1、_SAE Technical Standards Board Rules SURYLGHWKDW7KLVUHSRUWLVSXEOLVKHGE6$(WRDGYDQFHWKHVWDWHRI WHFKQLFDODQGHQJLQHHULQJVFLHQFHV7KHXVHRIWKLVUH port is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising WKHUHIURPLVWKHVROHUHVSRQVLELO
2、LWRIWKHXVHUSAE 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 InternationalAll rights reserved. No part of this publication may be reproduced, stored i
3、n 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: 724-776-0790Email: C
4、ustomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedback on thisTechnical Report, please visithttp:/standards.sae.org/AMS7851DAEROSPACEMATERIAL SPECIFICATIONAMS7851REV. DIssued 1966-03Revised 2013-05Reaffirmed 2017-01Superseding AMS7851CColumbium (Niobium) Al
5、loy Foil, Sheet, Strip, and Plate10W - 2.5ZrRecrystallized(Composition similar to UNS R04217)RATIONALEAMS7851D has been reaffirmed to comply with the SAE five-year review policy.1. SCOPE1.1 This specification covers a columbium (niobium) alloy in the form of foil, sheet, strip, or plate.1.2 Applicat
6、ionThis material has been used typically for parts requiring exposure at ultra high-temperatures, but usage is not limited to such applications. Applications in oxidizing atmospheres necessitate a protective coating.2. APPLICABLE DOCUMENTSThe issue of the following documents in effect on the date of
7、 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
8、published issue of that document shall apply.2.1 SAE PublicationsAvailable 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 Tolerances, Corrosion and Heat Resistant Steel, Iron Allo
9、y, Titanium, and Titanium Alloy Sheet, Strip, and PlateAMS2809 Identification, Titanium and Titanium Alloy Wrought Products2.2 ASTM PublicationsAvailable 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 / E 8M T
10、ension Testing of Metallic MaterialsASTM E 21 Elevated Temperature Tension Tests of Metallic MaterialsASTM E 290 Bend Testing Material for DuctilityASTM E 384 Knoop and Vickers Hardness of Metallic MaterialsASTM E 2626 Spectrometric Analysis of Reactive and Refractory Metals3. TECHNICAL REQUIREMENTS
11、3.1 CompositionShall 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 purchaser, carbon shall be determined by the combustion method using an infrared de
12、tection system; oxygen, nitrogen and hydrogen shall be determined by the inert gas fusion technique, and columbium shall be determined by difference. TABLE 1 COMPOSITIONElement min maxTungsten 9.0 11.0Zirconium 2.0 3.0Tantalum - 0.15Carbon - 0.030Silicon - 0.02Iron - 0.02Titanium - 0.01Oxygen - 0.02
13、0 (200 ppm)Nitrogen - 0.010 (100 ppm)Hydrogen - 0.001 ( 10 ppm)Columbium (Niobium) Remainder3.2 ConditionCold rolled or hot-cold rolled, descaled, and recrystallized.3.3 Heat TreatmentProduct shall be recrystallized by heating to a temperature within the range 2200 to 2400 F (1204 to 1316 C) under Y
14、DFXXPRIDEVROXWHSUHVVXUHOHVVWKDQPLFURQ P PHUFXURULQHUWDWPRVSKHUHRUDVDJUHHGXSR QESXUFKDVHUand vendor.3.4 PropertiesThe product shall conform to the following requirements:3.4.1 Tensile PropertiesProduct, 0.010 to 0.060 inch (0.25 to 1.52 mm), inclusive, in nominal thickness, shall meet the requirement
15、s of 3.4.1.1 and 3.4.1.2.SAE INTERNATIONAL AMS7851D Page 2 of 5_3.4.1.1 At Room TemperatureShall be as shown in Table 2 for sheet and strip 0.010 to 0.060 inch (0.25 to 1.52 mm), inclusive, in nominal thickness, determined in accordance with ASTM E 8 / E 8M with the rate of strain set at 0.005 inch/
16、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 within a tolerance of 0.02 inch/inch/minute (0.02 mm/mm/minute) above the yield strain t
17、o fracture. TABLE 2 MINIMUM TENSILE PROPERTIES AT ROOM TEMPERATUREProperty ValueTensile Strength 75 ksi (517 MPa)Yield Strength at 0.2% Offset 60 ksi (414 MPa)Elongation in 1 Inch (25.4 mm) 15%3.4.1.2 At 2200 F (1204 C)Product 0.010 to 0.060 inch (0.025 to 1 .52 mm), inclusive, in nominal thickness
18、shall meet the requirements shown in Table 3 when heated to 2200 F 10 (1204 C 6) under vacuum (less than 0.1 micron mercury) or an inert atmosphere, held at heat for 15 minutes before testing, and tested at 2200 F 10 (1204 C 6) at a strain rate set at 0.05 inch/inch/minute (0.05 mm/mm/minute) and ma
19、intained within a tolerance of 0.02 inch/inch/minute (0.02 mm/mm/minute) in accordance with ASTM E 21.TABLE 3 MINIMUM TENSILE PROPERTIES AT 2200 F (1204 C)Property ValueTensile Strength 30.0 ksi (207 MPa)Yield Strength at 0.2% Offset 25.0 ksi (172 MPa)Elongation in 1 Inch (25.4 mm) 15%3.4.2 Hardness
20、Shall be not higher than 225 HV30, or equivalent, determined in accordance with ASTM E 384.3.4.3 BendingProduct shall have a test sample prepared nominally 0.750 inch (19.06 mm) in width with axis of bending parallel to the direction of rolling. The sample shall be bend tested in conformance with th
