1、Designation: D4634 11aStandard Classification System and Basis for Specification forStyrene-Maleic Anhydride Molding and Extrusion Materials(S/MA)1This standard is issued under the fixed designation D4634; the number immediately following the designation indicates the year oforiginal adoption or, in
2、 the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This classification system covers styrene-maleic anhy-dride materials suitable for
3、 molding or extrusion. This classi-fication system does not apply to alloys or blends of styrene-maleic anhydride materials with non-elastomericthermoplastics. Styrene-maleic anhydride materials, beingthermoplastic, are reprocessable and recyclable. This classifi-cation system allows for the use of
4、those materials providedthat all the specific requirements of this classification systemare met.1.2 The properties included in this standard are thoserequired to identify the compositions covered. Other require-ments necessary to identify particular characteristics importantto specialized applicatio
5、ns are to be specified by using thesuffixes as given in Section 5.1.3 This classification system and subsequent line call out(specification) are intended to provide means of calling outproperties of plastic materials used in the fabrication of enditems or parts. It is not intended for the selection
6、of materials.Materials should be selected by those having expertise in theplastics field after careful consideration of the design and theperformance required of the part, the environment to which itwill be exposed, the fabrication process to be employed, costsinvolved, and the inherent properties o
7、f the material other thanthose covered by this classification system.1.4 The values stated in SI units are to be regarded as thestandard.1.5 The following precautionary caveat pertains only to thetest methods portion, Section 11, of this classification system.This standard does not purport to addres
8、s all of the safetyconcerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety andhealth practices and determine the applicability of regulatorylimitations prior to use.NOTE 1There is no known ISO equivalent to this standard.2. Refe
9、renced Documents2.1 ASTM Standards:2D256 Test Methods for Determining the Izod PendulumImpact Resistance of PlasticsD618 Practice for Conditioning Plastics for TestingD638 Test Method for Tensile Properties of PlasticsD648 Test Method for Deflection Temperature of PlasticsUnder Flexural Load in the
10、Edgewise PositionD790 Test Methods for Flexural Properties of Unreinforcedand Reinforced Plastics and Electrical Insulating MaterialsD883 Terminology Relating to PlasticsD1525 Test Method for Vicat Softening Temperature ofPlasticsD1600 Terminology for Abbreviated Terms Relating toPlasticsD3641 Pract
11、ice for Injection Molding Test Specimens ofThermoplastic Molding and Extrusion MaterialsD3892 Practice for Packaging/Packing of PlasticsD4000 Classification System for Specifying Plastic Materi-alsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications2.2 M
12、ilitary Standard:3MIL-STD-1916 DOD Preferred Methods for Acceptance ofProduct2.3 Underwriters Laboratories Standard:4UL 94 Standard for Tests for Flammability for Parts inDevices and Appliances1This classification system is under the jurisdiction ofASTM Committee D20 onPlastics and is the direct res
13、ponsibility of Subcommittee D20.15 on ThermoplasticMaterials.Current edition approved Sept. 1, 2011. Published September 2011. Originallyapproved in 1986. Last previous edition approved in 2011 as D4634 - 11. DOI:10.1520/D4634-11A.2For referenced ASTM standards, visit the ASTM website, www.astm.org,
14、 orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, ht
15、tp:/dodssp.daps.dla.mil.4Available from Underwriters Laboratories (UL), 333 Pfingsten Rd., North-brook, IL 60062-2096, http:/.1*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
16、States.3. Terminology3.1 The terminology used in this classification system is inaccordance with Terminologies D883 and D1600.4. Classification4.1 Styrene-maleic anhydride materials are classified intogroups according to their use either for injection molding, orfor extrusion. These groups are subdi
17、vided into classes andgrades, as shown in Table S/MA.NOTE 2An example of this classification system is as follows: Thedesignation S/MA 211 would indicate:S/MA = Styrene-maleic anhydride,2 = injection-molding resin (group),1 = general purpose (class),1 = requirements given in Table S/MA (grade).4.1.1
