ASTM D4634 - 11a

    Standard Classification System and Basis for Specification for Styrene-Maleic Anhydride Molding and Extrusion Materials (S/MA)

    Active Standard ASTM D4634 | Developed by Subcommittee: D20.15

    Book of Standards Volume: 08.02


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    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.

    This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

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

    Note 1—There 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

    D256 Test Methods for Determining the Izod Pendulum Impact Resistance of Plastics

    D618 Practice for Conditioning Plastics for Testing

    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

    D883 Terminology Relating to Plastics

    D1525 Test Method for Vicat Softening Temperature of Plastics

    D1600 Terminology for Abbreviated Terms Relating to Plastics

    D3641 Practice for Injection Molding Test Specimens of Thermoplastic Molding and Extrusion Materials

    D3892 Practice for Packaging/Packing of Plastics

    D4000 Classification System for Specifying Plastic Materials

    E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications

    Military Standard

    MIL-STD-1916 DOD Preferred Methods for Acceptance of Product


    ICS Code

    ICS Number Code 83.080.20 (Thermoplastic materials)

    UNSPSC Code

    UNSPSC Code 13111054(Styrene maleic anhydride)


    DOI: 10.1520/D4634-11A

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