ASTM D4634-16(2022)
(Specification)Standard Classification System and Basis for Specification for Styrene-Maleic Anhydride Molding and Extrusion Materials (S/MA)
Standard Classification System and Basis for Specification for Styrene-Maleic Anhydride Molding and Extrusion Materials (S/MA)
ABSTRACT
This specification covers styrene-maleic anhydride materials suitable for molding and extrusion. It does not however apply to alloys or blends of styrene-maleic anhydride materials with non-elastomeric thermoplastics. The materials shall be conditioned and tested for physical and mechanical properties in the standard laboratory atmosphere. Test specimens and testing parameters for the unreinforced and reinforced, filled, or lubricated materials shall conform to the tensile strength, flexural modulus, Izod impact strength, Vicat softening point, and heat deflection temperature requirements.
SCOPE
1.1 This classification system covers styrene-maleic anhydride materials suitable for molding or extrusion. This classification system does not apply to alloys or blends of styrene-maleic anhydride materials with non-elastomeric thermoplastics. Styrene-maleic anhydride materials, being thermoplastic, are reprocessable and recyclable. This classification system allows for the use of those materials provided that all the specific requirements of this classification system are met.
1.2 The properties included in this standard are those required to identify the compositions covered. Other requirements necessary to identify particular characteristics important to specialized applications are to be specified by using the suffixes as given in Section 5.
1.3 This classification system and subsequent line call out (specification) are intended to provide means of calling out properties of plastic materials used in the fabrication of end items or parts. It is not intended for the selection of materials. Materials should be selected 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, costs involved, and the inherent properties of the material other than those covered by this classification system.
1.4 The values stated in SI units are to be regarded as the standard.
1.5 The following precautionary caveat pertains only to the test methods portion, Section 11, of this classification system. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
Note 1: There is no known ISO equivalent to this standard.
1.6 This 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.
General Information
Relations
Standards Content (Sample)
This 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.
Designation:D4634 −16 (Reapproved 2022)
Standard Classification System and Basis for Specification for
Styrene-Maleic Anhydride Molding and Extrusion Materials
(S/MA)
This standard is issued under the fixed designation D4634; 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.
NOTE 1—There is no known ISO equivalent to this standard.
1. Scope
1.6 This international standard was developed in accor-
1.1 This classification system covers styrene-maleic anhy-
dance with internationally recognized principles on standard-
dride materials suitable for molding or extrusion. This classi-
ization established in the Decision on Principles for the
fication system does not apply to alloys or blends of styrene-
Development of International Standards, Guides and Recom-
maleic anhydride materials with non-elastomeric
mendations issued by the World Trade Organization Technical
thermoplastics. Styrene-maleic anhydride materials, being
Barriers to Trade (TBT) Committee.
thermoplastic, are reprocessable and recyclable. This classifi-
cation system allows for the use of those materials provided
2. Referenced Documents
that all the specific requirements of this classification system
are met.
2.1 ASTM Standards:
D256 Test Methods for Determining the Izod Pendulum
1.2 The properties included in this standard are those
Impact Resistance of Plastics
required to identify the compositions covered. Other require-
D618 Practice for Conditioning Plastics for Testing
ments necessary to identify particular characteristics important
D638 Test Method for Tensile Properties of Plastics
to specialized applications are to be specified by using the
D648 Test Method for Deflection Temperature of Plastics
suffixes as given in Section 5.
Under Flexural Load in the Edgewise Position
1.3 This classification system and subsequent line call out
D790 Test Methods for Flexural Properties of Unreinforced
(specification) are intended to provide means of calling out
and Reinforced Plastics and Electrical Insulating Materi-
properties of plastic materials used in the fabrication of end
als
items or parts. It is not intended for the selection of materials.
D883 Terminology Relating to Plastics
Materials should be selected by those having expertise in the
D1525 Test Method for Vicat Softening Temperature of
plastics field after careful consideration of the design and the
Plastics
performance required of the part, the environment to which it
D1600 Terminology forAbbreviatedTerms Relating to Plas-
will be exposed, the fabrication process to be employed, costs
tics
involved, and the inherent properties of the material other than
D3641 Practice for Injection Molding Test Specimens of
those covered by this classification system.
Thermoplastic Molding and Extrusion Materials
1.4 The values stated in SI units are to be regarded as the D3892 Practice for Packaging/Packing of Plastics
standard.
D4000 Classification System for Specifying Plastic Materi-
als
1.5 The following precautionary caveat pertains only to the
D7209 Guide for Waste Reduction, Resource Recovery, and
test methods portion, Section 11, of this classification system.
Use of Recycled Polymeric Materials and Products (With-
This standard does not purport to address all of the safety
drawn 2015)
concerns, if any, associated with its use. It is the responsibility
E29 Practice for Using Significant Digits in Test Data to
of the user of this standard to establish appropriate safety,
Determine Conformance with Specifications
health, and environmental practices and determine the appli-
cability of regulatory limitations prior to use.
1 2
ThisclassificationsystemisunderthejurisdictionofASTMCommitteeD20on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Materials. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Sept. 1, 2022. Published September 2022. Originally the ASTM website.
approved in 1986. Last previous edition approved in 2016 as D4634 - 16. DOI: The last approved version of this historical standard is referenced on
10.1520/D4634-16R22. www.astm.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
D4634−16 (2022)
2.2 Military Standard: 4. Classification
MIL-STD-1916 DOD Preferred Methods for Acceptance of
4.1 Styrene-maleic anhydride materials are classified into
Product
groups according to their use either for injection molding, or
2.3 Underwriters Laboratories Standard:
for extrusion. These groups are subdivided into classes and
UL 94 Standard for Tests for Flammability for Parts in
grades, as shown in Table S/MA.
