ASTM D4549-15

Standard Classification System and Basis for Specification for Polystyrene and Rubber-Modified Polystyrene Molding and Extrusion Materials (PS)

ABSTRACT
This specification, which covers polystyrene materials, both crystal and rubber modified suitable for molding and extrusion, is intended to be a means of calling out plastic materials used in the fabrication of end items or parts. Polystyrene materials are classified according to classes after being grouped as crystal, rubber modified, and others. The materials are further classified according to grades after being grouped as general-purpose, other medium impact, high impact, super-high-impact, and others. The materials shall conform to the prescribed injection molded properties and natural colors.
SCOPE
1.1 This classification system covers polystyrene materials, both crystal and rubber modified, suitable for molding and extrusion.  
1.2 This classification system and subsequent line callout (specification) are intended to be a means of calling out plastic materials used in the fabrication of end items or parts. It is not intended for the selection of materials. Material selection can 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 other than those covered by this specification, and the economics.  
1.3 The properties included in this specification are those required to identify the compositions covered. Other requirements necessary to identify particular characteristics important to specialized applications are to be specified using the suffixes as given in Section 5.  
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
Note 1: This standard combines elements from ISO 1622-1-2 and ISO 2897-1-2, but is not equivalent to either ISO standard.

General Information

• Status: Historical
• Publication Date: 31-Aug-2015
• ICS: 83.080.10 - Thermosetting materials
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.15 - Thermoplastic Materials

