ASTM D6341-16
Standard Test Method for Determination of the Linear Coefficient of Thermal Expansion of Plastic Lumber and Plastic Lumber Shapes Between &x2013;30 and 140&xb0;F (&x2013;34.4 and 60&xb0;C)

Standard No.

ASTM D6341-16

Release Date

2016

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D6341-21

Latest

ASTM D6341-21

Scope

5.1 The coefficient of linear thermal expansion, α, between temperatures T₁ and T₂ for a specimen whose length is L₀ at the reference temperature, is given by the following equation:

Where L₁ and L₂ are the specimen lengths at temperatures T₁ and T₂, respectively. α is, therefore, obtained by dividing the linear expansion per unit length by the change in temperature.

5.2 The nature of most plastics and the construction applications for which plastic lumber and plastic lumber shapes are used, make –30 to 140°F (–34.4 to 60°C) a practical temperature range for linear thermal expansion measurements. Where testing outside of this temperature range or when linear thermal expansion characteristics of a particular plastic are not known through this temperature range, particular attention shall be paid to the factors mentioned in 1.2 and it is possible that special preliminary investigations by thermo-mechanical analysis, such as what is prescribed in Practice D4065 for the location of transition temperatures, will be required, in order to avoid excessive error. If such a transition point is located, a separate coefficient of expansion for a temperature range below and above the transition point shall be determined. For specification and comparison purposes (provided it is known that no transition exists in this range), the range from –30 to 140°F (–34.4 to 60°C) shall be used. (For reference, glass transition and melting point temperatures of typical resins used in plastic lumber products are given in Appendix X2 of this test method.)

1.1 This test method covers the determination of the coefficient of linear thermal expansion for plastic lumber and plastic lumber shapes to two significant figures. The determination is made by taking measurements with a caliper at three discrete temperatures. At the test temperatures and under the stresses imposed, the plastic lumber shall have a negligible creep or elastic strain rate, or both, insofar as these properties would significantly affect the accuracy of the measurements.

1.1.1 This test method details the determination of the linear coefficient of thermal expansion of plastic lumber and plastic lumber shapes in their “as manufactured” form. As such, this is a test method for evaluating the properties of plastic lumber or shapes as a product an......

ASTM D6341-16 Referenced Document

• ASTM D4065 Standard Practice for Plastics: Dynamic Mechanical Properties: Determination and Report of Procedures
• ASTM D5033 Standard Guide for Development of ASTM Standards Relating to Recycling and Use of Recycled Plastics
• ASTM D6117 Standard Test Methods for Mechanical Fasteners In Plastic Lumber and Shapes
• ASTM D883 Standard Terminology Relating to Plastics
• ASTM E831 Standard Test Method for Linear Thermal Expansion of Solid Materials by Thermomechanical Analysis

ASTM D6341-16 history

• 2021 ASTM D6341-21 Standard Test Method for Determination of the Linear Coefficient of Thermal Expansion of Plastic Lumber and Plastic Lumber Shapes Between –30 and 140°F (–34.4 and 60°C)
• 2016 ASTM D6341-16 Standard Test Method for Determination of the Linear Coefficient of Thermal Expansion of Plastic Lumber and Plastic Lumber Shapes Between &x2013;30 and 140&xb0;F (&x2013;34.4 and 60&xb0;C)
• 2014 ASTM D6341-14a Standard Test Method for Determination of the Linear Coefficient of Thermal Expansion of Plastic Lumber and Plastic Lumber Shapes Between –30 and 140°F &40;–34.4 and 60°C&41;
• 2014 ASTM D6341-14 Standard Test Method for Determination of the Linear Coefficient of Thermal Expansion of Plastic Lumber and Plastic Lumber Shapes Between ndash;30 and 140deg;F 40;ndash;34.4 and 60deg;C41;
• 2013 ASTM D6341-13 Standard Test Method for Determination of the Linear Coefficient of Thermal Expansion of Plastic Lumber and Plastic Lumber Shapes Between ndash;30 and 140deg;F (ndash;34.4 and 60deg;C)
• 2010 ASTM D6341-10 Standard Test Method for Determination of the Linear Coefficient of Thermal Expansion of Plastic Lumber and Plastic Lumber Shapes Between -30 and 140&176F (-34.4 and 60&176C)
• 1998 ASTM D6341-98(2005) Standard Test Method for Determination of the Linear Coefficient of Thermal Expansion of Plastic Lumber and Plastic Lumber Shapes Between -30 and 140176F (-34.4 and 60176C)
• 1998 ASTM D6341-98 Standard Test Method for Determination of the Linear Coefficient of Thermal Expansion of Plastic Lumber and Plastic Lumber Shapes Between -30 and 140176F (-34.4 and 60176C)