SAE-AMS-2370J-2007.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: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org AMS 2370J AEROSPACE MATERIAL SPECIFICATION Issued 1969-05 Revised 2007-11 Superseding AMS 2370H Quality Assurance Sampling and Testing Carbon and Low-Alloy Steel Wrought Products and Forging Stock RATIONALE AMS 2370J results from a Five Year Review and update of this specification. 1. SCOPE This specification covers quality assurance sampling and testing procedures used to determine conformance to applicable specification requirements of wrought carbon and low-alloy steel products and of forging stock. 1.1 Attributes included in detail herein are: Composition, tensile properties, macrostructure, and micro-inclusion rating. Other requirements are included in Table 2. 1.2 Quality assurance sampling and testing procedures for forgings are covered in AMS 2372. 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 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 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. AMS 2372 Quality Assurance Sampling and Testing, Carbon and Low-Alloy Steel Forgings 2.2 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 E 8 Tension Testing of Metallic Materials SAE AMS 2370J - 2 - 3. TECHNICAL REQUIREMENTS 3.1 General 3.1.1 Omission from this specification of confirmatory tests of certain material properties or attributes controlled by the applicable material specification does not relieve the vendor of responsibility for furnishing products which conform in all respects to the applicable material specification. 3.1.2 In 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 the product 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 Lot A lot shall be as defined in 3.3.1.1 or 3.3.1.2; the applicable definition being as specified in Table 2 for the type of test and type of product being tested. 3.3.1.1 A lot shall be all product identifiable to a single heat. 3.3.1.1.1 A heat shall be all steel melted in a single furnace charge. For consumable electrode remelted steel, a heat shall be all consumable electrode remelted ingots processed from steel originally melted as a single furnace charge. 3.3.1.2 A lot shall be a mill form of one shape, condition, and nominal cross-sectional dimensions from a single heat, processed in accordance with 3.3.1.2.1 or 3.3.1.2.2. 3.3.1.2.1 Sequentially heat treated during a 24-hour period in a continuous furnace with no interruption in operations and no change in furnace temperature, charge rate, or racking pattern. 3.3.1.2.1.1 The nominal cross-sectional dimension restriction may be disregarded when multiple sizes are heat treated in a single batch or during an eight-hour period in a continuous furnace operating at a constant speed. In such cases, tensile and macrostructure testing shall be performed on the size having the greatest equivalent round cross-section. The equivalent round cross-section shall be determined by multiplying wall thickness of tubing and thickness or diameter of solids by the shape factors shown in Table 1. TABLE 1 - SHAPE FACTORS Product Shape Factor Tubing 2.0 Rounds 1.0 Hexagons 1.1 Squares 1.25 Flats 1.50 3.3.1.2.2 Sequentially 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 at the same power setting, set temperature, soak time, quench parameters, and racking pattern. SAE AMS 2370J - 3 - 3.3.2 Sampling and Testing Shall be in accordance with Table 2 and as follows: 3.3.2.1 Composition 3.3.2.1.1 The reported chemical composition of the steel subjected to a single melting operation shall be that of a sample taken immediately before or during the pouring of a heat. Analysis results of the sample shall be within the composition limits established by the material specification, excluding any consideration of product check analysis. 3.3.2.1.1.1 If the sample of 3.3.2.1.1 is lost, a new sample shall be taken from the semi-finished or finished product. 3.3.2.1.2 For remelted steels, analyses shall be obtained from the remelted ingot or product thereof in accordance with a sampling plan that will allow the reported chemical composition of the steel to conform to one of the following options: The average of all ingots in the remelted heat. The average of the ingots directly involved with the order. The average of samples representing the first and last usable metal poured from the heat. The analysis of each ingot involved with the order. 3.3.2.1.2.1 If an average for an element is reported, each analysis of the element shall fall within the compositional limits established by the material specification; each individual analysis may include the applicable product check analysis allowance, but no average shall include analyses which are both above and below the compositional limits. 3.3.2.1.2.2 When the remelting method is vacuum-arc remelting and the applicable material specification establishes minimum values for carbon and/or manganese, these elements shall be determined and reported for each remelted ingot. 3.3.2.1.2.3 The heat analysis may be used for reporting the analyses of those elements governed only by a maximum in the material specification if the analysis is within the compositional limits and the element routinely decreases or remains constant during remelting. 3.3.2.1.2.4 Analyses of samples made prior to discard need not be reported. 3.3.2.2 Tensile Specimen Orientation, Location, and Size Tensile specimens conforming to ASTM E 8 shall be cut from the semi-finished or finished product in the direction indicated below, and shall be cut from the locations and to the sizes specified. The sample shall consist of one or more sections of the product selected to represent a specific location or locations with respect to the order of pouring of the selected ingot or ingots and with respect to the location within the ingot. 