1、AEROSPACE MATERIAL SPECIFICATION AMS3376 REV. C Issued 1985-07 Revised 2015-05 Superseding AMS3376B Sealing Compound, Non-Curing, Fluorosilicone Groove Injection Temperature and Fuel Resistant RATIONALE This is 5-yr review of AMS3376. Updated AS5502, AS5127, and AS5127/1 references; added PRI docume
2、nt references, and performed minor reformatting. No technical changes were incorporated in this update. 1. SCOPE 1.1 Form This specification covers a permanently mastic, non-curing fluorosilicone sealing compound in the form of a paste. 1.2 Application This product has been used typically for sealin
3、g or resealing integral fuel tanks designed for groove-injection type sealing for use from -65 to +360 F (-54 to +182 C), but usage is not limited to such applications. 1.3 Classification Sealing compounds covered by this specification are classified as follows: Class 1 - High viscosity, permanently
4、 mastic, fuel resistant, fluorosilicone paste compound suitable for sealing applications with structural mismatch of 0.005 inch (0.13 mm) or less, normally contains glass bead filler material. Class 2 - Medium viscosity, permanently mastic, fuel resistant, fluorosilicone paste compound suitable for
5、sealing applications with structural mismatch of 0.005 inch (0.13 mm) or less, normally contains glass bead filler material. Class 3 - High viscosity, permanently mastic, fuel resistant, fluorosilicone paste compound suitable for sealing applications with structural mismatch of 0.015 inch (0.38 mm)
6、or less, normally contains cured fluorosilicone rubber particles. 1.4 Safety - Hazardous Materials: Shall be in accordance with AS5502 (1.1) _ 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 thi
7、s report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefrom, 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, stabili
8、zed, or cancelled. SAE invites your written comments and suggestions. Copyright 2015 SAE International All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or oth
9、erwise, 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 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
10、 Report, please visit http:/www.sae.org/technical/standards/AMS3376C SAE INTERNATIONAL AMS3376C Page 2 of 17 2. APPLICABLE DOCUMENTS Shall be in accordance with AS5502 (Section 2). 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-
11、7323 (inside USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org. AMS2629 Fluid, Jet Reference AMS3167 Solvents, Wipe for Cleaning Prior to Application of Primer and Top Coat Materials or Sealing Compounds AMS3660 Polytetrafluoroethylene (PTFE) Moldings, General Purpose Grade, As Sintered
12、(Stabilized) AMS3819 Cloths, Cleaning for Aircraft Primary and Secondary Structural Surfaces AMS4035 Aluminum Alloy, Sheet and Plate, 4.4Cu - 1.5Mg - 0.60Mn (2024-0), Annealed; or when specified, “As Fabricated” (2024-F) AMS4045 Aluminum Alloy, Sheet and Plate, 5.6Zn - 2.5Mg - 1.6Cu - 0.23Cr 7075: (
13、-T6 Sheet, -T651 Plate), Solution and Precipitation Heat Treated AMS5070 Steel Bars and Forgings, 0.18 - 0.23C (SAE 1022) AMS5640 Steel, Corrosion-Resistant, Bars, Wire, and Forgings, 18Cr - 9.0Ni, Free MachiningAMS6370 Steel Bars, Forgings, and Rings, 0.95Cr - 0.20Mo -(0.28 - 0.33C) (SAE 4130) AMS-
14、C-27725 Coating, Corrosion Preventative, for Aircraft Integral Fuel Tanks for Use to 250 F (121 C) AS5127 Aerospace Standard Test Methods for Aerospace Sealants Methods for Preparing Aerospace Sealants Test Specimens AS5127/1 Aerospace Standard Test Methods for Aerospace Sealants, Two-Component Synt
15、hetic Rubber Compounds AS5502 Standard Requirements for Aerospace Sealants and Adhesion Promoters AS71051 Pipe Threads, Taper, Aeronautical National Form, Symbol ANPT Design and Inspection Standard AS8879 Screw Threads, UNJ Profile, Inch Controlled Radius Root with Increased Minor Diameter 2.2 ASTM
16、Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM D471 Standard Test Method for Rubber Property Effect of Liquids 2.3 PRI Publications Available from Performance Review Institute, 161 Thorn Hi
