SAE AMS 3276G-2016 Sealing Compound Integral Fuel Tanks and General Purpose Intermittent Use to 360 (182 .pdf

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1、_ 6$(7HFKQLFDO6WDQGDUGV%RDUG5XOHVSURYLGHWKDW7KLVUHSR rt 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 therefrom, is

2、the sole UHVSRQVLELOLWRIWKHXVHU 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 2016 SAE International All rights reserved. No part of this publication may

3、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 USA)

4、 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:/standards.sae.org/AMS3276G AEROSPACE MATERIAL SPECIFICATION AMS3276 REV. G Issued 1993-10 Revised 2016-10 Superseding AMS3276F S

5、ealing Compound, Integral Fuel Tanks and General Purpose, Intermittent Use to 360 F (182 C) RATIONALE Paragraph 3.6.22.5 should be 72 hours at Standard Conditions in AMS3021 per AMS3276, Revision C. Reformatting of Table 1 was performed. 1. SCOPE 1.1 Form This specification covers fuel-resistant pol

6、ysulfide (T) sealing compounds supplied as a two-component system. 1.2 Application This sealing compound has been used typically for fuel tank sealing, cabin pressure sealing, and aerodynamic smoothing, but usage is not limited to such applications. It can be used for faying surface sealing, wet-ins

7、tallation of fasteners, overcoating fasteners, sealing joints and seams, and nonstructural adhesive bonding. This room-temperature curing sealing compound can be used in fuel areas as well as nonfuel areas. Curing of this material can be accelerated at higher temperatures. This material is usable fr

8、om -65 to 250 F (-54 to 121 C), with short-term exposure (approximately six hours) to 360 F (182 C). AMS3100 adhesion promoter may be applied prior to application of the sealant in accordance with recommendations from the sealant manufacturer for specific substrates. 1.3 Classification Sealing compo

9、unds covered by this specification are classified as follows: SAE INTERNATIONAL AMS3276G Page 2 of 18 1.3.1 Classes Class A - Suitable for application by brush. Available with the following application times in hours: A-1/2 A-2 A-4 Class B - Suitable for application by extrusion gun or spatula. Used

10、 primarily for fillet sealing, injection sealing, prepack sealing, and rework of damaged fillet seals. Available with the following application times in hours: B-1/4 B-1/2 B-1 B-2 B-4 B-6 B-12 Class C - Suitable for application by brush, extrusion gun, roller or spatula. Used mostly for fay surface

11、sealing and wet installation of fasteners. Available with the following application times in hours: Notation: ( ) Assembly time in hours C-1/2(1/2) C-2(2) C-8(20) Class D - Suitable for application by extrusion gun or spatula. Used for hole and void filling, or for other applications where a very th

12、ick sealant is required. Available with the following application times in hours: D-1/4 D-1/2 Class E - Suitable for application by automatic riveting equipment. Available with the following application time in hours: E-6 1.4 Safety - Hazardous Materials Shall be in accordance with AS5502 (1.1). 2.

13、APPLICABLE DOCUMENTS Shall be in accordance with AS5502 (2). 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org. AMS2629 Fluid, Jet Reference AMS3020 2LO5HIH

14、UHQFHIRU/ Stock Rubber Testing AMS3021 Fluid, Reference for Testing Di-Ester (Polyol) Resistant Material AMS3100 Adhesion Promoter For Polysulfide Sealing Compounds SAE INTERNATIONAL AMS3276G Page 3 of 18 AMS4045 Aluminum Alloy Sheet and Plate 5.6Zn - 2.5Mg - 1.6Cu - 0.23Cr 7075: (-T6 Sheet, -T651 P

15、late) Solution and Precipitation Heat Treated AMS4911 Titanium Alloy, Sheet, Strip, and Plate 6Al - 4V Annealed AMS5516 Steel, Corrosion-Resistant, Sheet, Strip, and Plate 18Cr - 9.0Ni (SAE 30302) Solution Heat Treated AMS-C-27725 Coating, Corrosion Preventative, for Aircraft Integral Fuel Tanks for

