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 2015 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/AMS5638GAEROSPACEMATERIAL SPECIFICATIONAMS5638 REV. GIssued 1963-01Revised 2010-11Reaffirmed
5、2015-12Superseding AMS5638FSteel, Corrosion-Resistant, Bars and Forgings0.14S - 18Cr - 9.5Ni - 0.50Mo - 0.80Al (303MA)Free-Machining; Swaging or UpsettingSolution Heat Treated(Composition similar to UNS S30345)RATIONALE AMS5638G has been reaffirmed to comply with the SAE five-year review policy.1. S
6、COPE 1.1 Form This specification covers a free-machining, corrosion-resistant steel in the form of bars, forgings, and forging stock. 1.2 Application These products have been used typically for parts on which the amount of machining warrants use of a free-machining grade of steel, requiring corrosio
7、n resistance similar to the 18-8 type of steel, not subjected to temperatures exceeding 700 F (371 C) during fabrication or in service, but usage is not limited to such applications. 2. APPLICABLE DOCUMENTS The issue of the following documents in effect on the date of the purchase order forms a part
8、 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 issue of that document
9、 shall apply. 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. AMS2241 Tolerances, Corrosion and Heat-Resistant Steel, Iron Alloy, Titanium, and Titanium All
10、oy Bars and Wire AMS2248 Chemical Check Analysis Limits, Corrosion and Heat-Resistant Steels and Alloys, Maraging and Other Highly-Alloyed Steels, and Iron Alloys AMS2371 Quality Assurance Sampling and Testing, Corrosion and Heat-Resistant Steels and Alloys, Wrought Products and Forging Stock AMS237
11、4 Quality Assurance Sampling and Testing, Corrosion and Heat-Resistant Steel and Alloy Forgings AMS2806 Identification, Bars, Wire, Mechanical Tubing, and Extrusions, Carbon and Alloy Steels and Corrosion and Heat-Resistant Steels and Alloys AMS2808 Identification, Forgings 2.2 ASTM Publications Ava
12、ilable from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM E 10 Brinell Hardness of Metallic Materials ASTM E 353 Chemical Analysis of Stainless, Heat-Resisting, Maraging, and Other Similar Chromium-Nickel-Iron Alloys
13、 3. TECHNICAL REQUIREMENTS 3.1 Composition Shall 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. TABLE 1 - COMPOSITION Element min max Carbon -
14、 0.15 Manganese - 2.00Silicon - 1.00 Phosphorus - 0.040 Sulfur 0.11 0.16 Chromium 17.00 19.00Nickel 8.50 10.50Molybdenum 0.40 0.60 Aluminum 0.60 1.00Copper 0.50SAE INTERNATIONAL AMS5638G Page 2 of 6_ 3.1.1 Check Analysis Composition variations shall meet the applicable requirements of AMS2248. 3.2 C
15、ondition The product shall be supplied in the following condition: 3.2.1 Bars and Forgings Solution heat treated, free from continuous carbide network, and descaled. 3.2.1.1 All hexagons and other bars 2.75 inches (69.8 mm) and under in nominal diameter or least distance between parallel sides shall
16、 be cold finished. 3.2.1.2 Bars, other than hexagons, over 2.75 inches (69.8 mm) in nominal diameter or least distance between parallel sides shall be hot finished. 3.2.2 Forging Stock As ordered by the forging manufacturer. 3.3 Heat Treatment Bars and forgings shall be solution heat treated by heat
17、ing to a temperature not lower than 1900 F (1038 C), holding at the selected temperature within 25 F (14 C) for a time commensurate with cross-sectional thickness, and cooling rapidly. 3.3.1 Bars may be heat treated immediately following hot working, while the metal temperature is sufficiently high
18、that all grain boundry carbides are in solid solution, and cooling rapidly to prevent grain boundry carbide precipitation. 3.4 Properties The product shall conform to the following requirements: 3.4.1 Hardness Shall be as follows, determined in accordance with ASTM E 10: 3.4.1.1 Bars Shall be as sho
19、wn in Table 2, or equivalent (See 8.2), determined at approximate mid-radius or quarter thickness. TABLE 2 - HARDNESS Nominal Diameter or Least Distance Between Parallel Sides Inch Nominal Diameter or Least Distance Between Parallel Sides Millimeters Hardness, HBUp to 0.75, incl Up to 19.0, incl 170
20、 to 255 Over 0.75 incl Over 19.0 incl 140 to 241 SAE INTERNATIONAL AMS5638G Page 3 of 6_ 3.4.1.2 Forgings Shall have hardness not higher than 187 HB, or equivalent (See 8.2). 3.5 Quality The product, as received by purchaser, shall be uniform in quality and condition, sound, and, consistent with the
21、 type of steel involved, free from foreign materials and from imperfections detrimental to usage of the product. 3.5.1 Grain flow of die forgings, except in areas which contain flash-line end grain, shall follow the general contour of the forgings showing no evidence of reentrant grain flow. 3.6 Tol
22、erances Shall conform to all applicable requirements of AMS2241. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection 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
23、sample and to perform any confirmatory testing deemed necessary to ensure that the product conforms to specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests The following requirements are acceptance tests and shall be performed on each heat or lot as applicable: 4.2.1.1 Composit
24、ion (3.1) of each heat. 4.2.1.2 Hardness (3.4.1) of each lot of bars and forgings. 4.2.1.3 Tolerances (3.6) of bars. 4.2.2 Periodic Tests Grain flow of die forgings (3.5.1) is a periodic test and shall be performed at a frequency selected by the vendor unless frequency of testing is specified by pur
25、chaser. 4.3 Sampling and Testing Shall be as follows: 4.3.1 Bars and Forging Stock In accordance with AMS2371. 4.3.2 Forgings In accordance with AMS2374. SAE INTERNATIONAL AMS5638G Page 4 of 6_ 4.4 Reports The vendor of the product shall furnish with each shipment a report showing the results of tes
26、ts for composition of each heat and hardness for 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, AMS5638G, size, and quantity. If forgings are supplied, the size and melt source of stock u
27、sed to make the forgings shall also be included. 4.5 Resampling and Retesting Shall be as follows: 4.5.1 Bars and Forging Stock In accordance with AMS2371. 4.5.2 Forgings In accordance with AMS2374. 5. PREPARATION FOR DELIVERY 5.1 Sizes Except when exact lengths or multiples of exact lengths are ord
28、ered, straight bars 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 Identification Shall be as follows: 5.2.1 Bars In accordance with AMS2806. 5.2.2 Forgings In accordance with AMS280
29、8. 5.2.3 Forging Stock As agreed upon by purchaser and vendor. 5.3 Packaging The 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 ca
30、rrier acceptance and safe delivery. 6. ACKNOWLEDGMENT A vendor shall mention this specification number and its revision letter in all quotations and when acknowledging purchase orders. SAE INTERNATIONAL AMS5638G Page 5 of 6_ 7. REJECTIONS Product not conforming to this specification, or to modificat
31、ions authorized by purchaser, will be subject to rejection. 8. NOTES 8.1 A change bar (l) 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
32、 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 metals are presented in ASTM E 140. 8.3 Terms used
33、in AMS are clarified in ARP1917. 8.4 Dimensions in inch/pound units and the Fahrenheit temperatures are primary; dimensions 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: AMS5638G Form and size or part number of product desired Quantity of product desired. PREPARED BY AMS COMMITTEE “F” SAE INTERNATIONAL AMS5638G Page 6 of 6_
