ASTM D648-18
Standard Test Method for Deflection Temperature of Plastics Under Flexural Load in the Edgewise Position

Standard No.

ASTM D648-18

Release Date

2018

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM D648-18

Scope

5.1 This test is particularly suited to control and development work. Data obtained by this test method shall not be used to predict the behavior of plastic materials at elevated temperatures except in applications in which the factors of time, temperature, method of loading, and fiber stress are similar to those specified in this test method. The data are not intended for use in design or predicting endurance at elevated temperatures.

5.2 For many materials, there may be a specification that requires the use of this test method, but with some procedural modifications that take precedence when adhering to the specification. Therefore, it is advisable to refer to that material specification before using this test method. Refer to Table 1 in Classification D4000, which lists the ASTM material standards that currently exist.

1.1 This test method covers the determination of the temperature at which an arbitrary deformation occurs when specimens are subjected to an arbitrary set of testing conditions.

1.2 This test method applies to molded and sheet materials available in thicknesses of 3 mm (¹/₈ in.) or greater and which are rigid or semirigid at normal temperature.

Note 1: Sheet stock less than 3 mm (0.125 in.) but more than 1 mm (0.040 in.) in thickness may be tested by use of a composite sample having a minimum thickness of 3 mm. The laminae must be of uniform stress distribution. One type of composite specimen has been prepared by cementing the ends of the laminae together and then smoothing the edges with sandpaper. The direction of loading shall be perpendicular to the edges of the individual laminae.

1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.

1.4 Some older machines still use mercury-in-glass thermometers. (Warning—Mercury has been designated by many regulatory agencies as a hazardous material that can cause serious medical issues. Mercury, or its vapor, has been demonstrated to be hazardous to health and corrosive to materials. Caution should be taken when handling mercury and mercury containing products. See the applicable product Safety Data Sheet (SDS) for additional information. Users should be aware that selling mercury and/or mercury containing products into your state or country may be prohibited by law.

1.5 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.

Note 2: The text of this standard references notes and footnotes that provide ex......

ASTM D648-18 Referenced Document

• ASTM D4000 Standard Classification System for Specifying Plastic Materials
• ASTM D5947 Standard Test Methods for Physical Dimensions of Solid Plastics Specimens
• ASTM D618 Standard Practice for Conditioning Plastics for Testing
• ASTM D883 Standard Terminology Relating to Plastics
• ASTM E1 Standard Specification for ASTM Thermometers
• ASTM E1137/E1137M Standard Specification for Industrial Platinum Resistance Thermometers
• ASTM E2251 Standard Specification for Liquid-in-Glass ASTM Thermometers with Low-Hazard Precision Liquids
• ASTM E608/E608M Standard Specification for Mineral-Insulated, Metal-Sheathed Base Metal Thermocouples
• ASTM E691 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
• ASTM E77 Standard Test Method for Inspection and Verification of Thermometers
• ISO 75-1 Plastics — Determination of temperature of deflection under load — Part 3: High-strength thermosetting laminates and long-fibre-reinforced plastics
• ISO 75-2 Plastics - Determination of temperature of deflection under load - Part 2: Plastics and ebonite

ASTM D648-18 history

• 2018 ASTM D648-18 Standard Test Method for Deflection Temperature of Plastics Under Flexural Load in the Edgewise Position
• 2016 ASTM D648-16 Standard Test Method for Deflection Temperature of Plastics Under Flexural Load in the Edgewise Position
• 2007 ASTM D648-07 Standard Test Method for Deflection Temperature of Plastics Under Flexural Load in the Edgewise Position
• 2006 ASTM D648-06 Standard Test Method for Deflection Temperature of Plastics Under Flexural Load in the Edgewise Position
• 2004 ASTM D648-04 Standard Test Method for Deflection Temperature of Plastics Under Flexural Load in the Edgewise Position
• 2001 ASTM D648-01 Standard Test Method for Deflection Temperature of Plastics Under Flexural Load in the Edgewise Position
• 2000 ASTM D648-00a Standard Test Method for Deflection Temperature of Plastics Under Flexural Load in the Edgewise Position