ASTM E1794-21

Standard Specification for Adhesive for Bonding Foam Cored Sandwich Panels (200 °F Elevated Humidity Service), Type II Panels

ABSTRACT
This specification covers two-part adhesives for bonding aluminum alloy facing to foam core, inserts, edge attachments, and other components of a Type II foam cored sandwich panels. The adhesive should be suitable for forming bonds that can withstand long-term exposure at specified temperatures, and different combinations of stress, temperature, and humidity expected to be encountered in service. The adhesive may be used for new production or depot maintenance. The adhesive shall be a two-part thermosetting epoxy paste containing no asbestos and, when tested, shall meet the following physical and mechanical property requirements: curing time, temperature, and pressure; mix ratio; storage life; adhesive life; room-, low-, and high-temperature shear; hot humidity exposure shear; and room-temperature salt spray exposure shear.
SIGNIFICANCE AND USE
5.1 This specification is intended to provide information on the properties of adhesives, and the test methods required to evaluate adhesives to be used in the production bonding of aluminum alloys to foam core materials for the manufacture of tactical shelters.
SCOPE
1.1 This specification covers two-part adhesives for bonding foam core sandwich panels. The adhesive may be used for new production or depot maintenance. The adhesive should be suitable for forming bonds that can withstand long-term exposure to temperatures from −55 °C to 93 °C (−67 °F to 200 °F) and also withstand combinations of stress, temperature, and humidity expected to be encountered in service. The adhesives shall be used for bonding aluminum alloy facing to foam core, inserts, internal aluminum framing members, and other components of a foam cored sandwich panel.  
1.2 The values stated in SI units are to be regarded as the standard where only SI units are given or where SI units are given first followed by inch-pound units; where inch-pound units are given first followed by SI units, the inch-pound units are to be regarded as the standard.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Historical
• Publication Date: 31-Mar-2021
• ICS: 83.180 - Adhesives
• Technical Committee: E06 - Performance of Buildings
• Drafting Committee: E06.53 - Materials and Processes for Durable Rigidwall Relocatable Structures