17、ll Road, Warrendale, PA 15086-7527, Tel: 724-772-1616, www.pri-network.org. PD-2000 Governance and Administration of an Industry Managed Product Qualification Program PD2001 Manufacturer Request for Product Approval and Qualification Process SAE INTERNATIONAL AMS3376C Page 3 of 17 PD2103 Aerospace Q
18、uality Assurance, Product Standards, Qualification Procedure, Sealants PRI-QPL-AMS3376 Products Qualified Under AMS3376 3. TECHNICAL REQUIREMENTS 3.1 Material Sealing compound shall be a permanently deformable, non-curing fluorosilicone product which does not contain solvents. Sealing compound shall
19、 exhibit no separation of components. Occluded gases shall not be permitted. 3.2 Date of Packaging Shall be in accordance with AS5502 (3.1). 3.3 Toxicological Formulations Shall be in accordance with AS5502 (3.2). 3.4 Shelf Life Shelf life shall be a minimum of 18 months from the date of packaging w
20、hen stored at 90 F (32 C) or lower. Material may be retested for shelf life extension per 4.3.3. 3.5 Quality Shall be in accordance with AS5502 (3.3). 3.6 Properties Sealing compound shall conform to the requirements shown in Table 1, determined in accordance with specified test methods. SAE INTERNA
21、TIONAL AMS3376C Page 4 of 17 Table 1 - Properties Paragraph Property Requirements Test Method 3.6.1 Nonvolatile Content, minimum 98% AS5127/1 (5.1) 3.6.2 Extrusion 4.5.4 Class 1 200 to 275 pounds force (890 to 1223 N) Class 2 100 to 200 pounds force (445 to 890 N) Class 3 250 to 350 pounds force (11
22、12 to 1557 N) 3.6.3 Corrosion Resistance The surface of the panel which was in contact with sealing compound shall have no more corrosion or severe discoloration than the uncoated panel. 4.5.5 3.6.4 Pressure Rupture, minimum 10 inches (254 mm) Hg 4.5.6 3.6.5 Fuel Resistance 4.5.7 3.6.5.1 Volume Chan
23、ge +5% to +35% 4.5.7.1 3.6.5.2 Weight Loss, maximum 6% 4.5.7.2 3.6.6 Liquid and Vapor Sealability No leaks or loss of pressurization 4.5.8 3.6.7 Reinjection Time, maximum 20 seconds 4.5.9 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection Shall be in accordance with AS5502 (4.1). 4.1.
24、1 Source inspection Shall be in accordance with AS5502 (4.1.1). 4.1.2 Sampling Shall be in accordance with AS5502 (4.3). 4.2 Classification of Tests Shall be in accordance with AS5502 (4.2). 4.2.1 Qualification Tests All technical requirements listed in Table 1 are qualification tests and shall be p
25、erformed on a production lot of the sealing compound prior to shipment to a purchaser, when a change in ingredients and/or processing requires reapproval, or when purchaser deems confirmatory testing to be required. 4.2.1.1 Qualification All products sold to this specification, shall be listed, or a
26、pproved for listing, on the qualified Products List, PRI-QPL-AMS3376. The qualified products list shall be in accordance with PD2000, PD2001, and PD2103. SAE INTERNATIONAL AMS3376C Page 5 of 17 4.2.2 Preproduction Tests Shall be in accordance with AS5502 (4.2.2). 4.2.3 Acceptance Tests Requirements
27、shown in Table 2 are acceptance tests and shall be performed on each lot per AS5502 (4.2.2.2). Table 2 Acceptance tests Test Requirement Paragraph Nonvolatile Content 3.6.1 Extrusion 3.6.2 Pressure Rupture 3.6.4 Fuel Resistance 3.6.5 4.3 Sampling and Testing Shall be in accordance with AS5502 (4.3).
28、 4.3.1 Acceptance Tests Shall be in accordance with AS5502 (4.3.1). Each lot shall be subjected to acceptance testing. Sufficient material for acceptance testing shall be packaged in the same type containers that are being procured. After packaging, test kits shall be selected at random for acceptan
29、ce testing. Acceptance testing is to be conducted on the final packaged product and consist of those tests outlined in 4.2.3. 4.3.2 Qualification Test Samples Sample lots shall be produced using production scaled equipment. Enough material shall be supplied to perform all required tests. Samples sha
30、ll be identified as specified herein and below: Sealing Compound, Non-Curing, Fluorosilicone Groove Injection, Temperature and Fuel Resistant AMS3376C Class MANUFACTURERS IDENTIFICATION LOT NUMBER DATE OF PACKAGING SHELF LIFE EXPIRATION DATE STORE BELOW 90 F (32 C) 4.3.3 Shelf Life Extensions 4.3.3.
