ASTM D 790 : 2017
Current
The latest, up-to-date edition.
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English
07-01-2017
These test methods are used to determine the flexural properties of unreinforced and reinforced plastics, including high modulus composites and electrical insulating materials utilizing a three-point loading system to apply a load to a simply supported beam (specimen).
1.1These test methods are used to determine the flexural properties of unreinforced and reinforced plastics, including high modulus composites and electrical insulating materials utilizing a three-point loading system to apply a load to a simply supported beam (specimen). The method is generally applicable to both rigid and semi-rigid materials, but flexural strength cannot be determined for those materials that do not break or yield in the outer surface of the test specimen within the 5.0 % strain limit.
1.2Test specimens of rectangular cross section are injection molded or, cut from molded or extruded sheets or plates, or cut from molded or extruded shapes. Specimens must be solid and uniformly rectangular. The specimen rests on two supports and is loaded by means of a loading nose midway between the supports.
1.3Measure deflection in one of two ways; using crosshead position or a deflectometer. Please note that studies have shown that deflection data obtained with a deflectometer will differ from data obtained using crosshead position. The method of deflection measurement shall be reported.
Note 1:Requirements for quality control in production environments are usually met by measuring deflection using crosshead position. However, more accurate measurement may be obtained by using an deflection indicator such as a deflectometer.
Note 2:Materials that do not rupture by the maximum strain allowed under this test method may be more suited to a 4-point bend test. The basic difference between the two test methods is in the location of the maximum bending moment and maximum axial fiber stresses. The maximum axial fiber stresses occur on a line under the loading nose in 3-point bending and over the area between the loading noses in 4-point bending. A four-point loading system method can be found in Test Method D6272.
1.4The values stated in SI units are to be regarded as the standard. The values provided in parentheses are for information only.
1.5The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.
1.6This 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 and health practices and determine the applicability of regulatory limitations prior to use.
Note 3:This standard and ISO 178 address the same subject matter, but differ in technical content.
1.7This 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.
| Committee |
D 20
|
| DocumentType |
Test Method
|
| Pages |
12
|
| PublisherName |
American Society for Testing and Materials
|
| Status |
Current
|
| Supersedes |
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| ASTM D 883 : 2023 | Standard Terminology Relating to Plastics |
| ASTM D 4101 : 2001 : REV A | Standard Specification for Polypropylene Injection and Extrusion Materials |
| ASTM D 4101 : 2001 | Standard Specification for Polypropylene Injection and Extrusion Materials |
| ASTM D 4101 : 2006 : REV B | Standard Specification for Polypropylene Injection and Extrusion Materials |
| ASTM D 4101 : 2005 | Standard Specification for Polypropylene Injection and Extrusion Materials |
| ASTM D 5947 : 1996 | Standard Test Methods for Physical Dimensions of Solid Plastics Specimens |
| ASTM D 4101 : 2000 | Standard Specification for Polypropylene Injection and Extrusion Materials |
| ASTM E 83 : 2023 | Standard Practice for Verification and Classification of Extensometer Systems |
| ASTM D 4000 : 2013 | Standard Classification System for Specifying Plastic Materials |
| ASTM D 4101 : 2008 | Standard Specification for Polypropylene Injection and Extrusion Materials |
| ASTM D 4101 : 2006 | Standard Specification for Polypropylene Injection and Extrusion Materials |
| ASTM D 4101 : 2004 | Standard Specification for Polypropylene Injection and Extrusion Materials |
| ASTM D 6272 : 2010 | Standard Test Method for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials by Four-Point Bending |
| ASTM E 83 : 2000 : EDT 1 | Standard Practice for Verification and Classification of Extensometer |
| ASTM D 4101 : 2014 : EDT 2 | Standard Specification for Polypropylene Injection and Extrusion Materials |
| ASTM D 4000 : 2003 : REV A | Standard Classification System for Specifying Plastic Materials |
| ASTM D 4000 : 2000 : REV A | Standard Classification System for Specifying Plastic Materials |
| ASTM D 5947 : 2002 | Standard Test Methods for Physical Dimensions of Solid Plastics Specimens |
| ASTM D 4101 : 2010 | Standard Specification for Polypropylene Injection and Extrusion Materials |
| ASTM D 4101 : 2011 | Standard Specification for Polypropylene Injection and Extrusion Materials |
| ASTM D 883 : 2024 | Standard Terminology Relating to Plastics |
| ASTM D 4000 : 2012 | Standard Classification System for Specifying Plastic Materials |
| ASTM E 83 : 2016 | Standard Practice for Verification and Classification of Extensometer Systems |
| ASTM D 4000 : 2009 | Standard Classification System for Specifying Plastic Materials |
| ASTM D 4101 : 2005 : REV A | Standard Specification for Polypropylene Injection and Extrusion Materials |
| ASTM E 83 : 1998 : EDT 1 | Standard Practice for Verification and Classification of Extensometer |
| ASTM D 4101 : 2007 | Standard Specification for Polypropylene Injection and Extrusion Materials |
