1、 AEROSPACE MATERIAL SPECIFICATION Graphite Yarn, Non-Structural 5 Ply Yarn, 720 Filaments 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
2、 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 suggesti
3、ons. Copyright 2005 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 D
4、OCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: 724-776-4970 (outside USA) Fax: 724-776-0790 Email: custsvcsae.org SAE WEB ADDRESS: http:/www.sae.org AMS 3890AIssued MAY 1970 Revised SEP 1996 Reaffirmed JUN 2005 Superseding AMS 3890 1. SCOPE:1.1 Form:The product shall consist of 5-ply
5、yarn having 720 continuous filaments per ply and a maximumof 4 turns per inch (25.4 mm).1.2 Application:This yarn has been used typically for weaving graphite cloth and fabric of various shapes andconstructions for fabrication of components used in ablation applications, but usage is not limitedto s
6、uch applications.1.3 Safety-Hazardous Materials:While the materials, methods, applications, and processes described or referenced in thisspecification may involve the use of hazardous materials, this specification does not address thehazards which may be involved in such use. It is the sole responsi
7、bility of the user to ensurefamiliarity with the safe and proper use of any hazardous materials and to take necessaryprecautionary measures to ensure the health and safety of all personnel involved.2. APPLICABLE DOCUMENTS:The following publications form a part of this specification to the extent spe
8、cified herein. Theapplicable issue of other publications shall be the issue in effect on the date of the purchase order.2.1 ASTM Publications:Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.ASTM D 578 Specification for Glass Fiber YarnsASTM D 1512 Carbon Black - pH Value
9、ASTM D 3176 Ultimate Analysis of Coal and CokeCopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE - 2 - AMS 3890A AMS 3890A2.2 U.S. Government Publications:Available from DODSSP, Subscription Service
10、s Desk, Building 4D, 700 Robbins Avenue,Philadelphia, PA 19111-5094.MIL-STD-2073-1 DOD Materiel, Procedures for Development and Application of PackagingRequirements2.3 SACMA Publications:Available from Suppliers of Advanced Composite Materials Association, 1600 Wilson Boulevard,Arlington, VA 22209.S
11、RM 12 Lot Acceptance of Carbon Fibers3. TECHNICAL REQUIREMENTS:The product shall conform to the requirements shown in Table 1 and 3.7.(R) TABLE 1 - PropertiesParagraph Property Requirements Test Method3.1 Assay Carbon, % by weight, min 99.0 ASTM D 31763.2 Ash Content, % by weight, max 1 .0 4.5.13.3
12、pH 6.5 to 10.0 ASTM D 15123.4 Filament Diameter, inch 0.00028 to 0.00032 ASTM D 5783.5 Density of Filament, gm/cc, min 1.43.6 Breaking Strength, lbs/ply, min 2.0 ASTM D 5783.7 Quality:Yarn, as received by purchaser, shall be uniform in quality and condition, and free from foreignmaterials and from i
13、mperfections detrimental to usage of the yarn.4. QUALITY ASSURANCE PROVISIONS:4.1 Responsibility for Inspections:The manufacturer of the yarn shall supply all samples and shall be responsible for all requiredtests. Purchaser reserves the right to sample and to perform any confirmatory testing deemed
14、necessary to ensure that the yarn conforms to the requirements of this specification.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE - 3 - AMS 3890A AMS 3890A4.2 Classification of Tests:4.2.1 Acc
15、eptance Tests: Assay carbon (3.1), density of filament (3.5), and breaking strength (3.6)are acceptance tests and shall be performed on each lot.4.2.2 Preproduction Tests: Tests for all technical requirements are preproduction tests and shall beperformed prior to or on the initial shipment of yarn b
16、y the manufacturer, when a change iningredients and/or processing requires reapproval as in 4.4.2, and when purchaser deemsconfirmatory testing to be required.4.2.2.1 For direct U.S. Military procurement, substantiating test data and, when requested,preproduction test yarn shall be submitted to the
17、cognizant agency as directed by theprocuring activity, contracting officer, or request for procurement.4.3 Sampling and Testing:Shall be as follows:4.3.1 For Acceptance Tests: Sufficient yarn shall be taken at random from each lot to perform allrequired tests. The number of determinations for each r
18、equirement shall be as specified in theapplicable test procedure or, if not specified therein, not less than three.4.3.1.1 A lot shall be all yarn from a single production run made from the same batch of raw filamentsunder the same fixed conditions and presented for manufacturers inspection at one t
19、ime.4.3.1.2 When a statistical sampling plan, has been agreed upon by purchaser, sampling shall be inaccordance with such plan in lieu of sampling as in 4.3.1.4.3.2 For Preproduction Tests: As agreed upon by purchaser and vendor.4.4 Approval:4.4.1 Sample yarn shall be approved by purchaser before ya
