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/AMS3678/4AAEROSPACEMATERIALSPECIFICATIONAMS3678/4 REV. A Issued 1999-03 Reaffirmed 2006-06Re
5、vised 2010-11 Superseding AMS3678/4 Type 4 25% Glass Filled Virgin Polytetrafluoroethylene (PTFE) Moldings or Extrusions RATIONALE This document is being revised to clear up some editorial issues and to maintain the same revision date for AMS3678 and all the accompanying slash sheets. 1. SCOPE 1.1 F
6、orm This specification covers a polytetrafluoroethylene (PTFE) resin filled with 25% glass fiber in the form of extruded or molded rods or tubes which are sintered after molding or, in the case of extrusions, sintered during the extrusion process. 1.2 Application These products have been used typica
7、lly for dynamic seal components requiring dimensional stability up to 450 F (232 C), but usage is not 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
8、 procuring the products described herein shall consist of this document and the latest issue of the basic specification, AMS3678. 3.2 Material All products shall be molded or extruded from virgin polytetrafluoroethylene (PTFE) powder conforming to ASTM D 4894, Type II or Type IV, uniformly blended w
9、ith the specified filler. The blended powder shall consist of 25% 2 milled glass fibers and the remainder virgin PTFE powder, filler percentage measured by weight. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license
10、from IHS-,-,-SAE AMS3678/4A Page 2 of 23.2.1 Filler It is recommended that the milled glass fiber should be E-glass produced through a 14 micron die, then hammer milled, and finally passed through a 0.032 inch screen. 3.3 Properties The product shall conform to the requirements shown in Table 1. TAB
11、LE 1 - MATERIAL PROPERTY REQUIREMENTS Property Requirement Test Method 3.3.1 Tensile Strength, min 1800 psi (12.4 MPa) ASTM D 4745 3.3.2 Elongation, min 180% ASTM D 4745 3.3.3 Specific Gravity 2.15 to 2.26 ASTM D 792 3.3.4 Dimensional Stability 0.002 inch per 1 inch, max measured on circumference 4.
12、5.3.1 of AMS36783.3.5 Color Off White to Dark Gray 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-,-,-
