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 2012 SAE International All rights reserved. No part of this publication m
3、ay 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 U
4、SA) 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/AMS3217/2C AEROSPACE MATERIAL SPECIFICATION AMS3217/2 REV. C Issued 1983-07 Reaffirmed 2004-0
5、3 Revised 2012-04 Superseding AMS3217/2B Test Slabs, Acrylonitrile Butadiene (NBR-L) Low Acrylonitrile, 65 - 75 RATIONALE Paracril 1880 was discontinued by supplier. This change in availability required a change to specification and formulation of nitrile reference material. 1. SCOPE 1.1 Form This s
6、pecification covers a standard acrylonitrile butadiene (NBR-L) rubber stock with low acrylonitrile content in the form of molded test slabs. 1.2 Application See AMS3217. 2. APPLICABLE DOCUMENTS See AMS3217. 3. TECHNICAL REQUIREMENTS 3.1 Basic Specifications The complete requirements for test slabs d
7、escribed herein and their procurement shall consist of this document and the latest issue of the basic specification AMS3217. 3.2 Material Shall be a low-acrylonitrile butadiene (NBR-L) compounded to the formulation shown in Table 1. SAE AMS3217/2C Page 2 of 3 TABLE 1 - FORMULATION Ingredients NIST
8、SRM Number Parts Nipol N917or equivalent1- 100.0 (See 3.2.1) Zinc Oxide 370 5.0 (See 3.2.2) Stearic Acid 372 1.5 (See 3.2.2) Sulfur 371 1.5 (See 3.2.2) Sid Richardson N550 Carbon Black or equivalent1(See 3.2.3) - 60.0 (See 3.2.2) Altaxor equivalent1- 1.5 (See 3.2.2) Press Cure: 20 minutes 0.5 at 325
9、 F 5 (163 C 3) 1Equivalent ingredients must be approved by SAE Committee CE. 3.2.1 Weigh parts to the nearest 0.1 gram. 3.2.2 Weigh parts to the nearest 0.02 gram. 3.2.3 ASTM D 1765 designation. 3.3 Processing After the elastomer has banded on the rubber mill, the other ingredients shall be added in
10、 the order listed in Table 1. 3.3.1 The stock shall not be allowed to become hotter than can be handled with the bare hands; it is recommended that the stock be removed from the mill and cooled to room temperature before incorporating the final ingredient. 3.3.2 After all ingredients have been incor
11、porated and the stock has been thoroughly milled, the stock shall be passed 10 times through a tight mill. 3.3.3 Suitable preforms shall be cut from the freshly milled stock and molded into test slabs as specified in ASTM D 3182, Figure 1. 3.4 Properties Shall be as shown in Table 2. SAE AMS3217/2C
12、Page 3 of 3 TABLE 2 - PROPERTIES Paragraph Property Requirement Test Method 3.4.1 Hardness, Durometer “A” or equivalent 70 5 3.4.2 Tensile Strength, minimum 2800 psi (19.3 MPa) ASTM D 412, ASTM D 2240 3.4.3 Elongation, minimum 275% ASTM D 412 ASTM D 2240 3.4.4 Specific Gravity 1.19 0.01 ASTM D 471 3
13、.4.5 Synthetic Lubricant Immersion: AMS3021 158 F 5 (70 C 3) 3.4.5.1 Volume Change +62 to +70% 70 hours 0.5 4. QUALITY ASSURANCE PROVISIONS See AMS3217. 5. PREPARATION FOR DELIVERY See AMS3217. 6. ACKNOWLEDGMENT See AMS3217. 7. REJECTIONS See AMS3217. 8. NOTES See AMS3217. PREPARED BY AMS COMMITTEE “CE”
