1、SAESAESEALING COMPOUND, LOW ADHESION, CORROSION INHIBITING9,000 to 14,000 Poises (900 to 1400 Pas 1/2 Hour Application Time (B-1/2).AMS 3267/2AIssued 1 APR 1984Revised 1 APR 1992Superseding AMS 3267/2AEROSPACEMATERIALSPECIFICATIONSAESAEThe Engineering SocietyFor Advancing MobilityLand Sea Air and Sp
2、ace400 Commonwealth Drive, Warrendale, PA 15096-0001INTERNATIONALAn AmericanNationalStandardSAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineeringsciences. The use of this report is entirely voluntary, and its applicabilit
3、y and suitability for any particular use, including any patentinfringement 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 reaffirmed, revised, or cancelled. SAE invites yourwritten comments and suggestion
4、s.Copyright 1992 Society of Automotive Engineers, Inc.All rights reserved. Printed In U.S.A.91 -0942/ EG1. SCOPE:1.1 Form:This specification covers accelerated curing synthetic rubber compounds withcorrosion inhibitors and low adhesive strength supplied as a two-componentsystem.1.2 Application:This
5、product has been used typically for sealing aircraft access doors andaccessories where gaskets are required, but usage is not limited to suchapplications. Compound is classified as a B-1/2 sealing compound; thecompound being suitable for application by an extrusion gun or spatula with aminimum appli
6、cation time of 1/2 hour after mixing.2. APPLICABLE DOCUMENTS:See AMS 3267.3. TECHNICAL REQUIREMENTS:3.1 Basic Specification:The complete requirements for procuring the sealing compound described hereinshall consist of this document and the latest issue of the basicspecification, AMS 3267.3.2 Propert
7、ies:Compound, mixed in accordance with manufacturers instructions and cured asspecified in the basic specification, shall conform to the followingrequirements, determined in accordance with test methods listed in AMS 3267and Table 1.SAE AMS 3267/2AAMS 3267/2ATABLE 1 - PropertiesParagraph Property Re
8、quirement3.2.1 Color3.2.1.1 Base Compound3.2.1.2 After Curing3.2.2 Specific Gravity, maximum3.2.3 Nonvolatile Content, minimum3.2.4 Viscosity of Base Compound(See 4.2)3.2.5 Flow (See 4.3)3.2.6 Application Time(See 4.4)3.2.7 Tack-Free Time, maximum3.2.8 Hardness (cure time to attain30 Durometer “A“),
9、 minimum3.2.9 Peel Adhesion3.2.10 Resistance to Heat3.2.11 Resistance to Salt Water andHydrocarbons3.2.12 Weight Loss, maximum,And Flexibility3.2.13 Low-Temperature Flexibility3.2.14 Accelerated Storage Stability3.2.14.1 Application Time, minimumReddishReddish1.6592% by weight9,000 to 14,000 poises(
10、900 to 1400 Pa.s)0.1 to 0.75 inch (2.5 to 19.0 mm)1/2 hour after the beginning ofmixing, 15 grams per minute, minimum,shall be extruded.10 hours, measured from the beginningof mixing24 hours4 pounds force per inch (700 N/m)width, maximum; 98% adhesive failure,minimumNo visual evidence of softening,s
11、ponging, blistering, checking,cracking, shrinkage, or powderingNo visual evidence of softening,blistering, or evidence ofcorrosion8% weight lossNo cracking when bentNo visual evidence of cracking orchecking1/2 hour, measured from the beginningof mixing- 2 -SAE AMS 3267/2AAMS 3267/2ATABLE 1 - Propert
12、ies (Continued)Paragraph Property Requirement3.2.14.2 Tack-Free Time, maximum3.2.14.3 Viscosity of Base Compound3.2.15 Soluble Chromate Content,minimum10 hours, measured from the beginningof mixing9,000 to 14,000 poises(900 to 1400 Pa.s)2.5% by weight4. QUALITY ASSURANCE PROVISIONS:See AMS 3267 and
13、the following:4.1 Application of Sealing Compound:Unless otherwise specified herein, test panels shall be given an applicationof sealing compound to produce a coating having a thickness of 1/8 inch 1/64 (3.2 mm 0.4) when cured.4.2 Viscosity of Base Compound:Shall be determined with the base compound
14、 placed in a 1 quart (1 L) can.The can shall be filled with base compound to within 1/2 inch (13 mm) of thetop, covered, and stored at 25 C 1 (77 F 2) for not less than eighthours. The base compound shall then be thoroughly mixed by stirring slowlyfor three minutes after which the can shall be close
15、d and the base compoundallowed to stand for one hour. The Brookfield Model RVF viscosimeter withNo. 7 spindle at 2 rpm, or equivalent, shall be used and the readingsobtained converted to poises. The highest reading shall be taken after theinstrument has run in the compound for one minute.- 3 -SAE AM
16、S 3267/2AAMS 3267/2A4.3 Flow:(R)A standard Semco sealant gun cartridge, or equivalent, fitted with a nozzle,shall be filled with freshly mixed sealing compound. The gun and sealingcompound shall be maintained at standard conditions throughout the test. Thetest shall be conducted with a flow-test jig
17、 as shown in Figure 1. Depth ofplunger tolerance is critical and shall be controlled within the toleranceduring all tests. The flow-test jig shall be placed on a table with thefront face upward and the plunger depressed to the limit of its travel.Within 15 minutes after the beginning of mixing, enou
18、gh of the mixed sealingcompound shall be extruded from the application gun to fill the recessedcavity of the jig and leveled off even with the block. The test at thisinterval shall be considered the initial flow of the sealing compound.Within 10 seconds after the leveling operation, the jig shall be
19、 placedupright on its end and the plunger immediately advanced to the limit of itsforward travel. The flow measurement shall be taken 30 minutes after thesealing compound has been applied to the test jig. The flow shall bemeasured from tangent to the lower edge of the plunger to the furthest pointto
20、 which flow has advanced. As the sealing compound progresses in itsapplication time, the flow-test shall be repeated 90 minutes after the end ofmixing.4.4 Application Time:The base compound, accelerator, and application gun shall be stabilized atstandard conditions for not less than eight hours befo
21、re not less than 250grams of base compound is mixed with the proper amount of accelerator. Themixed sealing compound shall be promptly used to fill a standard Semcosealing compound gun cartridge, or equivalent, having a Semco 440 nozzle withan orifice diameter of 0.125 inch 0.005 (3.18 mm 0.13). The
22、 gun andsealing compound shall be maintained at standard conditions throughout thetest. The gun shall be attached to a constant air supply of 90 psi 5(621 kPa 34). From 2 to 3 inches (51 to 76 mm) of sealing compound shallbe extruded initially to clear trapped air. At the end of 1/2 hour, measuredfr
23、om the beginning of the mixing period, the sealing compound shall beextruded onto a suitable receptacle for one minute and the amount of extrudedsealing compound determined.5. PREPARATION FOR DELIVERY:See AMS 3267.6. ACKNOWLEDGMENT:See AMS 3267.7. REJECTIONS:See AMS 3267.8. NOTES:See AMS 3267.- 4 -SAE AMS 3267/2AAMS 3267/2AMATERIAL: Aluminum AlloyDIMENSIONS IN INCHES (MILLIMETERS).TOLERANCES: DECIMALS 0.016 INCH ( 0.41 mm)FIGURE 1. Flow-test jig.- 5 -