Devices and Appliances
NOTE 2—An example of this classification system is as follows: The
3. Terminology
designation S/MA 211 would indicate:
S/MA = Styrene-maleic anhydride,
3.1 The terminology used in this classification system is in
2 = injection-molding resin (group),
accordance with Terminologies D883 and D1600.
1 = general purpose (class),
1 = requirements given in Table S/MA (grade).
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
4.1.1 To facilitate the incorporation of future or special
Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
materials, the “other/unspecified” category (0) for group, class,
dodssp.daps.dla.mil.
5 and grade is shown inTable S/MA.The basic properties can be
Available from Underwriters Laboratories (UL), 333 Pfingsten Rd.,
Northbrook, IL 60062-2096, http://www.ul.com. obtained from Tables A and B as they apply (see 4.3).
TABLE S/MA Requirements for Natural Color Only
Izod Vicat
Flexural
Tensile
B
Modulus Impact Softening
A
Strength
C D
Group Description Class Description Grade Description (D790)
Strength Point
(D638) min,
min,
(D256) (D1525)
MPa
MPa
min, J/m min, °C
1 Crystal 1 general purpose 1 45 3000 10 120
0 other . . . .
2 high-heat resistant 1 45 2900 10 130
0 other . . . .
0 other 0 other . . . .
2 Impact-modified, 1 general purpose 1 40 2200 140 115
molding 2 33 2100 170 115
3 30 2000 200 115
0 other . . . .
2 high-impact 1 45 2200 500 115
2 34 2200 300 120
0 other . . . .
3 high-heat resistant 1 35 2500 120 135
2 33 2200 210 125
3 30 2200 80 125
0 other . . . .
4 plating 1 30 2000 150 120
0 other . . . .
5FR 1 28 1900 130 115
2 22 1800 70 115
0 other . . . .
0 other 0 other . . . .
3 Impact modified, 1 general purpose 1 40 2500 140 115
extrusion 2 35 2300 170 115
3 30 2200 200 115
0 other . . . .
2 high-heat resistant 1 33 2200 210 125
2 30 2200 80 125
0 other . . . .
3FR 1 28 1900 130 115
2 22 1800 70 115
0 other 0 other . . . .
0 Other 0 other 0 other . . . .
A
Tensile strength determined on 3.2-mm thick injection-molded D638, Type I specimen, tested at 5 mm/min.
B
Flexural modulus determined on centrally-loaded D638, Type I tensile bar, 2-in. span, tangent, Method 1, 1.3 mm/s.
C
Izod impact strength determined on 12.5 by 3.2-mm injection molded specimen. The specimen shall be obtained from the central section of a D638, Type I tensile bar.
D
Vicat softening point shall be 1-kg load, Rate B, 12.5 by 3.2-mm injection-molded specimen obtained from the central section of a D638, Type I tensile bar.
D4634−16 (2022)
TABLE A Detail Requirements for Reinforced S/MA Materials
Desig- Property Cell Limits
nation
0 1 2 3 456 7 8 9
Grade
A B
1 Tensile Strength D638, Unspecified 40 50 60 70 80 90 100 120
MPa, min
C B
2 Flexural Modulus D790, Unspecified 3500 4500 5500 6500 7500 8500 10 500 14 000
MPa, min
D B
3 Izod Impact Strength D256, Unspecified 20 50 100 150 200 250 300 350
J/m, min
B
4 Heat Deflection Unspecified 90 100 110 120 130 150 170 190
E
Temperature D648,°C, min
5 To be determined . . . . . . . . . .
A
Tensile strength shall be determined on 3.2-mm thick injection-molded D638, Type I specimen, tested at 5 mm/min.
B
Specific value appears on drawing or contract, or both.
C
Flexural modulus shall be determined on centrally-loaded D638, Type I tensile bar, 2-in. span, tangent, Method 1, 1.3 mm/s.
D
Izod impact strength shall be determined on 12.5 by 3.2-mm injection-molded specimen. The specimen shall be obtained from the central portion of a D638, Type I tensile
bar.
E
Heat-deflection temperature: 1.8-MPa load, 12.5 by 3.2-mm injection molded specimen.
TABLE B Detail Requirements for Unreinforced S/MA Materials
Desig-
nation Property 0 1 2 3 45678 9
Grade
A B
1 Tensile Strength D638, Unspecified 20 30 40 50 60 70 80 90
MPa, min
C B
2 Flexural Modulus D790, Unspecified 1800 2000 2200 2400 2600 2800 3000 3200
MPa, min
D B
3 Izod Impact Strength D256, Unspecified 20 50 100 150 200 250 300 350
J/m, min
B
4 Vicat Softening Unspecified 90 100 110 120 130 150 170 190
E
Temperature D1525, °C, min
5 To be determined . . . . . . . . . .
A
Tensile strength determined on 3.2-mm thick injection-molded D638, Type I specimen, tested at 5 mm/min.
B
Specific value appears on drawing or contract, or both.
C
Flexural modulus determined on a centrally-loaded D638, Type I tensile bar, 2-in. span, tangent, Method 1, 1.3 mm/s.
D
Izod impact strength determined on 12.5 by 3.2-mm injection-molded specimen. The specimen shall be obtained from the central portion of a D638, Type 1 tensile bar.
E
Vicat softening point shall be 1-kg load, Rate B, 12.5 by 3.2-mm injection-molded specimen obtained from the central section of a D638, Type I tensile bar.
4.2 Reinforced versions of the materials are classified in The designation shall consist of the letter A and the five digits
accordance with Table A. comprising the cell numbers for the property requirements in
4.2.1 A single letter shall be used for the major reinforce- the order
...
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