings ordered cold-drawn, cold-rolled, ground, turned, or polished shall be protected from corrosion prior to shipment. 5.4 Packaging The product shall be prepared for shipment in accordanc
48、e 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. ACKNOWLEDGMENT A vendor shall include this specification number and its revision letter in al
49、l quotations and when acknowledging purchase orders. 7. REJECTIONS Product not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection. 8. NOTES 8.1 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) symb
