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/AMS6437JAEROSPACEMATERIAL SPECIFICATIONAMS6437 REV. JIssued 1959-11Revised 2015-12Superseding
5、 AMS6437HSteel, Sheet, Strip, and Plate5.0Cr - 1.3Mo - 0.50V (0.38 - 0.43C) (H-11)(Composition similar to UNS T20811)RATIONALEAMS6437J results from a Five Year Review and update of this specification that revises decarburization testing andreporting.1. SCOPE1.1 Form AMS6437J results from a Five Year
6、 Review and update of this specification that revises decarburization testing and reporting.1.2 Application These products have been used typically for parts requiring relatively high levels of strength, fatigue resistance, toughness,ductility, and thermal stability for service up to 1000 F (538 C),
7、 and where such parts may require welding during fabrication, but usage is not limited to such applications.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
8、 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 apply.2.1 SAE Publications Available from SAE International, 400 Comm
9、onwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org.AMS2252 Tolerances, Low-Alloy Steel Sheet, Strip, and PlateAMS2259 Chemical Check Analysis Limits, Wrought Low-Alloy and Carbon SteelsAMS2301 Steel Cleanliness, Aircraft
10、 Quality Magnetic Particle Inspection ProcedureSAE INTERNATIONAL AMS6437J Page 2 of 6AMS2370 Quality Assurance Sampling and Testing, Carbon and Low-Alloy Steel Wrought Products and Forging StockAMS2807 Identification, Carbon and Low-Alloy Steels, Corrosion and Heat-Resistant Steels and Alloys, Sheet
11、, Strip, Plate, and Aircraft Tubing2.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org.ASTM A370 Mechanical Testing of Steel ProductsASTM E112 Determining Average Grain SizeASTM E290 Bend Tes
12、ting of Material for DuctilityASTM E350 Chemical Analysis of Carbon Steel, Low-Alloy Steel, Silicon Electrical Steel, Ingot Iron, and Wrought IronASTM E384 Knoop and Vickers Hardness of Materials3. TECHNICAL REQUIREMENTS 3.1 Composition Shall conform to the percentages by weight shown in Table 1, de
13、termined by wet chemical methods in accordance with ASTM E350, by spectrochemical methods, or by other analytical methods acceptable to purchaser.Table 1 - CompositionElement min maxCarbonManganeseSiliconPhosphorusSulfurChromiumMolybdenumVanadiumNickelCopper0.380.200.80-4.751.200.40-0.430.401.000.02
14、00.0205.251.400.600.250.353.1.1 Check Analysis Composition variations shall meet the applicable requirements of AMS2259.3.2 Condition The product shall be supplied in the following condition; tensile tests and hardness tests shall be conducted in accordance with ASTM A370:3.2.1 Sheet and Strip Cold
15、finished and bright annealed, or hot rolled, annealed if necessary, and descaled, having tensile strength not higher than 125 ksi (862 MPa), or equivalent hardness (see 8.2).3.2.2 Plate Hot rolled, annealed if necessary, and descaled, having tensile strength not higher than 125 ksi (862 MPa), or equ
16、ivalenthardness (see 8.2).SAE INTERNATIONAL AMS6437J Page 3 of 63.3 Properties The product shall conform to the following requirements; hardness and tensile testing shall be performed in accordance with ASTM A370:3.3.1 Decarburization Decarburization shall be evaluated by one of the methods of 3.3.1
17、.1 or 3.3.1.2.3.3.1.1 Metallographic MethodA cross section taken perpendicular to the surface shall be prepared, etched, and examined metallographically at a magnification not to exceed 100X. The product shall not show a layer of complete (ferrite) or partial decarburization exceeding the limits of
18、Table 2.3.3.1.2 Hardness Traverse MethodThe total depth of decarburization shall be determined by a traverse method using microhardness testing in accordance with ASTM E384, at a magnification not exceeding 100X, conducted on a hardened but untempered specimen protected during heat treatment to prev
19、ent changes in surface carbon content. Tempering is generally not recommended, but if tempered, the tempering temperature shall be not higher than 300 F (149 C). Depth of decarburization is defined as the perpendicular distance from the surface to the depth under that surface where there is not furt
20、her increase in hardness. Such measurements shall be far enough away from any adjacent surface to be uninfluenced by any decarburization on the adjacent surface. Acceptance shall be as listed in Table 2.Table 2A - Maximum total depth of decarburization, inch/pound unitsNominal ThicknessInchesTotal D