| ASTM D 4101 : 2002 : REV A | Standard Specification for Polypropylene Injection and Extrusion Materials |
| ASTM D 4000 : 2011 | Standard Classification System for Specifying Plastic Materials |
| ASTM D 883 : 2022 | Standard Terminology Relating to Plastics |
| ASTM D 883 : 2020 : REV B | Standard Terminology Relating to Plastics |
| ASTM D 5947 : 2011 | Standard Test Methods for Physical Dimensions of Solid Plastics Specimens |
| ASTM D 4101 : 2003 : REV B | Standard Specification for Polypropylene Injection and Extrusion Materials |
| ASTM D 5947 : 2018 | Standard Test Methods for Physical Dimensions of Solid Plastics Specimens |
| ASTM E 691 : 2020 | Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method |
| ASTM D 4101 : 2002 : REV B | Standard Specification for Polypropylene Injection and Extrusion Materials |
| ASTM D 4000 : 2004 : EDT 1 | Standard Classification System for Specifying Plastic Materials |
| ASTM D 4101 : 2009 | Standard Specification for Polypropylene Injection and Extrusion Materials |
| AS ISO/ASTM 52910:2020 | Additive manufacturing - Design - Requirements, guidelines and recommendations |
| ASTM D 6272 : 2017 : EDT 1 | Standard Test Method for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials by Four-Point Bending |
| ASTM D 4000 : 2023 | Standard Classification System for Specifying Plastic Materials |
| ASTM D 4101 : 2006 : REV A | Standard Specification for Polypropylene Injection and Extrusion Materials |
| ASTM E 691 : 2019 : EDT 1 | Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method |
| ASTM E 691 : 2023 | Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method |
| ASTM D 4000 : 2009 : REV B | Standard Classification System for Specifying Plastic Materials |
| ASTM D 4000 : 2000 | Standard Classification System for Specifying Plastic Materials |
| ASTM D 5947 : 2006 | Standard Test Methods for Physical Dimensions of Solid Plastics Specimens |
| ASTM D 4000 : 2010 : REV A | Standard Classification System for Specifying Plastic Materials |
| ASTM D 4101 : 2004 : REV A | Standard Specification for Polypropylene Injection and Extrusion Materials |
| ASTM D 4101 : 1982 : R1988 : EDT 1 | Standard Specification for Propylene Plastic Injection and Extrusion Materials |
| ASTM D 4101 : 2017 | Standard Classification System and Basis for Specification for Polypropylene Injection and Extrusion Materials |
| ASTM D 4000 : 2007 | Standard Classification System for Specifying Plastic Materials |
| ASTM D 4000 : 2009 : REV A | Standard Classification System for Specifying Plastic Materials |
| ASTM E 691 : 2022 | Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method |
| ASTM D 4000 : 2001 | Standard Classification System for Specifying Plastic Materials |
| ASTM D 4101 : 2014 | Standard Specification for Polypropylene Injection and Extrusion Materials |
| ASTM E 691 : 2009 | Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method |
| ASTM D 4000 : 2008 | Standard Classification System for Specifying Plastic Materials |
| ASTM D 638 : 2014 | Standard Test Method for Tensile Properties of Plastics |
| ASTM D 6272 : 2017 | Standard Test Method for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials by Four-Point Bending |
| ASTM D 4101 : 2010 : REV A | Standard Specification for Polypropylene Injection and Extrusion Materials |
| ASTM D 6272 : 2002 | Standard Test Method for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials by Four-Point Bending |
| ASTM D 6272 : 2002 : R2008 : EDT 1 | Standard Test Method for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials by Four-Point Bending |
| ASTM D 618 : 2013 | Standard Practice for Conditioning Plastics for Testing |
| ASTM E 4 : 2021 | Standard Practices for Force Calibration and Verification of Testing Machines |
| ASTM E 691 : 2021 | Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method |
| ASTM D 5947 : 2003 | Standard Test Methods for Physical Dimensions of Solid Plastics Specimens |
| ASTM D 4101 : 2024 | Standard Classification System and Basis for Specification for Polypropylene Injection and Extrusion Materials |
| ASTM D 4000 : 2001 : REV A : EDT 1 | Standard Classification System for Specifying Plastic Materials |
| ASTM D 5947 : 2001 : EDT 1 | Standard Test Methods for Physical Dimensions of Solid Plastics Specimens |
| ASTM E 2309 : 2005 | Standard Practices for Verification of Displacement Measuring Systems and Devices Used in Material Testing Machines |
| ASTM D 4101 : 2003 | Standard Specification for Polypropylene Injection and Extrusion Materials |
| ASTM D 4000 : 2004 | Standard Classification System for Specifying Plastic Materials |
| ASTM D 4101 : 2003 : REV A | Standard Specification for Polypropylene Injection and Extrusion Materials |
| ASTM D 4000 : 2010 | Standard Classification System for Specifying Plastic Materials |
| ASTM D 4101 : 2002 | Standard Specification for Polypropylene Injection and Extrusion Materials |
| ASTM D 6272 : 2000 | Standard Test Method for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials by Four-Point Bending |
| ASTM D 4101 : 2017 : EDT 1 | Standard Classification System and Basis for Specification for Polypropylene Injection and Extrusion Materials |
| ASTM D 4000 : 2003 | Standard Classification System for Specifying Plastic Materials |
| ASTM D 4101 : 2014 : EDT 1 | Standard Specification for Polypropylene Injection and Extrusion Materials |
| ASTM D 4000 : 2020 | Standard Classification System for Specifying Plastic Materials |
| ASTM D 618 : 2021 | Standard Practice for Conditioning Plastics for Testing |
| ASTM D 638 : 2022 | Standard Test Method for Tensile Properties of Plastics |
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