1、_ SAE Technical Standards Board Rules provide WKDW7KLVUHSRUWLVSXEOLVKHGE6$(WRDGYDQFHWKHVWDWHRIWHFKQLFDOD QGHQJLQHHULQJVFLHQFHV7KHXVHRIWKLVUHSRUWLVentirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefrRPLVWKHVROHUHVSRQVLELOL
2、WRIWKHXVHU 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 2017 SAE International All rights reserved. No part of this publication may be reproduced, stored
3、 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 (outside USA) Fax: 724-776-0790 Em
4、ail: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/standards.sae.org/AMS7850E AEROSPACE MATERIAL SPECIFICATION AMS7850 REV. E Issued 1960-06 Revised 2013-10 Reaffirmed 2017-04 Superseding AMS7850D Col
5、umbium (Niobium) Sheet, Strip, and Foil (Composition similar to UNS R04211) RATIONALE AMS7850E has been reaffirmed to comply with the SAE Five-Year Review policy. 1. SCOPE 1.1 Form This specification covers columbium in the form of sheet, strip, plate, and foil. 1.2 Application This material has bee
6、n used typically for parts requiring exposure to ultra-high temperatures, but usage is not limited to such applications. Applications in oxidizing atmospheres necessitate a protective coating. Although produced in the cold rolled condition, this material is intended to be used in the annealed condit
7、ion. 1.3 This alloy is frequently, and equivalently, called Niobium. 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 documen
8、t 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-
9、0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside 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 INTERNATIONAL
10、AMS7850( Page 2 of 5 2.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19248-2959, Tel: 610-832-9585, www.astm.org. ASTM E 8 / E 8M Tension Testing of Metallic Materials ASTM E 290 Bend Testing of Material for Ductility ASTM E 2626 S
11、pectrometric Analysis of Reactive and Refractory Metals 3. TECHNICAL REQUIREMENTS 3.1 Composition Shall conform to the percentages by weight shown in Table 1. Metallic elements shall be determined by spectrochemical methods in accordance with ASTM E 2626 or by other analytical methods acceptable to
12、purchaser, carbon shall be determined by the combustion method using an infrared detection system; oxygen, nitrogen and hydrogen shall be determined by the inert gas fusion technique; nitrogen may also be determined by the Kjeldahl technique. TABLE 1 - COMPOSITION Element min max Tantalum Oxygen Zir
13、conium Iron Nitrogen Carbon Silicon Titanium Hydrogen Other Elements, each (3.1.1) Other Elements, total (3.1.1) Columbium (Niobium) - - - - - - - - - - - remainder 0.10 0.030 (300 ppm) 0.010 (100 ppm) 0.010 (100 ppm) 0.010 (100 ppm) 0.005 ( 50 ppm) 0.005 ( 50 ppm) 0.005 ( 50 ppm) 0.002 ( 20 ppm) 0.
14、010 0.15 3.1.1 Determination not required for routine acceptance. 3.2 Condition The product shall be supplied in the following condition: 3.2.1 Sheet, Strip, and Foil Cold rolled. 3.2.2 Plate Cold rolled or hot-cold rolled, and descaled. 3.3 Properties The product shall conform to the following requ
15、irements: 3.3.1 As Received Shall be as agreed upon by purchaser and vendor. SAE INTERNATIONAL AMS7850( Page 3 of 5 3.3.2 Capability after Annealing Product, annealed under vacuum (less than 0.1 micron (0.1 m) mercury), in inert atmosphere, or with suitable protective coating, shall have the followi
16、ng properties: 3.3.2.1 Tensile Properties Shall be as follows, determined in accordance with ASTM E 8 / E 8M with the rate of strain 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%
17、 offset yield strain and 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. 3.3.2.1.1 Product 0.010 Inch (0.25 mm) and Over in Nominal Thickness Shall be as shown in Table 2. TABLE 2 - MINIMUM T
18、ENSILE PROPERTIES Property Value Tensile Strength Elongation in 2 inches (50.8 mm) or 4D 30.0 ksi (207 MPa) 18% 3.3.2.2 Bending The product shall withstand, without evidence of cracking when examined at 20X magnification, bending in accordance with ASTM E 290 through the angle shown in Table 3 aroun
19、d a diameter equal to the nominal thickness of the product with axis of bend parallel to the direction of rolling. TABLE 3 - MINIMUM BEND ANGLE Nominal Thickness Inch Nominal Thickness Millimeters Angle Degrees Up to 0.249, incl Up to 6.32, incl 180 Over 0.249 to 0.749, incl Over 6.32 to 19.02, incl
20、 90 3.4 Quality The product, as received by purchaser, 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. 4. QUALITY ASSURANCE PROVISIONS
21、 4.1 Responsibility for Inspection The vendor of the product shall supply all samples for vendors test 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 confor
22、ms 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 AMS7850( Page 4 of 5 4.3 Sampling and Testing Shall be in accordance with the following; a lot shall be all product of
23、 the same nominal thickness from the same heat (or batch if made by powder compacting) processed at the same 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 Tensile Properties and Bending Require
24、ments One sample from each lot. 4.3.2.1 Tensile specimens shall be taken with axis parallel to direction of rolling. 4.3.2.2 For bend tests, minimum specimen width shall, when possible, be not less than 10 times nominal thickness; maximum width need not be greater than 1 inch (25 mm). 4.4 Reports Th
25、e producer of the product shall furnish with each shipment a report showing the producer identity and country where the metal was melted (i.e., final melt in the case of metal processed by multiple melting operations) and the results of test for composition of each heat or batch and for carbon, oxyg
26、en, nitrogen, and hydrogen content, tensile properties, and bending requirements of each lot and stating that the product conforms to the other technical requirements. This report shall include the purchase order number, heat or batch number, lot number, AMS7850E, product form, size, and quantity. 4
27、.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 two additional specimens for each original nonconforming specimen. Failure of any retest specimen to meet the specified requ
28、irements shall be cause for rejection of the product represented. Results of all tests shall be reported. 5. PREPARATION FOR DELIVERY 5.1 Identification Shall be in accordance with AMS2809, except foil shall be identified as specified by purchaser. 5.2 Packaging The product shall be prepared for shi
29、pment 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 vendor shall include this specification number and its rev
30、ision 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. SAE INTERNATIONAL AMS7850( Page 5 of 5 8. NOTES 8.1 A change bar (|) located in the left margi
31、n 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 bars an
32、d (R) are not used in original publications, nor in documents that contain editorial changes only. 8.2 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 equivalent
33、s of the primary units and are presented only for information. 8.3 Hardness Should not be higher than 160 HV30, or equivalent, determined in accordance with ASTM E 92, but product should not be rejected for hardness if all other requirements are met. 8.4 Terms used in AMS are clarified in ARP1917. 8.5 Purchase documents should specify not less than the following: AMS7850E Product form and size of product desired Quantity of product desired. PREPARED BY AMS COMMITTEE “G“