16、 Use to 250 F (121 C) AS5127 Aerospace Standard Test Methods for Aerospace Sealants Methods for Preparing Aerospace Sealant Test Specimens AS5127/1 Aerospace Standard Test Methods for Aerospace Sealants Two-Component Synthetic Rubber Compounds AS5502 Standard Requirements for Aerospace Sealants and

17、Adhesion Promoters 2.2 U.S. Government Publications Copies of these documents are available online at http:/quicksearch.dla.mil. MIL-PRF-23377 Primer Coatings: Epoxy, High Solids MIL-PRF-85285 Coating, Polyurethane, Aircraft and Support Equipment MIL-PRF-85582 Primer Coatings, Epoxy, Waterborne 2.3

18、PRI Publications Available from Performance Review Institute, 161 Thorn Hill Road, Warrendale, PA 15086-7527, Tel: 724-772-1616, www.pri-network.org. PD2103 Aerospace Quality Assurance, Product Standards, Qualification Procedure, Sealants PRI-QPL-AMS-3276 Products Qualified Under AMS3276 3. TECHNICA

19、L REQUIREMENTS 3.1 Materials The basic ingredient shall be synthetic rubber, made from a polysulfide compound. The sealing compound shall cure by addition of a separate curing agent to the base compound and shall not depend on solvent evaporation for curing. The material shall contain no lead compou

20、nds. The curing agent shall possess sufficient color contrast to base compounds to permit easy identification of an unmixed or incompletely mixed sealing compound. Neither the base compound nor the cured sealant shall be red or pink in color. 3.2 Date of Packaging Shall be in accordance with AS5502

21、(3.1). 3.3 Toxicological Formulations Shall be in accordance with AS5502 (3.2). 3.4 Quality Shall be in accordance with AS5502 (3.3). SAE INTERNATIONAL AMS3276G Page 4 of 18 3.5 Shelf Life Shelf life shall be a minimum of 9 months from the date of packaging when stored below 80 F. Material may be re

22、tested for shelf life extension per 4.3.3. 3.5.1 Premixed and Frozen Material Premixed and frozen material shall have a minimum storage life of 30 days at -40 F (-40 C) or lower, or 10 days at -10 F (-23 C) or lower from date of mix/freeze. Recommendations for longer storage lives at lower temperatu

23、res may be provided by the manufacturer. The date of mix/freeze shall be within the shelf life of the unmixed material. 3.6 Properties The base compound and the curing agent, when mixed in accordance with manufacturers instructions and cured in accordance with 4.5.4.5, shall conform to all requireme

24、nts shown in Table 1 when determined in accordance with the specified test methods. SAE INTERNATIONAL AMS3276G Page 5 of 18 Table 1 - Properties Paragraph Property Requirement Test Procedures (Paragraph) 3.6.1 Nonvolatile Content, by weight, min. AS5127/1 (5.1) Class A 85% Class B 96% Class C 92% Cl

25、ass D 97% Class E 85% 3.6.2 Viscosity of Base Compound AS5127/1 (5.3) Class A (Use No. 6 spindle 10 rpm) 100 to 600 poise WR3DV Class B (Use No. 7 spindle 2 rpm) 9000 to 16000 poise WR3DV Class C (Use No. 6 spindle 2 rpm) 1000 to 4000 poise WR3DV Class D (Use No. 7 spindle 2 rpm) 20000 to 30000 pois

26、e WR3DV Class E (Use No. 7 spindle 10 rpm) 300 to 800 poise WR3DV 3.6.3 Flow Class B 0.75 inch (19.0 mm), max. AS5127/1 (5.5) AS5127/1 (5.5.1) Class C 0.010 inch (0.25 mm), min. AS5127/1 (5.5.2) Class D 0.20 inch (5.1 mm), max. AS5127/1 (5.5.1) 3.6.4 Application Time, min. Class A - From the beginni

