Standard Classification System for
Specifying Plastic Materials1
This standard is issued under the fixed designation D 4000; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of the 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 Department of Defense.
1.1 This standard provides a classification system for tabulating the properties of unfilled, filled, and reinforced plastic
materials suitable for processing into parts.
NOTE 1—The classification system may serve many of the needs of
industries using plastic materials. The standard is subject to revision as the
need requires; therefore, the latest revision should always be used.
1.2 The classification system and subsequent line callout
(specification) is intended to be a means of identifying plastic
materials used in the fabrication of end items or parts. It is not
intended for the selection of materials. Material selection
should be made by those having expertise in the plastics field
after careful consideration of the design and the performance
required of the part, the environment to which it will be
exposed, the fabrication process to be employed, the inherent
properties of the material not covered in this document, and the
1.3 This classification system is based on the premise that
plastic materials can be arranged into broad generic families
using basic properties to arrange the materials into groups,
classes, and grades. A system is thus established which,
together with values describing additional requirements, permits as complete a description as desired of the selected
1.4 In all cases where the provisions of this classification
system would conflict with the referenced ASTM specification
for a particular material, the latter shall take precedence.
NOTE 2—When using this classification system the two-letter, three-digit suffix system applies.
NOTE 3—When a material is used to fabricate a part where the
requirements are too specific for a broad material callout, it is advisable
for the user to consult the supplier to secure callout of the properties to suit
the actual conditions to which the part is to be subjected.
1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
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