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 revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2015 SAE International All rights reserved. No part of this p
3、ublication 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: +1 724-776-497
4、0 (outside 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/AMS3217/3C AEROSPACE MATERIAL SPECIFICATION AMS3217/3 REV. C Issued 1983-07 Reaff
5、irmed 2003-11 Revised 2015-08 Superseding AMS3217/3B Test Slabs, Chloroprene (CR) 70 - 80 RATIONALE AMS3217/3B is now due for revision. Properties in Table 2 have been revised to reflect discontinuation of M2V synthetic lubricant, replacement with IRM 901 reference oil, and material property values.
6、 ASTM test methods for testing properties are cited. Equivalent ingredients for Table 1 changes must be approved by SAE AMS CE Committee. 1. SCOPE 1.1 Form This specification covers a standard chloroprene (CR) rubber stock in the form of molded test slabs. 1.2 Application See AMS3217. 2. APPLICABLE
7、DOCUMENTS See AMS3217. 3. TECHNICAL REQUIREMENTS 3.1 Basic Specifications The complete requirements for test slabs described herein and their procurement shall consist of this document and the latest issue of the basic specification AMS3217. 3.2 Material Shall be a chloroprene (CR) compounded to the
8、 formulation shown in Table 1. SAE INTERNATIONAL AMS3217/3C Page 2 of 3 Table 1 Formulation Ingredients NIST SRM Number Parts Neoprene WRT- 100.0 (See 3.2.1) Maglite Dor equivalent1- 2.0 (See 3.2.2) Stearic Acid 372 0.5 (See 3.2.2) Agerite Stalite Sor equivalent1- 2.0 (See 3.2.2) Zinc Oxide 370 5.0
9、(See 3.2.2) Sid Richardson N550 Carbon Black or equivalent1ASTM D1765, N550 Classification - 50.0 (See 3.2.1) Thiate-Uor equivalent1- 0.7 (See 3.2.2) Press Cure: 20 minutes 0.5 at 311 F 5 (155 C 3). 1Equivalent ingredients must be approved by SAE Committee CE. 3.2.1 Weigh parts to the nearest 0.1 gr
10、am (See Table 1). 3.2.2 Weigh parts to the nearest 0.02 gram (See Table 1). 3.3 Processing After the elastomer has banded on the rubber mill, the other ingredients shall be added in 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 h
11、ands; 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 incorporated and the stock has been thoroughly milled, the stock shall be passed 10 times through a tight mill. 3.3.3 Suitab
12、le preforms shall be cut from the freshly milled stock and molded into test slabs as specified in ASTM D3182, Figure 1. 3.4 Properties Shall be as shown in Table 2. Table 2 Properties Paragraph Property Requirement Test Method 3.4.1 Hardness, Durometer “A” or equivalent 75 5 ASTM D2240 3.4.2 Tensile
13、 Strength, minimum 2750 psi ( 19.0 MPa) ASTM D412 3.4.3 Elongation, minimum 200 % ASTM D412 3.4.4 Specific Gravity 1.42 0.02 ASTM D297 Hydrostatic Method 3.4.5 Synthetic Lubricant Immersion IRM 901 ASTM D471 248 F 5 (120 C 3) 3.4.5.1 Volume Change + 5 to +15% 70 hours 0.5 SAE INTERNATIONAL AMS3217/3
14、C Page 3 of 3 4. QUALITY ASSURANCE PROVISIONS See AMS3217. 5. PREPARATION FOR DELIVERY See AMS3217. 6. ACKNOWLEDGMENT See AMS3217. 7. REJECTIONS See AMS3217. 8. NOTES See AMS3217. 8.1 A change bar (l) located in the left margin is for the convenience of the user in locating areas where technical rev
15、isions, not editorial changes, have been made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. PREPARED BY AMS COMMITTEE “CE”