27、ng of mixing to the end of the application time, the viscosity shall not exceed 2500 poise 3DV (Use No. 7 spindle 10 rpm) Class A-1/2 Class A-2 Class A-4 1/2 hour 2 hours 4 hours AS5127/1 (5.6) AS5127/1 (5.6.1) Class B - From the beginning of mixing to the end of the application time, not less than

28、15 grams per minute shall be extruded. Class B-1/4 Class B-1/2 Class B-1 Class B-2 Class B-4 Class B-6 Class B-12 1/4 hour 1/2 hour 1 hour 2 hours 4 hours 6 hours 12 hours AS5127/1 (5.6.2) SAE INTERNATIONAL AMS3276G Page 6 of 18 Table 1 - Properties (continued) Paragraph Property Requirement Test Pr

29、ocedures (Paragraph) FRQW Class C - From the beginning of mixing to the end of the application time, not less than 30 grams per minute shall be extruded Class C-1/2(1/2) Class C-2(2) Class C-8(20) 1/2 hour 2 hours 8 hours AS5127/1 (5.6.2) Class D - From the beginning of mixing to the end of the appl

30、ication time, not less than 15 grams per minute shall be extruded. Class D-1/4 Class D-1/2 1/4 hour 1/2 hour AS5127/1 (5.6.2) Class E - From the beginning of mixing to the end of the application time, the viscosity shall be between 800 to 1100 poise (80 WR3DV (Use No. 7 spindle 10 rpm) Class E-6 6 h

31、ours AS5127/1 (5.6.2) 3.6.5 Assembly Time (Class C only) Class C-1/2(1/2) Class C-2(2) Class C-8(20) 1/2 hour 2 hours 20 hours AS5127/1 (5.7) 3.6.6 Tack-Free Time (Measured from beginning of mixing), max. AS5127/1 (5.8) Class A-1/2 10 hours Class A-2 24 hours Class A-4 36 hours Class B-1/4 6 hours C

32、lass B-1/2 10 hours Class B-1 12 hours Class B-2 (see Notes 1 and 2) 24 hours Class B-4 36 hours Class B-6 48 hours Class B-12 120 hours Class C-1/2(1/2) 10 hours Class C-2(2) 24 hours Class C-8(20) 96 hours Class D-1/4 6 hours Class D-1/2 10 hours Class E-6 120 hours SAE INTERNATIONAL AMS3276G Page

33、 7 of 18 Table 1 - Properties (continued) Paragraph Property Requirement Test Procedures (Paragraph) 3.6.7 Standard Cure Time (time to reach 30 Durometer Type A), max. AS5127/1 (5.9) Class A-1/2 30 hours Class A-2 72 hours Class A-4 90 hours Class B-1/4 16 hours Class B-1/2 30 hours Class B-1 36 hou

34、rs Class B-2 72 hours Class B-4 90 hours Class B-6 120 hours Class B-12 240 hours Class C-1/2(1/2) 30 hours Class C-2(2) 72 hours Class C-8(20) 336 hours Class D-1/4 16 hours Class D-1/2 30 hours Class E-6 240 hours 3.6.8 Fluid Immersion Cure Time, min (Classes A-1/2, B-1/4, B-1/2 only) After 48 hou

35、rs After 120 hours 25 Durometer Type A 35 Durometer Type A AS5127/1 (5.11) 3.6.9 Specific Gravity, max. average 1.65 AS5127/1 (6.1) 3.6.10 14-Day Hardness, min. (Classes B-12, C-8 (20), and E-6 are excluded) 40 Durometer Type A AS5127/1 (6.2) 3.6.11 Resistance to Thermal Expansion Sealant flush with

36、 groove within +0.010 and -0.050 inch (+0.25 and -1.3 mm) at the wide end of the test block and within +0.005 and -0.050 inch (+0.13 and -1.3 mm) at the narrow end. AS5127/1 (6.4) 3.6.12 Heat Reversion Resistance (Classes B, C and E only) The sealant shall not revert to a liquid or paste-like consis

