1、AEROSPACE MATERIAL SPECIFICATION AMS7849 REV. E Issued 1960-06 Reaffirmed 2010-05 Revised 2015-01 Superseding AMS7849D Tantalum Sheet, Strip, and Plate Annealed (Composition similar to UNS R05210) RATIONALE AMS7849E is a Five Year Review and update of this specification. 1. SCOPE 1.1 Form This speci
2、fication covers tantalum in the form of sheet, strip, plate, and foil up through 0.1875 inch (4.75 mm), inclusive. 1.2 Application Primarily for parts requiring exposure to ultra-high temperatures. Applications in oxidizing atmospheres necessitate a protective coating. 2. APPLICABLE DOCUMENTS The is
3、sue 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 an
4、d 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. AMS2242
5、Tolerances, Corrosion and Heat-Resistant Steel, Iron Alloy, Titanium, and Titanium Alloy Sheet, Strip, and Plate AMS2350 Standards and Test Methods AMS2809 Identification, Titanium and Titanium Alloy Wrought Products _ SAE Technical Standards Board Rules provide that: “This report is published by SA
6、E 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
7、 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 International All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any f
8、orm 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 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: ht
9、tp:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AMS7849E SAE INTERNATIONAL AMS7849E Page 2 of 6 2.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA
10、 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM E8 / E8M Tension Testing of Metallic Materials ASTM E112 Determining Average Grain Size ASTM E290 Bend Testing for Ductility of Materials ASTM E384 Knoop and Vickers Hardness of Materials 3. TECHNICAL REQUIREMENTS 3.1 Composition Shall conform to th
11、e following percentages by weight shown in Table 1, determined by analytical methods approved by purchaser (See 8.2): 3.1.1 Tantalum Shall be not less than 99.85%. 3.1.2 Other Elements Shall be not more than 0.15% (1500 ppm) total. Individual elements shall not exceed the following limits in parts p
12、er million (ppm): Table 1 - Composition Element Nominal Thickness Up to 0.010 Inch (0.25 mm), excl Nominal Thickness 0.010 Inch (0.25 mm) and Over Columbium 1000 1000 Tungsten 300 300 Oxygen 150 100 Iron 100 100 Zirconium 100 100 Molybdenum 100 100 Carbon 75 50 Nitrogen 75 50 Titanium 50 50 Silicon
13、50 50 Nickel 50 50 Cobalt 20 20 Hydrogen 10 10 3.2 Condition Cold rolled and annealed (See 8.3). SAE INTERNATIONAL AMS7849E Page 3 of 6 3.3 Annealing The product shall be annealed under vacuum (less than 0.1 micron (1 m) mercury) to produce a recrystallized microstructure, meeting the requirements o
14、f Table 2. Table 2 Nominal Thickness Inch Nominal Thickness Millimeters Percent Recrystallization Up to 0.060, excl Up to 1.52, excl 95 0.060 to 0.1875, excl 1.52 to 4.76, excl 90 0.1875 and over 4.76 and over 85 3.4 Properties The product shall conform to the following requirements (See 8.2 and 8.3
15、): 3.4.1 Tensile Properties Shall be as specified in Table 3, determined 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 a
16、nd 0.05 inch/inch/minute (0.05 mm/mm/minute) and maintained within a tolerance of 0.02 inch/inch/minute (0.02 mm/mm/minute) above the yield strain to fracture: Table 3A Inch/pound units Nominal Thickness Inch Tensile Strength ksi, min Yield Strength at 0.2% Offset ksi, min Elongation in 2 Inches or
17、4D %, min Up to 0.005, incl 30 20 15 Over 0.005 to 0.016, incl 30 20 20 Over 0.016 to 0.1875, incl 30 20 25 Table 3B SI units Nominal Thickness Millimeters Tensile Strength MPa, min Yield Strength at 0.2% Offset MPa, minimum Elongation in 50.8 mm or 4D %, minimum Up to 0.13, incl 207 138 15 Over 0.1
18、3 to 0.41, incl 207 138 20 Over 0.41 to 4.76, incl 207 138 25 3.4.1.1 Tensile properties of product over 0.1875 inch (4.76 mm) in nominal thickness shall be as agreed upon by purchaser and producer. 3.4.2 Hardness Should be not higher than 150 HV30, or equivalent, determined in accordance with ASTM
19、E384, but the product shall not be rejected on the basis of hardness if the tensile property requirements are met. 3.4.3 Bending The product 0.1875 inches (4.76 mm) and under shall withstand, without evidence of cracking when examined at 20X magnification, bending in accordance with ASTM E290 at roo
20、m temperature through an angle of 180 degrees around a diameter equal to the nominal thickness of the product with axis of bend parallel to the direction of rolling. In case of dispute, results of bend tests using the end supported guided bend test shall govern. SAE INTERNATIONAL AMS7849E Page 4 of
