1、AEROSPACE MATERIAL SPECIFICATION AMS7847 REV. D Issued 1965-09 Reaffirmed 2010-05 Revised 2015-01 Superseding AMS7847C Tantalum Alloy Sheet, Strip, and Plate 90Ta - 10W (Composition similar to UNS R05255) RATIONALE AMS7847D is a Five Year Review and update of this specification. 1. SCOPE 1.1 Form Th
2、is specification covers a tantalum alloy in the form of sheet, strip, and plate from 0.010 through 0.250 inch (0.25 through 6.35 mm), inclusive. 1.2 Application Primarily for parts requiring exposure to ultra-high temperatures. Applications in oxidizing atmospheres necessitate a protective coating.
3、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
4、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 (outs
5、ide USA, www.sae.org. AMS2242 Tolerances, Corrosion and Heat-Resistant Steel, Iron Alloy, Titanium, and Titanium Alloy Sheet, Strip, and Plate AMS2809 Identification, Titanium and Titanium Alloy Wrought Products _ SAE Technical Standards Board Rules provide that: “This report is published by SAE to
6、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 leas
7、t every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2015 SAE International All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form o
8、r 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 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/w
9、ww.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AMS7847D SAE INTERNATIONAL AMS7847D Page 2 of 5 2.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 1942
10、8-2959, Tel: 610-832-9585, www.astm.org. ASTM E8 / E8M Tension Testing of Metallic Materials ASTM E290 Bend Testing Materials for Ductility ASTM E384 Knoop and Vickers Hardness of Materials 3. TECHNICAL REOUIREMENTS 3.1 Composition Shall conform to the following percentages by weight shown in Table
11、1; carbon shall be determined conductometrically, oxygen by the inert gas or vacuum fusion method, nitrogen by the Kjeldahl method or by vacuum fusion, hydrogen by the vacuum fusion or vacuum extraction method, and metallic elements by spectrochemical methods or by other analytical methods acceptabl
12、e to purchaser. Table 1 - Composition Element min max Tungsten 8.50 11.00 Columbium - 0.10 Molybdenum - 0.030 Nickel - 0.010 Iron - 0.010 Carbon - 0.010 Oxygen - 0.010 (100 ppm) Nitrogen - 0.005 ( 50 ppm) Hydrogen - 0.001 ( 10 ppm) Tantalum remainder 3.2 Condition Cold rolled and fully annealed, hav
13、ing a surface appearance comparable to a commercial corrosion-resistant steel No. 2D finish (See 8.2). 3.3 Properties The product shall conform to the following requirements: 3.3.1 Tensile Properties Shall be as follows for product 0.010 to 0.250 inch (0.25 to 6.35 mm), incl, in nominal thickness, d
14、etermined in accordance with ASTM E8 / E8M with the rate of strain set at 0.005 inch/inch/minute (0.005 mm/mm/minute) and maintained within a tolerance of 0.002 inch/inch/minute (0.002 mm/mm/minute) through the 0.2% offset yield strain and 0.05 inch/inch/minute (0.05 mm/mm/minute) and maintained wit
15、hin a tolerance of 0.02 inch/inch/minute (0.02 mm/mm/minute) above the yield strain to fracture: Table 2 Tensile properties Property Value Tensile Strength, minimum 70 ksi (483 MPa) Yield Strength at 0.2% Offset, minimum 60 ksi (414 MPa) Elongation in 1 Inch (25.4 mm), minimum 15% SAE INTERNATIONAL
16、AMS7847D Page 3 of 5 3.3.1.1 Tensile property requirements for product under 0.010 inch (0.25 mm) or over 0.250 inch (6.35 mm) in nominal thickness shall be as agreed upon by purchaser and producer. 3.3.2 Hardness Not higher than 260 HV10, or equivalent, determined in accordance with ASTM E384. 3.3.