18、 To facilitate the incorporation of future or specialmaterials, the “other/unspecified” category (0) for group, class,and grade is shown in Table S/MA. The basic properties can beobtained from Tables A and B as they apply (see 4.3).TABLE S/MA Requirements for Natural Color OnlyGroup Description Clas
19、s Description Grade DescriptionTensileStrengthA(D638) min,MPaFlexuralModulusB(D790)min,MPaIzodImpactStrengthC(D256)min, J/mVicatSofteningPointD(D1525)min, C1 Crystal 1 general purpose 10 other45.3000.10.120.2 high-heat resistant 1 45 2900 10 1300 other . . . .0 other 0 other . . . .2 Impact-modified
20、,molding1 general purpose 1230 other403330.220021002000.140170200.115115115.2 high-impact 120 other4534.22002200.500300.115120.3 high-heat resistant 1230 other353330.250022002200.12021080.135125125.4 plating 10 other30.2000.150.120.5FR 120 other2822.19001800.13070.115115.0 other 0 other . . . .3 Imp
21、act modified,extrusion1 general purpose 1230 other403530.250023002200.140170200.115115115.2 high-heat resistant 120 other3330.22002200.21080.125125.3FR 12282219001800130701151150 other 0 other . . . .0 Other 0 other 0 other . . . .ATensile strength determined on 3.2-mm thick injection-molded D638, T
22、ype I specimen, tested at 5 mm/min.BFlexural modulus determined on centrally-loaded D638, Type I tensile bar, 2-in. span, tangent, Method 1, 1.3 mm/s.CIzod 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
23、I tensile bar.DVicat 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 11a2TABLE A Detail Requirements for Reinforced S/MA MaterialsDesig-nationGradeProperty Cell Limits0 1234567891 Tensile Stren
24、gthAD638,MPa, minUnspecified 40 50 60 70 80 90 100 120B2 Flexural ModulusCD790,MPa, minUnspecified 3500 4500 5500 6500 7500 8500 10 500 14 000B3 Izod Impact StrengthDD256,J/m, minUnspecified 20 50 100 150 200 250 300 350B4 Heat DeflectionTemperatureED648,C, minUnspecified 90 100 110 120 130 150 170
25、190B5 To be determined . . . . . . . . . .ATensile strength shall be determined on 3.2-mm thick injection-molded D638, Type I specimen, tested at 5 mm/min.BSpecific value appears on drawing or contract, or both.CFlexural modulus shall be determined on centrally-loaded D638, Type I tensile bar, 2-in.
26、 span, tangent, Method 1, 1.3 mm/s.DIzod 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 Itensile bar.EHeat-deflection temperature: 1.8-MPa load, 12.5 by 3.2-mm injection molded specimen.TABLE B
27、Detail Requirements for Unreinforced S/MA MaterialsDesig-nationGradeProperty 0 1234567891 Tensile StrengthAD638,MPa, minUnspecified 20 30 40 50 60 70 80 90B2 Flexural ModulusCD790,MPa, minUnspecified 1800 2000 2200 2400 2600 2800 3000 3200B3 Izod Impact StrengthDD256,J/m, minUnspecified 20 50 100 15
28、0 200 250 300 350B4 Vicat Softening TemperatureED1525, C, minUnspecified 90 100 110 120 130 150 170 190B5 To be determined . . . . . . . . . .ATensile strength determined on 3.2-mm thick injection-molded D638, Type I specimen, tested at 5 mm/min.BSpecific value appears on drawing or contract, or bot
29、h.CFlexural modulus determined on a centrally-loaded D638, Type I tensile bar, 2-in. span, tangent, Method 1, 1.3 mm/s.DIzod 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 tensilebar.EVicat softening p
30、oint 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 inaccordance with Table A.4.2.1 A single letter shall be used for the major reinforce-ment or combination,
31、 or both, along with two numbers whichindicate the percentage of addition by mass with the tolerancesas tabulated as follows:Symbol Material ToleranceC carbon 62%G glass-reinforced 62%L lubricants (for example, PTFE)graphite, silicone, and molybdenumdisulfideBy agreement between sup-plier and userM
32、mineral-reinforced 62%R combinations of reinforcements orfillers, or both63 % for total reinforce-mentNOTE 3This part of the system uses percent of reinforcements oradditives, or both, in the control of the modified basic material. The typesand percentages of reinforcements and additives should be s
33、hown on thesuppliers technical data sheet unless this information is proprietary innature. If necessary, additional control of these reinforcements andadditives can be accomplished by the use of the suffix part of the system,Section 5.4.2.2 Specific requirements for reinforced, filled, or lubri-cate
34、d materials shall be shown by a six-character designation.The designation shall consist of the letter A and the five digitscomprising the cell numbers for the property requirements inthe order in which they appear in Table A.4.2.2.1 Although the values listed are necessary to includethe range of pro
35、perties available in existing materials, usersshould not infer that every possible combination of theproperties exists or can be obtained.4.2.3 When the grade of the basic material is not known, oris not important, the use of “0” grade classification shall beused for reinforced materials in this sys
