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/AMS3678/14AEROSPACEMATERIALSPECIFICATIONAMS3678/14 Issued 2010-11Type 14 40% Bronze Filled V
5、irgin Polytetrafluoroethylene (PTFE) Moldings or Extrusions RATIONALE This document addresses the specific properties of 40% bronze filled virgin polytetrafluoroethylene. 1. SCOPE 1.1 Form This specification covers a polytetrafluoroethylene (PTFE) resin filled with 40% bronze powder in the form of e
6、xtruded 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 typically for bearing and wear ring applications in a lubricated environment against steel, stainless steel, and chromi
7、um plate, and requiring dimensional stability up to 450 F (232 C) with good mechanical properties, 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 re
8、quirements for 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, unifo
9、rmly blended with the specified filler. The blended powder shall consist of 40% 2 bronze powder and the remainder virgin PTFE powder. The filler percentage is measured by weight. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted w
10、ithout license from IHS-,-,-SAE AMS3678/14 Page 2 of 23.2.1 Filler It is recommended that a commercial grade (90/10 : Cu/Sn) of irregular shaped bronze powder with a particle size of less than 60 m be used. 3.3 Properties The product shall conform to the requirements shown in Table 1. TABLE 1 - MATE
11、RIAL PROPERTY REQUIREMENTS Property Requirement Test Method 3.3.1 Tensile Strength, min 2795 psi (19 MPa) ASTM D 4745 3.3.2 Elongation, min 200% ASTM D 4745 3.3.3 Specific Gravity 3.04 to 3.14 ASTM D 792 3.3.4 Dimensional Stability 0.002 inch per 1 inch, max measured on circumference 4.5.3.1 of AMS3
12、678 3.3.5 Color Brown to bronze color should be uniform throughout 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-,-,-
