SAE-AMS-2374D-2002-R2007.pdf

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 therefrom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright © 2007 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 permission of SAE. TO PLACE A DOCUMENT ORDER:Tel: 877-606-7323 (inside USA and Canada) Tel: 724-776-4970 (outside USA) Fax: 724-776-0790 Email: custsvcsae.org SAE WEB ADDRESS:http:/www.sae.org Quality Assurance Sampling and Testing Corrosion and Heat-Resistant Steel and Alloy Forgings RATIONALE This document has been reaffirmed to comply with the SAE 5-year Review policy. 1. SCOPE: This specification covers quality assurance sampling and testing procedures used to determine conformance to applicable material specifications of corrosion and heat-resistant steel and alloy forgings. 1.1Quality assurance sampling and testing procedures for forging stock are covered in AMS 2371. 2. APPLICABLE DOCUMENTS: The issue of the following documents in effect on the date of the purchase order forms a part of this specification to the extent supplied 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 shall apply. 2.1 SAE Publications: Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001 or www.sae.org. AMS 2808Identification, Forgings AEROSPACE MATERIAL SPECIFICATION AMS 2374D IssuedJUL 1976 RevisedJUL 2002 ReaffirmedAPR 2007 Superseding AMS 2374C -,-,- AMS 2374DSAEAMS 2374D - 2 - 2.2ASTM Publications: Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959 or www.astm.org. ASTM E 8 Tension Testing of Metallic Materials ASTM E 8M Tension Testing of Metallic Materials (Metric) ASTM E 292Conducting Time-for-Rupture Notch Tension Tests of Materials 3. TECHNICAL REQUIREMENTS: 3.1 General Requirements: 3.1.1Omission from this specification of confirmatory tests of certain material properties or attributes controlled by applicable material specifications does not relieve the vendor of responsibility for furnishing products which conform in all aspects to the applicable material specification. 3.1.2In event of conflict between requirements specified herein and requirements of a particular material specification, requirements of the material specification shall take precedence. 3.2 Responsibility for Tests: The vendor of forgings shall supply all samples for vendor's tests and shall be responsible for the performance of all required tests. Results of such tests shall be reported to the purchaser as required by the applicable material specification. 3.3 Detail Requirements: 3.3.1 Classification: For the purpose of clarifying test requirements, forgings shall be classified as shown in Table 1: TABLE 1 Classifications of Forgings ClassDescription IForgings supplied in the final heat treated condition and requiring destructive testing for verification of specified mechanical properties. IIForgings supplied in any heat treated condition other than the final heat treated condition that require testing to ensure conformance to specified mechanical properties after subsequent heat treatment. IIIForgings supplied in the final heat treated condition only to a specified hardness. IVForgings supplied in a preliminary heat treated condition for machinability, welding, etc, and not subject to testing for specified mechanical properties, other than hardness, after final heat treatment. -,-,- AMS 2374DSAEAMS 2374D - 3 - 3.3.2 Lot: A lot shall be all forgings of a similar configuration, opposite hand being considered as a single configuration, identifiable to a single heat of steel or alloy and processed by either of the following methods (See 3.3.2.2 or 3.3.2.3): 3.3.2.1 Heat: A heat shall be all steel or alloy melted in a single furnace charge. For consumable electrode remelted steel or alloy, a heat shall be all consumable electrode remelted ingots processed from steel or alloy originally melted as a single furnace charge. 3.3.2.2Sequentially heat treated during a 24-hour period in a continuous furnace with no interruptions in operations and no change in furnace temperature, charge rate, or racking pattern. 3.3.2.3Sequentially heat treated during a 48-hour period in one or a series of batch-type furnace loads provided the loads are processed in the same furnace or same series of furnaces and there is no change in power, set temperature, soak time, quench parameters, or racking pattern. 3.3.3: Sampling and Testing: Shall be as follows: 3.3.3.1 Class I Forgings: Shall be sectioned and tested for conformance on the basis of at least one forging from each lot for mechanical properties other than hardness; in addition, if hardness is specified, production forgings shall be sampled for hardness as shown in Table 2. 3.3.3.1.1Once a valid hardness/tensile property relationship has been established for a given forging and heat treat cycle, the frequency of destructive testing may be reduced when permitted by purchaser, and hardness used as the conformance criterion. 3.3.3.1.2Each furnace load or container of forgings shall be included in the selection of samples. TABLE 2 Hardness Sampling Plan for Class I or Class III Forgings Lot QuantitySample Size 1 44All 45 6544 66 11060 111 18067 181 30073 301 50078 501 80080 Over 80010% or 85 pieces, min TABLE 3 Hardness Sampling Plan for Class II or Class IV Forgings Lot QuantitySample Size 1 20All 20 10025% or 20 pieces, min 101 Over10% or 25 pieces, min -,-,- AMS 2374DSAEAMS 2374D - 4 - 3.3.3.1.3All samples tested shall conform to the specified hardness or all forgings shall be tested. If all forgings are checked, the vendor may either reheat treat nonconforming forgings, submit the nonconformance to purchaser for disposition, or reject the forgings. 