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. Designation: D897 - 08 (Reapproved 2024) INTERNATIONAL Standard Test Method for Tensile Properties of Adhesive Bonds1 This standard is issued under the fixed designation D897; 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 (e) 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. INTRODUCTION The accuracy of the results of strength tests of adhesive bonds will depend on the conditions under which the bonding process is carried out. Unless otherwise agreed upon by the manufacturer and the purchaser, the bonding conditions shall be prescribed by the manufacturer of the adhesive. In order to ensure that complete information is available to the individual conducting the tests, the manufacturer of the adhesive shall furnish numerical values and other specific information for each of the following variables: (1) Procedure for preparation of surfaces prior to application of the adhesive, including the cleaning and drying of metal surfaces, and special surface treatments which are not specifically limited by the pertinent test method. (2) Complete mixing directions for the adhesive. (3) Conditions for application of the adhesive including the rate of spread or thickness of film, number of coats to be applied, whether to be applied to one or both surfaces, and the conditions of drying where more than one coat is required. (4) Assembly conditions before application of pressure, including the room temperature, length of time, and whether open or closed assembly is to be used. (5) Curing conditions, including the amount of pressure to be applied, the length of time under pressure, and the temperature of the assembly when under pressure. It should be stated whether this temperature is that of the bond line, or of the atmosphere at which the assembly is to be maintained. (6) Conditioning procedure before testing, unless a standard procedure is specified, including the length of time, temperature, and relative humidity. A range may be prescribed for any variable by the manufacturer of the adhesive if it can be assumed by the test operator that any arbitrarily chosen value within such a range or any combination of such values for several variables will be acceptable to both the manufacturer and the purchaser of the adhesive. 1. Scope 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information 1.1 This test method covers the determination of the com- only. parative tensile properties of the adhesive bonds of metal to metal when tested on standard shape specimens and under 1.3 This standard does not purport to address all of the defined conditions of pretreatment, temperature, and testing safety concerns, if any, associated with its use. It is the machine speed. responsibility of the user of this standard to establish appro- priate safety, health, and environmental practices and deter- I This test method is under the jurisdiction of ASTM Committee D14 on mine the applicability of regulatory limitations prior to use. Adhesives and is the direct responsibility of Subcommittee D14.80 on Metal 1.4 This international standard was developed in accor- Bonding Adhesives. Current edition approved Sept. 1, 2024. Published September 2024. Originally dance with internationally recognized principles on standard- approved in 1949. Last previous edition approved in 2016 as D897-08 (2016). ization establish