31、1 Sampling Shall be in accordance with AS5502 (4.3). 4.3.3.2 Shelf Life Testing The testing to be conducted for shelf-life extensions are listed in Table 3. SAE INTERNATIONAL AMS3376C Page 6 of 17 Table 3 Shelf life testing Test Requirement Paragraph Nonvolatile Content 3.6.1 Extrusion 3.6.2 Pressur
32、e Rupture 3.6.4 Fuel Resistance 3.6.5 4.3.3.3 Time and Limits of Shelf Life Extensions If tests are being performed at the end of the stated shelf life to extend the shelf-life of the sealing compound, and all tests are passed, the shelf-life will be extended 9 months. Up to four extensions are perm
33、issible. 4.4 Approval Shall be in accordance with AS5502 (4.4). 4.5 Test Methods 4.5.1 Standard Conditions Standard laboratory conditions shall be as specified in AS5127 (Section 4). 4.5.2 Standard Tolerances Unless otherwise specified herein, standard tolerances of AS5127 (Section 3) “Standard Tole
34、rances” shall apply. 4.5.3 Standard Cleaning Unless otherwise specified herein, all test panels and jigs shall be cleaned using AMS3167 and AMS3819, Grade A, cleaning cloths. 4.5.4 Extrusion The extrusion plastometer shown in Figures 1 and 2 shall be packed with a hand rolled, cylindrically shaped m
35、ass of sealing compound about 0.75 inch (19 mm) in diameter and 2.25 to 2.50 inch (57.2 to 63.5 mm) long. Special precaution should be taken to avoid forming air pockets in the slug of sealing compound. Sufficient fingertip pressure shall be used to force the sealing compound into intimate contact w
36、ith the cylinder walls. The packed apparatus shall be stabilized for 24 hours at standard conditions (4.5.1). At the end of the stabilization period, insert the plastometer piston, center the assembly on the fixed base of a tensile machine, and load in compression at the constant rate of 0.100 0.002
37、 inch (2.54 0.05 mm) per minute. When the top of the piston is approximately 1.25 inches (31.8 mm) from the top of the plastometer cylinder, the maximum scale load which occurs during the ensuing 0.25 inch (6.4 mm) of piston travel shall be recorded. Clean the plastometer completely per 4.5.3 after
38、each trial. Repeat the test on the empty plastometer, measuring the scale load during the same piston travel location and the scale load obtained from the maximum scale loads obtained when the sealing compound was tested. The test shall be run in duplicate and the average of the results reported. In
39、dividual test results shall not deviate by more than 10% of the average value. SAE INTERNATIONAL AMS3376C Page 7 of 17 4.5.5 Corrosion Resistance Two AMS4045 panels approximately 0.040 x 2.75 x 6 inches (1.02 x 69.8 x 152 mm) in size shall be cleaned in accordance with AS5127 (6.2.1). Two parallel f
40、illets of sealing compound 0.06 inch (1.5 mm) thick by 0.75 inch (19 mm) wide by 5 inches (127 mm) long shall be applied to one side of one of the panels. That panel shall be set aside under standard conditions, lying horizontally with the sealing compound face up, for a minimum of 24 hours. Both pa
41、nels shall be immersed vertically for 20 days in a covered glass vessel containing a 2-layer liquid consisting of a 3% aqueous sodium chloride solution and AMS2629, Type I, jet reference fluid, so that 2 inches (51 mm) of the panels are exposed to the salt water, 2 inches (51 mm) are exposed to jet
42、reference fluid, and the remainder is exposed to air-vapor mixture. The temperature during the exposure shall be maintained at 140 F (60 C) for 20 days. Immediately upon removal from the liquid, the sealing compound shall be removed using a non-metallic scraper and the panels examined for evidence o
43、f corrosion. 4.5.6 Pressure Rupture Specimens constructed in accordance with Figure 3 and finished as listed in Table 4 shall be used. Pack the sealing compound into the specimens taking care to eliminate air bubbles and stabilize the specimens at standard conditions (4.5.1) for not less than 24 hou
44、rs. The specimens shall be cooled to below -20 F (-29 C) and any excess material beyond flush shall be trimmed from the surfaces with a razor blade. One of the specimens shall be mounted in the pressure rupture jig (Figure 3). One air hose bib of the apparatus shall be connected to a manometer, the
45、other to a variable pressure source. The assembly shall be immersed in a water bath at 77 F (25 C) and stabilized for 5 minutes. Starting at atmospheric pressure, the pressure on the apparatus shall be uniformly increased at the rate of 1 inch (25 mm) of mercury per 15 seconds until failure occurs.
46、A continuous stream of air bubbles observed to come from the specimen shall constitute a failure. The pressure applied at the time of failure shall be recorded. Test the other two specimens in the same manner. The average failure pressure of the three specimens shall be reported to the nearest 0.5 i
47、nch (13 mm) of mercury (Hg). Table 4 - Pressure rupture specimens (3 each required) 1. Sulfuric acid anodized in accordance with AS5127 (6.3). 2. Sulfuric acid anodized in accordance with AS5127 (6.3) and coated with AMS-C-725 corrosion preventive coating. Application, coating thickness, and curing
48、shall be in accordance with manufacturers recommendations. Care shall be taken to ensure a thin, even coat in the slot. 4.5.7 Fuel Resistance 4.5.7.1 Volume Change Six AMS4045 aluminum panels, approximately 0.040 x 1 x 2.50 inches (1.02 x 25 x 63.5 mm), shall be weighed accurately to the nearest mil
49、ligram in air (W1), and in water (W2). A pad of sealing compound 0.06 x 1 x 2 inches (1.5 x 25 x 51 mm) shall be applied to each panel. One-half inch (12.7 mm) at one end of each panel shall not be coated for handling purposes. The sealing compound coated panels shall then be weighed in air (W3) and in water (W4). The panels shall be cond