20、rn for production use is supplied, unlesssuch approval be waived by purchaser. Results of test on production yarn shall be essentiallyequivalent to those on the approved sample.4.4.2 Manufacturer shall use ingredients, manufacturing procedures, processes, and methods ofinspection on production produ
21、ct which are essentially the same as those used on the approvedsample. If necessary to make any change in ingredients, in type of equipment for processing,or in manufacturing procedures, manufacturer shall submit for reapproval a statement of theproposed changes in ingredients and/or processing and,
22、 when requested, sample yarn.Production yarn made by the revised procedure shall not be shipped prior to receipt ofreapproval.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE - 4 - AMS 3890A AMS 3
23、890A4.5 Test Methods:Shall be as follows:4.5.1 Ash Content: Shall be determined on triplicate samples from each spool of yarn.Approximately 5 grams of yarn shall be dried for not less than 1 hour in a circulating air oven at110 C 3 (230 F 5) and cooled in a desiccator. Accurately weigh to 0.001 gram
24、approximately 2 grams of the cooled sample into a previously dried, tared crucible, place in amuffle furnace, gradually heat to 760 C 15 (1400 F 27), hold in an oxidizing atmospherefor not less than 3 hours, then raise temperature to 870 C 15 (1598 F 27) and hold at heatfor not less than 1 hour unti
25、l ignition is complete. Remove the crucible from furnace, cool indesiccator, and weigh. Calculate ash content as shown in Equation 1.Ash Content,% = Final sample weight x 100Dry sample weight4.6 Reports:The supplier of yarn shall furnish with each shipment a report from the manufacturer showing ther
26、esults of tests to determine conformance to the acceptance test requirements and stating thatthe yarn conforms to the other technical requirements. This report shall include the purchaseorder number, lot number, AMS 3890A, manufacturers identification, quantity, and date ofmanufacture.4.7 Resampling
27、 and Retesting:Shall be in accordance with SRM 12.5. PREPARATION FOR DELIVERY:5.1 Packaging and Identification:5.1.1 Yarn shall be furnished on spools of a size acceptable to purchaser. Spools of yarn shall bewound uniformly and shall be free of telescoping.5.1.2 Spools:5.1.2.1 Identification: Each
28、spool shall be legibly marked with a label on the inside surface of thecore, or with a tag suitably attached to the spool:YARN, GRAPHITEAMS 3890AMANUFACTURERS IDENTIFICATIONQUANTITYLOT NUMBERPURCHASE ORDER NUMBERDATE OF MANUFACTURE(Eq.1)Copyright SAE International Provided by IHS under license with
29、SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE - 5 - AMS 3890A AMS 3890A5.1.2.2 Spool Wrap: Each spool of yarn shall be packaged to protect it from damage andcontamination.5.1.2.3 A lot may be packaged in small quantities and delivered under the basic lot a
30、pproval provided(R) lot identification is maintained.5.1.3 Exterior Packaging:5.1.3.1 Individual wrapped spools of product shall be packaged in an exterior shipping container sothat the spools, during normal handling, shipping and storage will be protected from exposureto moisture, weather, or any o
31、ther normal hazard.5.1.3.2 Each shipping container shall be permanently and legibly marked with not less than thefollowing information:YARN, GRAPHITEAMS 3890APURCHASE ORDER NUMBERLOT NUMBERMANUFACTURERS IDENTIFICATIONNUMBER OF SPOOLSNET WEIGHTGROSS WEIGHT5.1.4 Packages of the yarn shall be prepared
32、for shipment in accordance with commercial practiceand in compliance with applicable rules and regulations pertaining to the handling, packagingand transportation of the yarn to ensure carrier acceptance and safe delivery.5.1.5 For direct U.S. Military procurement, packaging shall be in accordance w
33、ith MIL-STD-2073-1,(R) Level C, unless Level A is specified in the request for procurement.6. ACKNOWLEDGMENT:A supplier shall mention this specification number and its revision letter in all quotations and whenacknowledging purchase orders.7. REJECTIONS:Yarn not conforming to this specification or t
34、o modifications authorized by purchaser will be subjectto rejection.8. NOTES:8.1 The (R) symbol is for the convenience of the user in locating areas where technical revisions, noteditorial changes, have been made to the previous issue of this specification. If the symbol isnext to the specification
35、title, it indicates a complete revision of the specification.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE - 6 - AMS 3890A AMS 3890A8.2 For direct U.S. Military procurement, purchase documents
36、should specify not less than thefollowing:Title, number, and date of this specificationQuantity of yarn desiredLevel A packaging, if required (See5.1.5).PREPARED UNDER THE JURISDICTION OF AMS COMMITTEE “P“Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
