1、Designation: D5436 15Standard Specification forCast Poly(Methyl Methacrylate) Plastic Rods, Tubes, andShapes1This standard is issued under the fixed designation D5436; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of las
2、t revision. A number in parentheses indicates the year of last reapproval. Asuperscript 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 specification covers poly(met
3、hyl methacrylate)rods, tubes, and other shapes produced by casting or machiningcast blanks. This specification does not apply to heat-formedand molded or extruded parts and shapes, or sections that aremade by assembling or joining two or more pieces.NOTE 1The properties included in this specificatio
4、n are those requiredto identify the types and grades of materials covered. There may be otherrequirements necessary to identify particular characteristics.1.2 The values stated in SI units are to be regarded asstandard.1.3 This standard does not purport to address all of thesafety concerns, if any,
5、associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.NOTE 2There is no known ISO equivalent to this standard.2. Referenced Documents2.1 ASTM Standard
6、s:2D542 Test Method for Index of Refraction of TransparentOrganic PlasticsD570 Test Method for Water Absorption of PlasticsD618 Practice for Conditioning Plastics for TestingD638 Test Method for Tensile Properties of PlasticsD648 Test Method for Deflection Temperature of PlasticsUnder Flexural Load
7、in the Edgewise PositionD792 Test Methods for Density and Specific Gravity (Rela-tive Density) of Plastics by DisplacementD883 Terminology Relating to PlasticsD1003 Test Method for Haze and Luminous Transmittanceof Transparent PlasticsD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD3892
8、 Practice for Packaging/Packing of PlasticsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications3. Terminology3.1 The terminology used in this specification is in accor-dance with Terminology D883 and Terminology D1600.4. Classification4.1 TypesThis speci
9、fication covers two types of castmethacrylate plastics:4.1.1 Type UVAMaterial having ultraviolet-lightabsorbingproperties as shown in Table 1.4.1.2 Type UVTMaterial not subject to the light-absorbingproperties shown in Table 1.4.2 FinishCastings may be specified with the followingfinishes:4.2.1 Fini
10、sh 1Rods, tubes, and shapes having a smoothsurface finish obtained either in the casting process or byhighly polishing the surface.4.2.2 Finish 2Rods, tubes, and shapes having a rough,unfinished surface which may be frosted, abraded, sanded,machined, or as-cast.NOTE 3The sawed ends of Finish 1 and F
11、inish 2 rods, tubes, andshapes are not polished.5. General Requirements5.1 Finish 1 and Finish 2 cast tubes are subject to thefollowing permissible variations from the specified dimen-sions:5.1.1 Cast tubes shall be specified with either Type A orType B wall thickness tolerances as listed in Table 2
12、. Type Atolerances are specified for applications where wall thickness iscritical to performance, otherwise Type B is generally speci-fied.5.1.2 Cast tubes are subject to the outside-diameter toler-ances listed in Table 3.1This specification is under the jurisdiction of ASTM Committee D20 onPlastics
13、 and is the direct responsibility of Subcommittee D20.15 on ThermoplasticMaterials.Current edition approved June 1, 2015. Published July 2015. Originally approvedin 1993. Last previous edition approved in 2013 as D5436 13. DOI: 10.1520/D5436-15.2For referenced ASTM standards, visit the ASTM website,
14、 www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive
15、, PO Box C700, West Conshohocken, PA 19428-2959. United States15.1.3 Cut-to-size lengths of cast tube are subject to thelength tolerances listed in Table 4.5.2 Finish 1 and Finish 2 cast rods are subject to thefollowing dimensions and tolerances.5.2.1 Cast rods are subject to the diameter tolerances
16、 listedin Table 5.5.2.2 Cut-to-size lengths of cast rod are subject to the lengthtolerances listed in Table 4.5.3 Tolerances for shapes other than simple rods and tubesdepend upon the shapes themselves. Tolerances for these castshapes are to be specified independently.6. Detail Requirements6.1 The f
17、ollowing applies to all specified limits in thisspecification: For purposes of determining conformance withthis specification an observed value or a calculated value shallbe rounded to the nearest 1 MPa (100 psi) for tensile strength,and for all other properties shall be rounded to the nearest uniti