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D4549 −15
Standard Classification System and Basis for Specification for
Polystyrene and Rubber-Modified Polystyrene Molding and
1
Extrusion Materials (PS)
This standard is issued under the fixed designation D4549; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* D648 Test Method for Deflection Temperature of Plastics
Under Flexural Load in the Edgewise Position
1.1 This classification system covers polystyrene materials,
D790 Test Methods for Flexural Properties of Unreinforced
both crystal and rubber modified, suitable for molding and
and Reinforced Plastics and Electrical Insulating Materi-
extrusion.
als
1.2 This classification system and subsequent line callout
D792 Test Methods for Density and Specific Gravity (Rela-
(specification) are intended to be a means of calling out plastic
tive Density) of Plastics by Displacement
materials used in the fabrication of end items or parts. It is not
D883 Terminology Relating to Plastics
intended for the selection of materials. Material selection can
D1238 Test Method for Melt Flow Rates of Thermoplastics
be made by those having expertise in the plastics field after
by Extrusion Plastometer
careful consideration of the design and the performance
D1525 Test Method for Vicat Softening Temperature of
required of the part, the environment to which it will be
Plastics
exposed, the fabrication process to be employed, the inherent
D1600 Terminology forAbbreviatedTerms Relating to Plas-
properties of the material other than those covered by this
tics
specification, and the economics.
D3892 Practice for Packaging/Packing of Plastics
D4000 Classification System for Specifying Plastic Materi-
1.3 The properties included in this specification are those
required to identify the compositions covered. Other require- als
D5630 Test Method for Ash Content in Plastics
ments necessary to identify particular characteristics important
to specialized applications are to be specified using the suffixes E29 Practice for Using Significant Digits in Test Data to
5. Determine Conformance with Specifications
as given in Section
ManualonPresentationofDataandControlChartAnalysis,
1.4 The values stated in SI units are to be regarded as
8th Edition, Catalog Number: MNL7-8TH-EB
standard. No other units of measurement are included in this
3
2.2 ISO Standards:
standard.
ISO 1622-1-2 Polystyrene (PS) Molding and Extrusion
NOTE 1—This standard combines elements from ISO 1622-1-2 and ISO
Materials—Part 1: Designation System and Basis for
2897-1-2, but is not equivalent to either ISO standard.
Specifications
ISO 1622-2 Polystyrene (PS) Molding and Extrusion
2. Referenced Documents
2 Materials—Part 2: Preparation of Test Specimens and
2.1 ASTM Standards:
Determination of Properties
D256 Test Methods for Determining the Izod Pendulum
ISO 2897-1 Impact-Resistant Polystyrene (PS-I) Molding
Impact Resistance of Plastics
and Extrusion Materials—Part 1: Designation System and
D638 Test Method for Tensile Properties of Plastics
Basis for Specifications
ISO 2897-2 Impact-Resistant Polystyrene (PS-I) Molding
and Extrusion Materials—Part 2: Preparation of Test
1
This specification is under the jurisdiction of ASTM Committee D20 on
Specimens and Determination of Properties
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic
Materials.
3. Terminology
Current edition approved Sept. 1, 2015. Published September 2015. Originally
approved in 1985. Last previous edition approved in 2011 as D4549 – 11. DOI:
3.1 Definitions—The terminology used in this classification
10.1520/D4549-15.
system is in accordance with Terminologies D883 and D1600.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036, http://www.ansi.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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D4549−15
additives can be shown on the supplier’s Technical Data Sheet unless it is
4. Classification
proprietary. If necessary, additional requirements shall be indicated by the
4.1 Polystyrene materials are classified into groups in ac-
use of the suff
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D4549 − 11 D4549 − 15
Standard Classification System and Basis for Specification for
Polystyrene and Rubber-Modified Polystyrene Molding and
1
Extrusion Materials (PS)
This standard is issued under the fixed designation D4549; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*
1.1 This classification system covers polystyrene materials, both crystal and rubber modified, suitable for molding and
extrusion.
1.2 This classification system and subsequent line callout (specification) are intended to be a means of calling out plastic
materials used in the fabrication of end items or parts. It is not intended for the selection of materials. Material selection can 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
other than those covered by this specification, and the economics.
1.3 The properties included in this specification are those required to identify the compositions covered. Other requirements
necessary to identify particular characteristics important to specialized applications are to be specified using the suffixes as given
in Section 5.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
NOTE 1—This standard combines elements from ISO 1622-1-2 and ISO 2897-1-2, but is not equivalent to either ISO standard.
2. Referenced Documents
2
2.1 ASTM Standards:
D256 Test Methods for Determining the Izod Pendulum Impact Resistance of Plastics
D638 Test Method for Tensile Properties of Plastics
D648 Test Method for Deflection Temperature of Plastics Under Flexural Load in the Edgewise Position
D790 Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials
D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
D883 Terminology Relating to Plastics
D1238 Test Method for Melt Flow Rates of Thermoplastics by Extrusion Plastometer
D1525 Test Method for Vicat Softening Temperature of Plastics
D1600 Terminology for Abbreviated Terms Relating to Plastics
D3892 Practice for Packaging/Packing of Plastics
D4000 Classification System for Specifying Plastic Materials
D5630 Test Method for Ash Content in Plastics
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E105 Practice for Probability Sampling of MaterialsManual on Presentation of Data and Control Chart Analysis, 8th Edition,
Catalog Number: MNL7-8TH-EB
3
2.2 ISO Standards:
ISO 1622-1-2 Polystyrene (PS) Molding and Extrusion MaterialsMaterials—Part 1: Designation System and Basis for
Specifications
1
This specification is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic Materials.
Current edition approved April 1, 2011Sept. 1, 2015. Published April 2011September 2015. Originally approved in 1985. Last previous edition approved in 20032011 as
D4549 – 03.D4549 – 11. DOI: 10.1520/D4549-11.10.1520/D4549-15.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D4549 − 15
ISO 1622-2 Polystyrene (PS) Molding and Extrusion Materials—Part 2: Preparation of Test Specimens and Determination of
Properties
ISO 2897-1-22897-1 Impact Resistant Impact-Resistant Polystyrene (PS-I) Molding and Extrusion MaterialsMaterials—Part 1:
Designation System and Basis for Specifications
ISO 2897-2 Impact-Resistant Polystyrene (PS-I) Molding and Extrusion Materials—Pa
...