21、6 3.4.4 Average Grain Size Shall be not coarser than specified in Table 4, determined in accordance with ASTM E112. Table 4 Nominal Thickness Inch Nominal Thickness Millimeters Average Grain Size Up to 0.1875, incl Up to 4.76, incl 5 Over 0.1875 Over 4.76 4 3.5 Quality The product, as received by pu
22、rchaser, shall be uniform in quality and condition, sound, smooth, and free from foreign materials and from imperfections detrimental to usage of the product. 3.6 Tolerances Shall conform to all applicable requirements of AMS2242. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The
23、 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 specified requirements. 4.2
24、 Classification of Tests Tests to determine conformance to all technical requirements of this specification are classified as acceptance tests and shall be performed on each heat or lot as applicable. 4.3 Sampling Shall be in accordance with the following; a lot shall be all product of the same nomi
25、nal size from the same heat processed at the same time and presented for producers inspection at one time. 4.3.1 Composition One sample from each heat, except that for carbon, oxygen, nitrogen, and hydrogen determinations one sample from each lot. 4.3.2 Recrystallized Microstructure One sample from
26、each lot. 4.3.3 Tensile Properties, Hardness, Bending, and Average Grain Size One sample from each lot. 4.3.3.1 Tensile specimens from widths 9 inches (229 mm) and over shall be taken with axis of specimen perpendicular to the direction of rolling; for widths under 9 inches (229 mm), specimens shall
27、 be taken with axis parallel to the direction of rolling. 4.3.3.2 For bend tests, minimum specimen width shall, when possible, be not less than 10 times the nominal thickness; maximum width need not be greater than 1 inch (25 mm). SAE INTERNATIONAL AMS7849E Page 5 of 6 4.4 Reports 4.4.1 The producer
28、 of the product shall furnish with each shipment a report showing the results of tests for composition of each heat, the results of tests to determine conformance to the carbon, oxygen, nitrogen, and hydrogen contents, the tensile, hardness, and bending properties, and average grain size of each lot
29、, and stating that the product conforms to the other technical requirements of this specification. This report shall include the purchase order number, heat number, AMS7849E, thickness, size, and quantity. 4.4.2 The producer of finished or semi-finished parts shall furnish with each shipment a repor
30、t showing the purchase order number, AMS7849E, contractor or other direct supplier of product, part number, and quantity. When product for making parts is produced or purchased by the parts producer, that producer shall inspect each lot of product to determine conformance to the requirements of this
31、 specification and shall include in the report either a statement that the product conforms or copies of laboratory reports showing the results of tests to determine conformance. 4.4.3 When the product is outside the range covered by Table 3, the report shall contain a statement to that effect. 4.5
32、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. Failure of any retest specimen to meet the specified requi
33、rements 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 Packaging The product shall be prepared for shipment in accord
34、ance 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 number and its revision letter
35、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 left margin is for the convenience of the user in locating are
36、as 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 not used in original publications, nor in
37、documents that contain editorial changes only. 8.2 Higher purity material is available and may be negotiated with the supplier. If higher purity material is procured, both the tensile property and grain size requirements must be negotiated, as those given in 3.4.1 and 3.4.4, respectively, will no lo
38、nger apply. 8.3 These products may be procured cold rolled to a specified strength level. In such case the as-received tensile strength, hardness, and bending requirements shall be as agreed upon by purchaser and producer. SAE INTERNATIONAL AMS7849E Page 6 of 6 8.4 Terms used in AMS are clarified in
39、 ARP1917. 8.5 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 sho
40、uld specify not less than the following: AMS7849E Form and size or part number of product desired Quantity of product desired Microstructure standards for acceptance (See 3.3) Property and acceptance requirements from the cognizant engineering organization applicable to sizes outside the size range of Table 3. PREPARED BY AMS COMMITTEE “G”