3.3.3.2 Class II Forgings: Samples shall be taken from each lot, heat treated as specified, sectioned, and tested to demonstrate conformance to specified requirements; in addition, if hardness is specified, production forgings shall be sampled for hardness as shown in Table 3. 3.3.3.3 Class III Forgings: Shall be sampled for hardness as shown in Table 2. 3.3.3.4 Class IV Forgings: If hardness is specified, shall be sampled as shown in Table 3. 3.3.4 Testing: Shall be as follows: 3.3.4.1Tests for properties which are characteristic of the heat, such as composition, hardenability, cleanliness, etc, need not be repeated on forgings from a heat provided that these tests have been performed on the forging stock from that heat and that heat identity of the forgings is maintained. 3.3.4.2 Test Methods: Shall be in accordance with requirements of the applicable material specification. If a test method is not specified, the method of test shall be acceptable to purchaser. 3.3.4.3 Tensile, Stress-Rupture, and Creep Properties: 3.3.4.3.1 Orientation: When destructive testing is required, orientation of the specimen shall be as follows: 3.3.4.3.2 Forgings Other Than Disc Forgings: Longitudinal specimens shall be taken with the axis of the specimen within 15 degrees of parallel to the forging flow lines, except when transverse tensile properties are required by the applicable material specification or by purchaser; in which case, specimens shall be taken with the axis of the specimen within 15 degrees of perpendicular to the forging flow lines. 3.3.4.3.3 Disc Forgings: Specimens shall be taken from any plane perpendicular to the axis of the forging, with axis of specimen in the selected plane perpendicular to a radius. When size and shape permit, additional specimens shall be taken with the axis of specimen approximately parallel to the axis of the forging. 3.3.4.3.4 Size: Specimens, except notched and combination smooth-and-notched stress-rupture specimens, shall conform to ASTM E 8 or ASTM E 8M and shall be either 0.250-inch (6.35-mm) diameter at the reduced parallel gage section, 0.500-inch (12.70-mm) diameter at the reduced parallel gage section, standard rectangular specimens, or subsize specimens proportional to the standard when the configuration of the forging does not permit the use of standard size specimens. Notched specimens and combination smooth-and-notched specimens shall conform to the respective dimensions shown in ASTM E 292. -,-,- AMS 2374DSAEAMS 2374D - 5 - 3.3.4.4 Grain Flow: When grain flow is specified, a preproduction forging shall be sectioned and macroetched to reveal the grain flow pattern. The pattern shall be in essential agreement with flow lines sketched on the drawing; if such lines are not shown on the drawing, the grain flow in areas other than those affected by end grain shall follow the general contour of the forging and shall not exhibit reentrant folds. 3.3.4.5 Decarburization, Susceptibility to Interaranular Attack, and Other Microstructural Requirements: When requirements other than cleanliness are specified, the location of specimens, frequency, and method of testing shall be selected by the vendor, unless frequency of testing is specified by purchaser or the material specification. 3.3.4.6 Nondestructive Testing: When specified, shall be performed to ensure freedom from harmful imperfections. Test methods, frequency of testing, and acceptance standards shall be as specified by purchaser. 3.3.4.7 Dimensions: Forgings shall be inspected as required to ensure conformance to dimensions shown on the applicable drawing. 3.3.4.8 Marking: Each forging shall be examined to determine that all markings are legible and conform to AMS 2808 or purchaser's requirements. 3.3.5 Resampling and Retesting: If any valid specimen used in the above tests fails to meet specified mechanical property requirements, disposition of the forgings may be based on the results of testing three additional specimens, selected as in 3.3.5.1, for each original nonconforming specimen. Except as permitted in 3.3.5.2, failure of any retest specimen to meet specified requirements shall be cause for rejection of the forgings represented. Except as permitted in 3.3.5.2, results of all tests shall be reported. 3.3.5.1Retest specimens shall be taken from essentially equivalent locations in the same forging from which the original nonconforming specimens were taken. If size or configuration prohibits obtaining three specimens from the original forging, the retest specimens shall be taken from an additional forging or forgings from the same lot. 3.3.5.2Corrective processing within the limits of any controlled procedure may be applied to nonconforming forgings in lieu of retests; in such case, the original test results need not be reported. Corrective processing outside the limits of such controlled procedures, prior to use, shall require approval by purchaser's engineering activity, and the invalid result need not be reported. 3.3.5.2.1A test may be declared invalid only if the specimen was dimensionally discrepant and that discrepancy caused the failure, or if the failure was caused by a malfunction of the test equipment or improper test procedure. When a test is declared invalid, the specimen may be replaced. -,-,- AMS 2374DSAEAMS 2374D - 6 - 4. OUALITY ASSURANCE PROVISIONS: Not applicable. 5. PREPARATION FOR DELIVERY: Not applicable. 6. ACKNOWLEDGMENT: Not applicable. 7. REJECTIONS: Not applicable. 8. NOTES: 8.1 Marginal Indicia: 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 a specification. An (R) symbol to the left of the document title indicates a complete revision of the specification. Change bars and (R) are not used in original publications, nor in specifications that contain editorial changes only. PREPARED UNDER THE JURISDICTION OF AMS COMMITTEE “F“. -,-,-