21、epth ofDecarburizationInch0.375 to 0.500, incl 0.015Over 0.500 to 1.000, incl 0.025Over 1.000 to 2.000, incl 0.035Table 2B - Maximum total depth of decarburization, SI unitsNominal ThicknessMillimetersTotal Depth ofDecarburizationMillimeter9.52 to 12.70, incl 0.38Over 12.70 to 25.40, incl 0.64Over 2
22、5.40 to 50.80, incl 0.893.3.1.3 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 (0.13 mm) and the width is 0.065 inch (1.65 mm) or less.3.3.1.4 In the case of
23、 dispute, the total depth of decarburization determined using the microhardness traverse method shall govern.3.3.2 BendingProduct 0.437 inch (11.10 mm) and under in nominal thickness shall be tested in accordance with ASTM E290 using a sample prepared nominally 0.75 inch (19.0 mm) in width with its
24、axis of bending parallel to the direction of rolling and shall withstand without cracking when bending at room temperature through the angle and bend radius shown in Table 3. In case of dispute, the results of tests using the guided bend test of ASTM E290 shall govern.SAE INTERNATIONAL AMS6437J Page
25、 4 of 6Table 3 - Bend requirementsNominal Thickness InchNominal Thickness MillimetersBend Angle DegreesBend Radiust = nominal thicknessUp to 0.249, incl Up to 6.32, incl 180 1.5 tOver 0.249 to 0.437, incl Over 6.32 to 11.10, incl 90 1.5 t3.3.3 Response to Heat Treatment Tensile specimens shall meet
26、the following requirements after being austenitized by heating to 1850 F 25 F(1010 C 14 C), holding at heat for 15 to 25 minutes, and cooling at a rate equivalent to air cooling to room temperature, and tempered three times by heating to a temperature not lower than 1000 F (538 C), holding at heat f
27、or 2 to 3 hours, and cooling in air.3.3.3.1 Tensile Properties Shall be as shown in Table 4.Table 4 - Minimum tensile propertiesProperty ValueTensile StrengthYield Strength at 0.2% OffsetElongation in 2 inches (50.8 mm) or 4D260 ksi (1793 MPa)220 ksi (1517 MPa)5%3.3.3.2 Hardness Shall be 50 to 56 HR
28、C, or equivalent (see 8.3).3.3.3.3 Average Grain Size Shall be ASTM No. 7 or finer, determined in accordance with ASTM E112. For grain size samples only, it is permissible to omit the temper cycle of 3.3.3 to assist in delineating the grain boundaries.3.4 Quality The product, as received by purchase
29、r, 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 conforming to AMS2301.3.5 Tolerances Shall conform to all applicable requirements of AMS2252.4. QUALITY ASSURANCE PROV
30、ISIONS 4.1 Responsibility for Inspection The producer of the product shall supply all samples for producers 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 pro
31、duct conforms to specified requirements.4.2 Classification of Tests All technical requirements are acceptance tests and shall be performed on each heat or lot as applicable.SAE INTERNATIONAL AMS6437J Page 5 of 64.3 Sampling and Testing Shall be in accordance with AMS2370.4.4 Reports The producer of
32、the product 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 by multiple melting operations), the results of tests for composition and frequency-severity cleanliness rating of each heat, and f
33、or condition, and bending of each lot, and for tensile properties, hardness and average grain size of each lot after heat treatment, and stating that the product conforms to the other technical requirements. This report shall include the purchase order number, heat and lot numbers, AMS6437J,product
34、form, size, and quantity.4.5 Resampling and Retesting Shall be in accordance with AMS2370.5. PREPARATION FOR DELIVERY 5.1 Identification Shall be in accordance with AMS2807.5.2 Protective Treatment The product shall be protected from corrosion prior to shipment.5.3 Packaging The product shall be pre
35、pared 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. ACKNOWLEDGMENT A producer shall include this specification numb
36、er and its revision letter in all 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 Revision IndicatorA change bar (l) located in the left margin is for
37、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 of the document, including technical revisions. Change bars and (R) are
38、 not used in original publications, nor in documents that contain editorial changes only.8.2 Tensile strength to hardness conversions are presented in ASTM A370.8.3 Hardness conversion tables for metals are presented in ASTM E140.8.4 Terms used in AMS are clarified in ARP1917.SAE INTERNATIONAL AMS64
39、37J Page 6 of 68.5 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:AMS6437JProduct form and size of product desiredQuantity of product desired.PREPARED BY AMS COMMITTEE “E”