37、tency, nor shall it become brittle or lose adhesion. AS5127/1 (6.5) 3.6.13 Hydrolytic Stability, min. 30 Durometer Type A AS5127/1 (6.6) 3.6.14 Shaving and Sanding (Class B only) No rolling or tearing of the sealant, smooth finish AS5127/1 (6.7) SAE INTERNATIONAL AMS3276G Page 8 of 18 Table 1 - Prop

38、erties (continued) Paragraph Property Requirement Test Procedures (Paragraph) 3.6.15 Paintability No separation from sealant AS5127/1 (6.8) 3.6.16 Weathering No cracking, chalking, peeling or loss of adhesion AS5127/1 (6.9) 3.6.17 Chalking Slight AS5127/1 (7.1) 3.6.18 Resistance to Thermal Rupture,

39、max. (Class A and B only), Oven air aging at 300 F (149 C), 10 psi (69 kPa), 30 minutes 0.156 inch (3.96 mm) No blistering or sponging AMS3276 (4.6.1) and AS5127/1 (7.2) 3.6.19 Weight Loss 2 panels in AMS2629 Type 1 / 3% saltwater; all at 140 F (60 C) for 7 days 20 lbf/inch (3503 N/m), 100% cohesive

40、 failure SAE INTERNATIONAL AMS3276G Page 10 of 18 Table 1 - Properties (continued) Paragraph Property Requirement Test Procedures (Paragraph) 3.6.28.2 Long Term Storage AMS3276 (4.6.5) Application Time Same as 3.6.4 Tack-Free Time (Measured from beginning of mixing), max. Class A-1/2 20 hours Class

41、A-2 48 hours Class A-4 72 hours Class B-1/4 16 hours Class B-1/2 20 hours Class B-1 24 hours Class B-2 48 hours Class B-4 72 hours Class B-6 96 hours Class B-12 180 hours Class C-1/2(1/2) 20 hours Class C-2(2) 48 hours Class C-8(20) 144 hours Class D-1/4 16 hours Class D-1/2 20 hours Class E-6 180 h

42、ours Standard Cure Time (time to reach 30 Durometer Type A), max. Class A-1/2 40 hours Class A-2 72 hours Class A-4 114 hours Class B-1/4 24 hours Class B-1/2 40 hours Class B-1 54 hours Class B-2 72 hours Class B-4 114 hours Class B-6 144 hours Class B-12 264 hours Class C-1/2(1/2) 40 hours Class C

43、-2(2) 72 hours Class C-8(20) 360 hours Class D-1/4 24 hours Class D-1/2 40 hours Class E-6 144 hours 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection Shall be in accordance with AS5502 (4.1). 4.1.1 Source Inspection Shall be in accordance with AS5502 (4.1.1). 4.1.2 Sampling and Test

44、ing Shall be in accordance with AS5502 (4.3). SAE INTERNATIONAL AMS3276G Page 11 of 18 4.2 Classification of Tests Shall be in accordance with AS5502 (4.2). 4.2.1 Qualification Tests Shall be in accordance with AS5502 (4.2.1). 4.2.1.1 Qualification Requirements for Class B-2 Class B-2 shall be the f

45、irst material that is qualified for each supplier of sealing compound. Class B-2 sealing compound shall be tested for, and shall meet all technical requirements of this specification with the exception of requirements unique to other classes or application times of the sealing compound. 4.2.1.2 Qual

46、ification Requirements for Other Classes and Application Times Once qualification for Class B-2 has been obtained, other classes of the sealing compound and additional application times of qualified classes may be qualified. The formulation for other classes, and for other application times of quali

47、fied classes, shall be the same as Class B-2, except for minor variations necessary for conformance to viscosity and application time requirements. All compounds shall meet all technical requirements of this specification. Other classes of the sealing compound need only to be tested to the initial acceptance tests listed in Table 2, plus all peel strength tests listed in Table 5, or as defined by the QPL agency. Application times of qualified classes need only to be tested to the initial acceptance WHVWVOLVWHG