36、tem.NOTE 4An example of a reinforced styrene-maleic anhydride of thisclassification system is as follows: The designation S/MA210G30A22450would indicate the following, with the material requirements from TableA:S/MA 210 = Styrene-maleic anhydride, molding resin, general-purposeG30 = Glass reinforced
37、 at 30 % nominal (see 4.2.1),A = Table A for Property Requirements,2 = 30 MPa Tensile Strength, min,2 = 2000 MPa Flexural Modulus, min,4 = 150 J/M Izod Impact Strength, min,5 = 130C Heat-Deflection Temperature, min, and0 = Unspecified.If no properties are specified, the designation would be S/MA 210
38、G30A00000.D4634 11a34.3 Table B has been incorporated into this specification tofacilitate the classification of special materials where TableS/MA or Table A does not reflect the required properties. TableB shall be used in the same manner as Table A.NOTE 5An example of a special material using this
39、 classificationsystem is as follows: The designation S/MA310B54220 would indicatethe following, with the material requirements from Table B.S/MA 310 = Styrene-maleic anhydride, extrusion resin, general-purpose,B = Table B Property Requirements,5 = 60 MPa Tensile Strength, min,4 = 2400 MPa Flexural M
40、odulus, min,2 = 50 J/m Izod Impact Strength, min,2 = 100C Vicat Softening Point, min, and0 = Unspecified.NOTE 6Mechanical properties of pigmented or colored S/MA mate-rials can differ from the mechanical properties of natural S/MA material,depending on the choice of colorants and the concentration.
41、The mainproperty affected is ductility, as illustrated by a reduction in Izod impactstrength and tensile elongation values. If specific properties of pigmentedS/MA materials are necessary, prior testing between the materials supplierand end user should be initiated. Once these agreements are reached
42、, aclassification using Table B should be employed to ensure proper propertycompliance.5. Suffixes5.1 When requirements are needed that are not covered inTable S/MA they shall be indicated through the use of suffixes.5.2 A list of suffixes can be found in Classification SystemD4000 (Table 3) and are
43、 to be used for additional requirementsas appropriate. Additional suffixes will be added to thatclassification system as test methods and requirements aredeveloped and requested.6. Basic Requirements6.1 Basic requirements from property or cell tables, as theyapply, are always in effect unless these
44、requirements aresuperseded by specific suffix requirements, which always takeprecedence.7. General Requirements7.1 The material composition shall be uniform and shallconform to the requirements specified herein. The color andform of the material shall be as specified in the purchase orderor contract
45、. Specification changes due to the effects of colo-rants shall be noted by both parties and, where necessary,covered by suffixes.8. Detail Requirements8.1 Test specimens and testing parameters for the variousmaterials shall conform to the requirements prescribed inTables S/MA, A, and B, and suffix r
46、equirements as they apply.8.2 For purposes of determining conformance, all specifiedlimits for a specification (line callout) based on this classifica-tion system are absolute limits, as defined in Practice E29.8.3 With the absolute method, an observed value or acalculated value is not rounded, but
47、is to be compared directlywith the limiting value. Conformance or nonconformance isbased on this comparison.9. Sampling9.1 The materials shall be sampled in accordance with asampling procedure statistically adequate to satisfy the require-ments of 12.4. A lot of resin shall be considered as a unit o
48、fmanufacture as prepared for shipment and is allowed to consistof a blend of two or more “production runs” or batches ofmaterial.10. Specimen Preparation10.1 Physical property requirements in Table S/MA arebased on injection molded specimens 3.2 mm thick. Testspecimens shall be molded in accordance
49、with Practice D3641.10.2 Group 3 (extrusion) materials may be compressionmolded or machined from extruded sheet.11. Test Methods11.1 The following specimen conditioning and test methodsare required:11.2 Condition test specimens in standard laboratory atmo-sphere in accordance with Procedure A (40/23/50) of PracticeD618 before performing the required tests. Specimens will notbe annealed.11.3 Perform all tests in the standard laboratory atmosphere(23/50) in accordance with Practice D618.11.4 Tensile Strength (Maximum Stress)Test MethodD638, Type 1, 3.2 mm, at
