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/AMS3678/12AEROSPACEMATERIALSPECIFICATIONAMS3678/12 Issued 2010-11 Type 12 10% Mineral, 2.5%
5、Molybdenum Disulfide Filled Virgin Polytetrafluoroethylene (PTFE) Moldings or Extrusions RATIONALE This document addresses the specific properties of 10% mineral and 2.5% molybdenum disulfide filled virgin polytetrafluoroethylene. 1. SCOPE 1.1 Form This specification covers a polytetrafluoroethylene
6、 (PTFE) resin filled with 10% mineral and 2.5% molybdenum disulfide 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 typically for parts such as backup
7、rings and seal elements against softer stainless steels and aluminum in both static and dynamic applications requiring dimensional stability up to 450 F (232 C) and wear and extrusion resistance with good mechanical properties, but usage is not limited to such applications. Each application should b
8、e considered individually. 2. APPLICABLE DOCUMENTS See AMS3678. 3. TECHNICAL REQUIREMENTS 3.1 Basic Specification The complete requirements for procuring the products described herein shall consist of this document and the latest issue of the basic specification, AMS3678. Copyright SAE International
9、 Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS3678/12 Page 2 of 23.2 Material All products shall be molded or extruded from virgin polytetrafluoroethylene (PTFE) powder conforming to ASTM D 4894, Type II, Type III or
10、Type IV, uniformly blended with the specified fillers. The blended powder shall consist of 10% 2 mineral and 2.5% 0.5 molybdenum disulfide, and the remainder virgin PTFE powder, filler percentages measured by weight.3.2.1 Fillers 3.2.1.1 Mineral It is recommended that the mineral should be CaSiO3wit
11、h uniform particle size and excellent thermal stability 3.2.1.2 Molybdenum Disulfide It is recommended that a commercial grade of molybdenum disulfide is used with a particle size range of 1 to 100 m, median particle size of 30 m. 3.3 Properties The product shall conform to the requirements shown in
12、 Table 1. TABLE 1 - MATERIAL PROPERTY REQUIREMENTS Property Requirement Test Method 3.3.1 Tensile Strength, min 2800 psi (19.4 MPa) ASTM D 4745 3.3.2 Elongation, min 250% ASTM D 4745 3.3.3 Specific Gravity 2.22 to 2.34 ASTM D 792 3.3.4 Dimensional Stability 0.002 inch per 1 inch, max measured on cir
13、cumference 4.5.3.1 of AMS3678 3.3.5 Color Dark Gray to Black and 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-,-,-