17、3 Bending Sheet and strip 0.187 inch (4.75 mm) and under in nominal thickness shall withstand, without evidence of cracking when examined at 20X, bending in accordance with ASTM E290 at room temperature through an angle of 105 degrees around a diameter equal to twice the nominal thickness of the pro
18、duct with axes of bend both parallel and perpendicular to the direction of rolling, using a ram speed of not less than 1 inch/minute (0.423 mm/second). In case of dispute, results of bend tests using the end supported guided bend test procedure shall govern. 3.4 Quality The product, as received by p
19、urchaser, shall be uniform in quality and condition, sound, and free from foreign materials and from imperfections detrimental to usage of the product. 3.5 Tolerances Shall conform to all applicable requirements of AMS2242 and the following: 3.5.1 Flatness When measured using a straight edge touchin
20、g the product at two points, the perpendicular distance from the straight edge to the sheet shall not exceed 0.05 L inches (0.05 L mm) at any point between the two points of contact, where “L“ is the distance in inches (mm) between the two points of contact. 4. QUALITY ASSURANCE PROVISIONS 4.1 Respo
21、nsibility 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 product conforms to
22、 specified requirements. 4.2 Classification of Tests Tests for all technical requirements are acceptance tests and shall be performed on each heat or lot as applicable. 4.3 Sampling and Testing Shall be in accordance with the following; a lot shall be all product of the same nominal thickness, from
23、the same heat, processed at one time: 4.3.1 Composition One specimen from each heat, except that for carbon, oxygen, nitrogen, and hydrogen determination one specimen from each lot. 4.3.2 Tensile and Bend Properties One specimen from each lot. 4.3.2.1 Tensile specimens from widths 9 inches (229 mm)
24、and over shall be taken with the axis of the specimen perpendicular to the direction of rolling; for widths under 9 inches (229 mm), specimens shall be taken with the axis parallel to the direction of rolling. SAE INTERNATIONAL AMS7847D Page 4 of 5 4.3.2.2 Bend specimens shall be nominally 0.5 inch
25、(13 mm) wide by not less than 2 inches (51 mm) long and shall be deburred. 4.4 Reports 4.4.1 The producer of the product shall furnish with each shipment a report showing the results of tests for composition of each heat and of tests on each lot to determine conformance to the carbon, oxygen, nitrog
26、en, and hydrogen content, tensile properties, and bending requirements and stating that the product conforms to the other technical requirements. This report shall include the purchase order number, lot number, AMS7847D, size, and quantity. 4.4.2 When the product is outside the range covered by 3.3.
27、1, the report shall contain a statement to that effect. 4.5 Resampling and Retesting If any specimen used in the above tests fails to meet the specified requirements, disposition of the product may be based on the results of testing three additional specimens for each original nonconforming specimen
28、. Failure of any retest specimen to meet the specified requirements shall be cause for rejection of the product represented and no additional testing shall be permitted. Results of all tests shall be reported. 5. PREPARATION FOR DELIVERY 5.1 Identification Shall be in accordance with AMS2809. 5.2 Pa
29、ckaging 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 carrier acceptance and safe delivery. 6. ACKNOWLEDGMENT A producer shal
30、l include this specification number 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 A change bar (l) located in the le
31、ft 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 of the document title indicates a complete revision of the document, including technical revisions. Change
32、 bars and (R) are not used in original publications, nor in documents that contain editorial changes only. 8.2 Commercial corrosion-resistant steel finishes are defined in ASTM A480/A480M and AS4194. 8.3 Terms used in AMS are clarified in ARP1917. 8.4 Dimensions and properties in inch/pound units an
33、d 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. SAE INTERNATIONAL AMS7847D Page 5 of 5 8.5 Purchase documents should specify not less than the following: AMS7847D Form and size of product required Quantity of product required Property and acceptance requirements from the cognizant engineering organization applicable to sizes outside the size ranges listed in 1.1. PREPARED BY AMS COMMITTEE “G“