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:E1794 −21
Standard Specification for
Adhesive for Bonding Foam Cored Sandwich Panels (200°F
1
Elevated Humidity Service), Type II Panels
This standard is issued under the fixed designation E1794; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope B209 Specification for Aluminum and Aluminum-Alloy
Sheet and Plate
1.1 Thisspecificationcoverstwo-partadhesivesforbonding
D1002Test Method for Apparent Shear Strength of Single-
foamcoresandwichpanels.Theadhesivemaybeusedfornew
Lap-Joint Adhesively Bonded Metal Specimens by Ten-
production or depot maintenance. The adhesive should be
sion Loading (Metal-to-Metal)
suitable for forming bonds that can withstand long-term
E631Terminology of Building Constructions
exposure to temperatures from−55°C to 93°C (−67°F to
E864Practice for Surface Preparation of Aluminum Alloys
200 °F) and also withstand combinations of stress,
to Be Adhesively Bonded in Honeycomb Shelter Panels
temperature, and humidity expected to be encountered in
E1749Terminology Relating to Rigid Wall Relocatable
service. The adhesives shall be used for bonding aluminum
Shelters
alloy facing to foam core, inserts, internal aluminum framing
3
2.2 Military Standard:
members, and other components of a foam cored sandwich
MIL-STD-202FTest Methods for Electronic and Electrical
panel.
Component Parts
1.2 The values stated in SI units are to be regarded as the 4
2.3 SAE Specification:
standard where only SI units are given or where SI units are
AMS-QQ-A-250AluminumandAluminumAlloy,Plateand
given first followed by inch-pound units; where inch-pound
Sheet General Specification for
units are given first followed by SI units, the inch-pound units
are to be regarded as the standard.
3. Terminology
1.3 This standard does not purport to address all of the
3.1 Definitions:
safety concerns, if any, associated with its use. It is the
3.1.1 For definitions of general terms related to building
responsibility of the user of this standard to establish appro-
construction used in this specification, refer to Terminology
priate safety, health, and environmental practices and deter-
E631, and for general terms related to rigid wall relocatable
mine the applicability of regulatory limitations prior to use.
shelters, refer to Terminology E1749.
1.4 This international standard was developed in accor-
3.2 Definitions of Terms Specific to This Standard:
dance with internationally recognized principles on standard-
3.2.1 adhesive life, n—the maximum time that an adhesive,
ization established in the Decision on Principles for the
when mixed in a prescribed quantity can set at a designated
Development of International Standards, Guides and Recom-
temperature, after which the adhesive, when used to prepare
mendations issued by the World Trade Organization Technical
specimens, will deliver the required properties.
Barriers to Trade (TBT) Committee.
4. Requirements
2. Referenced Documents
2 4.1 Material—The adhesive shall be a two-part thermoset-
2.1 ASTM Standards:
tingepoxypastecontainingnoasbestosand,whentestedusing
the test methods described in Section 6, shall meet the
1
This specification is under the jurisdiction of ASTM Committee E06 on
requirements of Section 4. The adhesive shall not have a
Performance of Buildings and is the direct responsibility of Subcommittee E06.53
deleterious effect on the components being bonded over the
on Materials and Processes for Durable Rigidwall Relocatable Structures.
range of temperatures at which the adhesive will be used.
Current edition approved April 1, 2021. Published April 2021. Originally
approved in 1996. Last previous edition approved in 2013 as E1794–13. DOI:
10.1520/E1794-21.
2 3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from DLA Document Services, Building 4/D, 700 Robbins Avenue,
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Philadelphia, PA 19111-5094, http://quicksearch.dla.mil/.
4
Standards volume information, refer to the standard’s Document Summary page on AvailablefromSAEInternational(SAE),400CommonwealthDr.,Warrendale,
the ASTM website. PA 15096, http://www.sae.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E1794−21
4.2 Working Characteristics: except that the length of the test coupon shall be 103.7 mm
1
4.2.1 Application—The adhesive shall be suitable for appli- (4 ⁄4in.) and the
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: E1794 − 13 E1794 − 21
Standard Specification for
Adhesive for Bonding Foam Cored Sandwich Panels
1
(200°F(200 °F Elevated Humidity Service), Type II Panels
This standard is issued under the fixed designation E1794; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope
1.1 This specification covers two-part adhesives for bonding foam core sandwich panels. The adhesive may be used for new
production or depot maintenance. The adhesive should be suitable for forming bonds that can withstand long-term exposure to
temperatures from −55from −55 °C to 93°C (−6793 °C (−67 °F to 200°F)200 °F) and also withstand combinations of stress,
temperature, and humidity expected to be encountered in service. The adhesives shall be used for bonding aluminum alloy facing
to foam core, inserts, internal aluminum framing members, and other components of a foam cored sandwich panel.
1.2 The values stated in SI units are to be regarded as the standard where only SI units are given or where SI units are given first
followed by inch-pound units; where inch-pound units are given first followed by SI units, the inch-pound units are to be regarded
as the standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
B209 Specification for Aluminum and Aluminum-Alloy Sheet and Plate
D1002 Test Method for Apparent Shear Strength of Single-Lap-Joint Adhesively Bonded Metal Specimens by Tension Loading
(Metal-to-Metal)
E631 Terminology of Building Constructions
E864 Practice for Surface Preparation of Aluminum Alloys to Be Adhesively Bonded in Honeycomb Shelter Panels
E1749 Terminology Relating to Rigid Wall Relocatable Shelters
3
2.2 Military Standard:
MIL-STD-202F Test Methods for Electronic and Electrical Component Parts
1
This specification is under the jurisdiction of ASTM Committee E06 on Performance of Buildings and is the direct responsibility of Subcommittee E06.53 on Materials
and Processes for Durable Rigidwall Relocatable Structures.
Current edition approved Oct. 1, 2013April 1, 2021. Published February 2014April 2021. Originally approved in 1996. Last previous edition approved in 20082013 as
E1794 – 08.E1794 – 13. DOI: 10.1520/E1794-13.10.1520/E1794-21.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’sstandard’s Document Summary page on the ASTM website.
3
Available from DLA Document Services, Building 4/D, 700 Robbins Avenue, Philadelphia, PA 19111-5094, http://quicksearch.dla.mil/.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E1794 − 21
4
2.3 FederalSAE Specification:
QQ-A-250/11dAMS-QQ-A-250 Aluminum Alloy 6061 T6and Aluminum Alloy, Plate and Sheet General Specification for
3. Terminology
3.1 Definitions—See Terminologies E631 and E1749 for definitions of terms used in this specification.
3.1 Definitions:
3.1.1 For definitions of general terms related to building construction used in this specification, refer to Terminology E631, and
for general terms related to rigid wall relocatable shelters, refer to Terminology E1749.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 adhesive life—life, n—the maximum time that an adhesive, when mixed in a prescribed quantity can set at a designated
temperature, after which the adhesive, when used to prepare specimens, will deliver the required properties.
4. Requirements
4.1 Material—The adhesive shall be a two-part
...