21、e guided bend test defined in ASTM E 290 through the angle shown in Table 4. The test fixture supports shall have a minimum contact radius of 0.010 inch (0.25 mm) and the plunger shall have a radius equal to one times the nominal thickness. The bent sample shall not show evidence of cracking when ex
22、amined at 15 to 25X magnification.TABLE 4 MINIMUM BEND ANGLENominal Thickness Angle degreeInches Millimeters0.001 to 0.060, incl 0.025 to 1.52, incl 180Over 0.060 Over 1.52 903.4.4 MicrostructureProduct shall show a structure consisting essentially of recrystallized grains; additional standards for
23、acceptance shall beas agreed upon by purchaser and vendor (See 8.4).SAE INTERNATIONAL AMS7851D Page 3 of 5_3.5 QualityThe product, as received by purchaser, shall be uniform in quality, condition, sound, and free from foreign materials and from imperfections detrimental to usage of the product.3.6 T
24、olerancesShall conform to all applicable requirements of AMS2242, except flatness shall conform to the following:3.6.1 FlatnessWhen measured using a straight-edge touching the product at two points, the perpendicular distance from the straight-edge to the sheet or plate shall not exceed 0.05 x L inc
25、hes (millimetres) 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 PROVISIONS4.1 Responsibility for InspectionThe vendor of the product shall supply all samples for vendors tests and shall be responsible f
26、or the performance of all required tests. Purchaser reserves the right to perform any confirmatory testing deemed necessary to ensure that the product conforms to specified requirements.4.2 Classification of Tests4.2.1 Acceptance TestsComposition (3.1), room temperature tensile properties (3.4.1.1),
27、 hardness (3.4.2), bending (3.4.3), microstructure (3.4.4), and tolerances (3.6) are acceptance tests and shall be performed on each heat or lot as applicable.4.2.2 Periodic TestsElevated temperature tensile properties (3.4.1.2) are periodic tests and shall be performed at a frequency selected by th
28、e vendor unless frequency of testing is specified by purchaser.4.3 Sampling and TestingShall be in accordance with the following; a lot shall be all product of the same nominal thickness from the same heat processed at the same time:4.3.1 CompositionOne sample from each heat, except that for carbon,
29、 oxygen, nitrogen, and hydrogen determinations one sample from eachlot.4.3.2 Tensile Properties, Hardness, Bending, and Microstructure RequirementsOne sample from each lot.4.3.2.1 Specimens for tensile tests of widths 9 inches (229 mm) and over shall be taken with the axis perpendicular to the direc
30、tion of rolling; for widths under 9 inches (229 mm), specimens shall be taken with the axis parallel to the direction of rolling.SAE INTERNATIONAL AMS7851D Page 4 of 5_4.4 ReportsThe vendor of the product shall furnish with each shipment a report showing the results of tests for chemical composition
31、 of each heat and for the carbon, oxygen, nitrogen, and hydrogen content, tensile properties, hardness, 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 and lot numbers, AMS7851D
32、, product form, size, and quantity.4.5 Resampling and RetestingIf 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
33、specimen to meet the specified requirements shall be cause for rejection of the product represented. Results of all tests shall be reported.5. PREPARATION FOR DELIVERY5.1 IdentificationShall be in accordance with AMS2809, except foil shall be identified as specified by purchaser.5.2 PackagingThe pro
34、duct 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. ACKNOWLEDGMENTA vendor shall include this spec
35、ification number and its revision letter in all quotations and when acknowledging purchase orders.7. REJECTIONSProduct not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection.8. NOTES8.1 A change bar (|) located in the left margin is for the co
36、nvenience 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 revision. Change bars and (R) are not us
37、ed in original publications, nor in documents that contain editorial changes only.8.2 Dimension 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 u
38、nitsand are presented only for information.8.3 Terms used in AMS are clarified in ARP1917.8.4 Purchase documents should specify not less than the following:AMS7851DProduct form and size of product desiredQuantity of product desiredMicrostructure standards for acceptance (See 3.4.4).PREPARED BY COMMITTEE “G“SAE INTERNATIONAL AMS7851D Page 5 of 5_
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