3.3.2.2.1 Sheet, Strip, and Plate 3.3.2.2.1.1 Orientation Specimens shall be taken with the axis of the specimen perpendicular to the direction of rolling from widths 9 inches (229 mm) and over and parallel to the direction of rolling from widths under 9 inches (229 mm). When short-transverse tensile properties are specified in the applicable material specification, specimens shall be taken with the axis of the specimen parallel to the thickness direction of the product. SAE AMS 2370J - 4 - 3.3.2.2.1.2 Location and Size 3.3.2.2.1.2.1 Longitudinal and Long-Transverse Specimens The standard ½ inch (12.7 mm) wide rectangular specimen or pin-loaded tensile specimen with 2-inch (50.8-mm) gage length shall be used for sheet, strip, and plate 0.625 inch (15.88 mm) and under in nominal thickness. For plate 0.625 to 0.750 inch (15.88 to 19.05 mm), inclusive, in nominal thickness, either the standard ½ inch (12.7 mm) wide rectangular specimen with 2-inch (50.8-mm) gage length or the standard ½ inch (12.7 mm) round tensile specimen with 2-inch (50.8- mm) gage length or a smaller, round specimen proportional to the standard shall be used. For plate over 0.750 inch (19.05 mm) in nominal thickness, the standard ½ inch (12.7 mm) round tensile specimen with 2-inch (50.8-mm) gage length or smaller, round specimen proportional to the standard shall be used. The tensile specimen shall be located midway between the faces of product 1-½ inches (38.1 mm) and under in nominal thickness and midway from center to surface for product over 1-½ inches (38.1 mm) in nominal thickness. 3.3.2.2.1.2.2 Short-Transverse Specimens For plate 2-½ inches (63.5 mm) and over in nominal thickness, subsize round tensile specimens, proportional to the standard, shall be used when thickness is insufficient to accommodate standard ½ inch (12.7 mm) round tensile specimens with 2-inch (50.8 mm) gage length. Short-transverse testing is not applicable for plate under 2-½ inches (63.5 mm) in nominal thickness. 3.3.2.2.2 Bar, Rod, and Wire 3.3.2.2.2.1 Orientation Specimens shall be taken with the axis of the specimen in the longitudinal direction except that, when long-transverse tensile properties are specified in the applicable material specification, specimens shall be taken with the axis of the specimen perpendicular to the rolling or extruding direction. When short-transverse tensile properties are specified for rectangular bar in the applicable material specification, specimens shall be taken with the axis of the specimen parallel to the thickness direction of the bar. 3.3.2.2.2.2 Location and Size 3.3.2.2.2.2.1 Longitudinal and Long-Transverse Specimens If the product size or shape makes it impractical to use full-section specimens, the standard ½ inch (12.7 mm) round tensile specimen with 2-inch (50.8-mm) gage length or a smaller, round specimen proportional to the standard, shall be used, except that for rectangular bar 0.625 inch (15.88 mm) and under in nominal thickness, the standard ½ inch (12.7 mm) wide rectangular specimen or pin-loaded tensile specimen with 2-inch (50.8-mm) gage length may be used. The tensile specimen shall be located at the center for product 1-½ inches (38.1 mm) and under in nominal diameter, thickness, or distance between flats and midway from center to surface for product over 1-½ inches (38.1 mm) in nominal thickness. 3.3.2.2.2.2.2 Short-Transverse Specimens For bar 2-½ inches (63.5 mm) and over in nominal thickness, subsize round tensile specimens, proportional to the standard, shall be used when thickness is insufficient to accommodate standard ½ inch (12.7 mm) round tensile specimens with 2-inch (50.8-mm) gage length. Short-transverse testing is not applicable for bar under 2-½ inches (63.5 mm) in nominal thickness. 3.3.2.2.3 Tubing 3.3.2.2.3.1 Orientation Specimens shall be taken with the axis of the specimen in the longitudinal direction except that, when long-transverse tensile properties of square or rectangular tubing are required by the applicable material specification, specimens shall be taken with the axis of the specimen perpendicular to the drawing or extruding direction. -,-,- SAE AMS 2370J - 5 - 3.3.2.2.3.2 Longitudinal Specimens Specimens from round and square tubing shall be the full section of the tubular product unless limitations of the testing machine preclude the use of such specimens. Snug-fitting metal plugs shall be inserted into the ends of tubular specimens to a sufficient depth to permit the jaws of the testing machine to grip the specimen properly without crushing. The plugs shall not extend into that portion of the specimen to be tested. Care shall be exercised to ensure that the load is applied axially. The length of full-section specimens shall be determined by the gage length specified for measuring elongation. For large-size tubing, or when it is not possible to test in full section, longitudinal specimens shall be obtained from strips cut from the tube. Either ½ inch (12.7 mm) wide rectangular or subsize round tensile specimens, proportional to the standard, (for thick-wall tube) shall be machined from these strips. Longitudinal strip-type tensile specimens from welded tubing shall not include weld bead. For thick-wall tubing for which subsize round tensile specimens are used, when the nominal wall thickness is under 1-½ inches (38.1 mm), specimens shall be taken midway between the inner and outer surface of the tubing; when the nominal wall thickness is 1-½ inches (38.1 mm) and over, specimens shall be taken at one-quarter wall thickness, referencing from either OD or ID. 3.3.2.2.3.3 Long-Transverse Specimens Rectangular specimens or subsize round specimens, proportional to the standard, shall be used for square or rectangular tubing. Rectangular or round tensile specimens of the largest possible dimensions, proportional to the standard, shall be used when standard size specimens cannot be obtained. For thick walled tubing, a round tensile specimen shall be taken midway between the inner and outer surface of the tubing when the nominal wall thickness is under 1-½ inches (38.1 mm); when the nominal wall thickness is 1-½ inches (38.1 mm) and over, specimens shall be taken at one-quarter wall thickness, referencing from either OD or ID. 3.3.2.2.4 Shapes 3.3.2.2.4.1 Orientation Specimens shall be taken with the axis of the specimen in the longitudinal direction except that, when long-transverse tensile properties are specified in the applicable material specification, specimens shall be taken with the axis of the specimen perpendicular to the rolling or extruding direction. When short-transverse tensile properties of shapes are specified in the applicable material specification, specimens shall be taken with the axis of the specimen parallel to the thickness direction of the shape. 3.3.2.2.4.2 Location and Size 3.3.2.2.4.2.1 Longitudinal Specimens If the product size or shape makes it impractical to use full-section specimens, the standard ½ inch (12.7-mm) round tensile specimen with 2-inch (50.8-mm) gage length or smaller round specimen, proportional to the standard, shall be used except that, for shapes under ½