18、n the last righthand place of figures used in expressing thelimiting value, in accordance with the rounding method ofPractice E29.6.2 The physical and optical properties in this specificationare based on Finish 1 material unless otherwise specified.6.3 Rods, tubes, and shapes shall conform to the de
19、tailrequirements prescribed in Table 1 and, in addition, shall be soprepared as to conform to the following properties:6.3.1 Bubbles or inclusions in cast rods, tubes, and shapesshall not exceed 3.96 mm (0.156 in.) in any dimension. Nomore than three such defects are permissible in any standardlengt
20、h greater than 122 cm (48 in.), or an outside diametergreater than 76.2 mm (3 in.). Bubbles or inclusions are notpermitted in rods, tubes, or shapes less than 122 cm (48 in.) inlength and less than 76.2 mm (3 in.) in outside diameter.Defects less than 1 mm (0.039 in.) shall be disregarded, unlessgro
21、uped to form an objectionable pattern.7. Number of Tests7.1 The number of tests shall be consistent with the require-ments of Sections 8 and 10.8. Sampling and Specimen Preparation8.1 Sampling shall be statistically adequate to satisfy therequirements of Section 10.8.2 In the case of rods, tubes, or
22、 special shapes from whichthe required test specimens cannot be cut, the test specimensTABLE 1 Detail Requirements for Cast Methacrylate Rods, Tubes,and ShapesType UVA Type UVTIndex of refraction, nD,23Cmin: 1.48 1.48max: 1.50 1.50Specific gravity, 23/23 C (73.4/73.4F)min: 1.18 1.18max: 1.20 1.20Spe
23、ctral transmittance, %, max270 nm: 5 .280 nm: 5 .290 nm: 5 .310 nm: 5 .340 nm: 5 .Luminous transmittance, %, minup to 4.7 mm (0.187 in.) thickness: 91 9125.4 mm (1.00 in.) thickness: 89 89greater than 25.4 mm (1.00 in.) thickness: 87 87Haze, %, max 3.0 3.0Deflection temperature under load at 1820kPa
24、 (264 psi), C (F) min.12.0 mm (0.472 in.)24.0 mm (0.944 in.) 88 (190.4) 88 (190.4)24.0 mm (0.944 in.)100 mm (3.937 in.) 93 (199.4) 93 (199.4)Water absorption at 23 CGain in weight, 3.2 mm (0.125 in.) thick, %,max0.8 0.8Tensile strength at 23 C (73.4F), min, MPa(psi)55 (8000) 55 (8000)Elongation at b
25、reak, %, min 2 2TABLE 2 Sizes and Permissible Tolerances for Wall Thickness ofCast TubeNominal Wall Thickness,mm (in.)Permissible Wall Thickness Tolerances, mm (in.)Type A Type Bup to 4.7 (0.187) 0.5 (0.020) not applicableup to 6.4 (0.250) 0.6 (0.025) 1.1 (0.045)up to 9.5 (0.375) 0.9 (0.035) 1.4 (0.
26、055)up to 12.7 (0.550) 1.1 (0.045) 1.5 (0.060)up to 19.0 (0.750) 1.5 (0.060) 2.3 (0.090)up to 25.4 (1.00) 3.8 (0.150) not applicablegreater than 25.4 (1.00) 6.4 (0.250) not applicableTABLE 3 Sizes and Permissible Tolerances for Outside Diameterof Cast TubesNominal OutsideDiameter,mm (in.)Outside Dia
27、meterTolerances, mm (in.)Difference BetweenMaximum and MinimumOutside Diameter (OneTube), Not to Exceed,mm (in.)up to 76.2 (3.0) 0.5 (0.020) 0.6 (0.025)up to 98.4 (3.875) 0.8 (0.030) 1.0 (0.040)up to 152.4 (6.00) 1.1 (0.045) 1.5 (0.060)up to 304.8 (12.00) 1.6 (0.065) 2.0 (0.080)greater than 304.8 (1
28、2.00) 3.2 (0.125) not applicableTABLE 4 Sizes and Permissible Length Tolerances for Cut-to-Length Cast Rod and TubeNominal OutsideDiameter,mm (in.)Permissible LengthTolerances, mm (in.)up to 76 (3.0) 2 (0.079)up to 280 (11.0) 3 (0.118)greater than 280 (11.0) 6 (0.236)TABLE 5 Size and Permissible Tol
29、erances for Diameter of CastRodsSize, Diameter, mm (in.)Diameter Tolerances, mm (in.)up to 9.5 (0.375) 0.1 (0.005)up to 25.4 (1.00) 0.2 (0.010)up to 50.8 (2.00) 0.4 (0.015)up to 76.2 (3.00) 0.8 (0.030)up to 152.4 (6.00) 1.1 (0.045)up to 304.8 (12.00) 1.5 (0.060)greater than 304.8 (12.00) 2.5 (0.100)
30、D5436 152shall be prepared specially from the same raw materials andunder conditions simulating the manufacture of the special sizeor shape. Otherwise a unit of the manufactured product shall beused for testing.8.3 A batch or lot shall be constituted as a unit of manufac-ture as prepared for shipmen
31、t, and shall consist of product fromone or more production runs.9. Test Methods9.1 The properties enumerated in this specification shall bedetermined in accordance with the following test methods:9.1.1 Test ConditionsConduct the tests in the standardlaboratory atmosphere of 23 6 2.0 C (73.4 6 3.6F)
32、and 50 610 % relative humidity, unless otherwise specified in the testmethods or in this specification.9.1.2 Index of RefractionTest in accordance with TestMethods D542, using one of the exposed surfaces of the testspecimen that has been given any necessary polish withoutgross removal of material.9.
