1、_ 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 and suitability for any particular use, including any patent infringement arising there
2、 from, 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 suggestions. Copyright 2010 SAE International All rights reserved. No part of this publication
3、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 DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-4970 (outside
4、USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AMS3678/9BAEROSPACEMATERIALSPECIFICATIONAMS3678/9 REV. B Issued 2004-11 Revised 2010-11Super
5、seding AMS3678/9AType 9 Virgin Polytetrafluoroethylene (PTFE) Moldings with Pigment for AS4716 and AS5857 Backup Rings RATIONALE This revision corrects the color code call outs for AS5857 applications. 1. SCOPE 1.1 Form This specification covers a polytetrafluoroethylene (PTFE) resin filled with ino
6、rganic pigment in the form of molded rods or tubes which are sintered after molding. The blue colored material is designated for use in rod glands only and the yellow colored material is designated for use in piston glands only. The brown colored material is designated for use in AS5857 rod glands o
7、nly and the green colored material is designated for use in AS5857 piston glands only. 1.2 Application These products are to be used as backup rings in AS4716 Glands for both static and dynamic applications and in AS5857 Glands for static applications where dimensional stability up to 450 F (232 C)
8、with good mechanical properties is required, but usage is need not be limited to such applications. Each application should be considered individually. 2. APPLICABLE DOCUMENTS See AMS3678. 3. TECHNICAL REQUIREMENTS 3.1 Basic Specification The complete requirements for procuring the products describe
9、d herein shall consist of this document and the latest issue of the basic specification, AMS3678. 3.2 Material All products shall be molded from virgin polytetrafluoroethylene (PTFE) powder conforming to ASTM D 4894, Type II or Type IV, and should contain 2% or less of inorganic pigment to provide a
10、 uniform color throughout the material. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS3678/9B Page 2 of 23.3 Properties The product shall conform to the requirements shown in Table 1. TABLE
11、1 - MATERIAL PROPERTY REQUIREMENTS Property Requirement Test Method 3.3.1 Tensile Strength, min 4500 psi (31.1 MPa) ASTM D 4894 3.3.2 Elongation, min 350% ASTM D 4894 3.3.3 Specific Gravity 2.14 to 2.20 ASTM D 792 3.3.4 Dimensional Stability 0.002 inch per 1 inch, max measured on circumference 4.5.3
12、.1 of AMS36783.3.5 Color Depends on pigment used, but color should be uniform throughout 3.4 Color Requirements For AS4716 rod applications the blue color shall be light blue and meet one of the following colors of FED-STD-595: 15526, 25526, or 35526. For AS4716 piston applications the yellow color
13、shall be bright yellow and meet one of the following colors of FED-STD-595: 13655, 23655, or 33655. For AS5857 rod applications the green color shall be medium green and meet one of the following colors of FED-STD-595: 14272, 24272, or 34272. For AS5857 piston applications the brown color shall be m
14、edium brown and meet one of the following colors of FED-STD-595: 10219, 20219, or 30219. 4. QUALITY ASSURANCE PROVISIONS See AMS3678. 5. PREPARATION FOR DELIVERY See AMS3678. 6. ACKNOWLEDGMENT See AMS3678. 7. REJECTIONS See AMS3678. 8. NOTES See AMS3678. PREPARED BY AMS COMMITTEE “P” Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
