ASTM D6112 - 13

    Standard Test Methods for Compressive and Flexural Creep and Creep-Rupture of Plastic Lumber and Shapes

    Active Standard ASTM D6112 | Developed by Subcommittee: D20.20

    Book of Standards Volume: 08.03


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    Significance and Use

    5.1 Data from creep and creep-rupture tests are necessary to predict the creep modulus and strength of materials under long-term loads and to predict dimensional changes that have the potential to occur as a result of such loads.

    5.2 Data from these test methods can be used to characterize plastic lumber: for comparison purposes, for the design of fabricated parts, to determine long-term performance under constant load, and under certain conditions, for specification purposes.

    5.3 For many products, it is possible that there will 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 product specification before using this test method. Table 1 in Classification D4000 lists the ASTM materials standards that currently exist.

    1. Scope

    1.1 These test methods cover the determination of the creep and creep-rupture properties of plastic lumber and shapes, when loaded in compression or flexure under specified environmental conditions. Test specimens in the “as-manufactured” form are employed. As such, these are test methods for evaluating the properties of plastic lumber or shapes as a product and not material property test methods.

    1.2 Plastic lumber and plastic shapes are currently made predominantly with recycled plastics. However, this test method would also be applicable to similar manufactured plastic products made from virgin resins where the product is non-homogenous in the cross-section.

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

    1.4 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 and health practices and determine the applicability of regulatory limitations prior to use.

    Note 1There is no known ISO equivalent to this standard.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D543 Practices for Evaluating the Resistance of Plastics to Chemical Reagents

    D883 Terminology Relating to Plastics

    D2990 Test Methods for Tensile, Compressive, and Flexural Creep and Creep-Rupture of Plastics

    D4000 Classification System for Specifying Plastic Materials

    D5033 Guide for Development of ASTM Standards Relating to Recycling and Use of Recycled Plastics

    D5947 Test Methods for Physical Dimensions of Solid Plastics Specimens

    E4 Practices for Force Verification of Testing Machines


    ICS Code

    ICS Number Code 83.140.01 (Rubber and plastic products in general)

    UNSPSC Code

    UNSPSC Code 13100000(Rubber and elastomers); 41114606(Creep testers)


    Referencing This Standard

    DOI: 10.1520/D6112

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM D6112-13, Standard Test Methods for Compressive and Flexural Creep and Creep-Rupture of Plastic Lumber and Shapes, ASTM International, West Conshohocken, PA, 2013, www.astm.org

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