33、1.3 Specific GravityTest in accordance with Method Aof Test Methods D792.9.1.4 Water AbsorptionTest in accordance with TestMethod D570, using the 24-h immersion procedure. Beforetesting and following immersion, condition the test specimensfor 24 h at 50 6 3C (112 6 5F) in accordance withProcedure B
34、of Practice D618.9.1.5 Defection Temperature Under Flexural LoadTest inaccordance with Test Method D648. Any square, rectangular,or cylindrical test specimen is allowed, but calculate the testload used on the basis of a center-loaded beam in which theouter fiber stress produced is 1820 kPa (264 psi)
35、. Stack andbind together pieces of thin sheet, 12.7 mm (0.500 in.) inwidth, to form a test specimen approximately 12.7 by 12.7 mm(0.500 by 0.500 in.). Load the specimen parallel to the facescontaining the original surfaces of the material. Specimens12.7 by 12.7 mm (0.500 by 0.500 in.) machined from
36、the faceof thick material shall be loaded parallel to the face containingthe original surface.9.1.6 Tensile Strength and Elongation at BreakTest inaccordance with Test Method D638 using Type I or Type IIspecimens at a cross-head speed of 5 mm/min (0.2 in./min).9.1.7 Spectral TransmittanceMeasure the
37、 spectral trans-mittance at each specified wavelength with a suitable spectro-photometer.9.1.8 Light TransmittanceTest in accordance with TestMethod D1003.9.1.9 HazeTest in accordance with Test Method D1003.10. Certification and Inspection10.1 When specified in the purchase order or contract, thepur
38、chaser shall be furnished certification that samples repre-senting each lot have been either tested or inspected as directedin this specification and the requirements have been met. Whenspecified in the purchase order or contract, a report of the testresults shall be furnished.10.2 Lot-acceptance in
39、spection shall be the basis on whichacceptance or rejection of the lot is made. The lot-acceptanceinspection shall consist of (1) thickness and dimensions, (2)appearance, and (3) deflection temperature.10.3 Periodic check inspection shall consist of the testsspecified for all requirements of the mat
40、erial under thisspecification. Supplier shall determine and use an inspectionfrequency which shall be adequate to ensure that the materialis certifiable in accordance with 10.4.10.4 Certification shall be that the material wasmanufactured, sampled, tested, and inspected in accordancewith this specif
41、ication and that average values meet therequirements at a confidence level of 95 %.10.5 Any report made in accordance with 10.1 shall consistof the results of the lot-acceptance inspection of the shipmentand the results of the most recent periodic-check inspection.11. Packaging and Marking11.1 All p
42、acking, packaging, and marking provisions ofPractice D3892 shall apply to this specification.12. Keywords12.1 acrylic; acrylic plastic; cast acrylic; clear weatherableplastics; plastic; plastic materials; plastic rods; plastic shapes;plastic tubes; PMMA; poly(methyl methacrylate); rods;shapes; trans
43、parent; tubesSUMMARY OF CHANGESCommittee D20 has identified the location of selected changes to this standard since the last issue (D5436 13) that may impact the use of this standard. (June 1, 2015)(1) Updated tolerances on temperature and humidity in 9.1.1 tobe consistent with Practice D618, Table
44、1.D5436 153ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such
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