ASTM_D_6412_-_D_6412M_-_99_2012.pdf

Designation:D6412/D6412M99(Reapproved 2012)Standard Specification ForEpoxy(Flexible)Adhesive For Bonding Metallic AndNonmetallic Materials1This standard is issued under the fixed designation D6412/D6412M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 The specification covers a two-part modified epoxypaste adhesive for bonding metallic and nonmetallic materials.The adhesive should be suitable for forming bonds that canwithstand environmental exposure to temperatures from 184to 82 C(300 to 180 F)when exposed to an expectedcombination of stress,temperature,and relative humidity to beencountered in service.NOTE1When coordinated through the Department of Defense(DoD)and the National Aeronautics and Space Administration(NASA),thispractice will be a direct replacement of MIL-A-82720(OS),MIS-26872,and MSFC-SPEC-2037.1.2 The values stated in SI units or inch-pound units are tobe regarded separately as standard.Within the text,theinch-pound units are shown in brackets.The values stated ineach system are not exact equivalents;therefore,each systemmust be used independently of the other.Combining valuesfrom the two systems may result in nonconformance with thisspecification.1.3 The following precautionary statement pertains to thetest method portion only,Section 8,of this specification:Thisstandard does not purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.2.Referenced Documents2.1 ASTM Standards:2A109/A109M Specification for Steel,Strip,Carbon(0.25Maximum Percent),Cold-RolledA167 Specification for Stainless and Heat-ResistingChromium-Nickel Steel Plate,Sheet,and StripB209 Specification for Aluminum and Aluminum-AlloySheet and PlateD907 Terminology of AdhesivesD1002 Test Method for Apparent Shear Strength of Single-Lap-Joint Adhesively Bonded Metal Specimens by Ten-sion Loading(Metal-to-Metal)D1876 Test Method for Peel Resistance of Adhesives(T-Peel Test)D2240 Test Method for Rubber PropertyDurometer Hard-nessD2393 Test Method for Viscosity of Epoxy Resins andRelated Components(Withdrawn 1992)3D2651 Guide for Preparation of Metal Surfaces forAdhesiveBondingD3951 Practice for Commercial PackagingD4142 Guide for Testing Epoxy ResinsE595 Test Method for Total Mass Loss and Collected Vola-tile Condensable Materials from Outgassing in a VacuumEnvironment2.2 National Aeronautics and Space Administration(NASA):4JSC Sp-R-0022 General Specification,Vacuum Stability Re-quirement of Polymeric Material for Spacecraft Applica-tionMSFC-HDBK-527/JSC-09604 Material Selection List forHardware SystemsGSFC RP 1124 Outgassing Data for Selecting SpacecraftMaterialsNOTE2Copies of specifications,standards,drawings and publicationsrequired by suppliers in connection with specific purchases should beobtained from the purchaser or as directed by his contracting officer.3.Terminology3.1 DefinitionsMany terms in this specification are de-fined in Terminology D907.3.2 Definitions of Terms Specific to This Standard:1This specification is under the jurisdiction of ASTM Committee D14 onAdhesives and is the direct responsibility of subcommittee D14.80 on MetalBonding Adhesives.Current edition approved Oct.1,2012.Published October 2012.Originallyapproved in 1999.Last previous edition approved in 2005 as D6412/D6412M-99(2005).DOI:10.1520/D6412_D6412M-99R12.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Unless otherwise indicated,copies of the above documents are available fromant NASA installation library or document repository.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2.1 epoxy-polyamide high viscosity adhesive,nan epoxypaste base(B)and a modified amide paste accelerator(A)when mixed in a proper ratio results in a viscous paste.3.2.2 epoxy-polyamide low viscosity adhesive,nan epoxyliquid base(B)and a modified amide liquid accelerator(A)when mixed in a proper ratio results in a viscous liquid.4.Significance and Use4.1 GeneralThis specification provides testing proceduresand specimen requirements to differentiate between the physi-cal and adhesive bonding properties of two types of epoxy-polyamide adhesive.5.Classification5.1 The epoxy-polyamide adhesive shall be furnished as oneof the following types:5.1.1 Type IConsists of two-part kits of Part B,base andPart A,acc