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ASTM F484-02

(Test Method)

Standard Test Method for Stress Crazing of Acrylic Plastics in Contact with Liquid or Semi-Liquid Compounds

Standard Test Method for Stress Crazing of Acrylic Plastics in Contact with Liquid or Semi-Liquid Compounds

SCOPE
1.1 This test method covers determination of the crazing effect that a liquid or semi-liquid test compound will have on transparent acrylic plastic material that is under bending stress.
1.2 Three types of acrylic material are covered. One, two, or all of the materials shall be used in the test, as specified by the procuring agency. When not specified otherwise, all three types of acrylic shall be used in the test.
1.3 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.

General Information

Status
Historical
Publication Date
09-May-2002
ICS
83.080.10 - Thermosetting materials
Technical Committee
F07 - Aerospace and Aircraft
Drafting Committee
F07.07 - Qualification Testing of Aircraft Cleaning Materials
Current Stage
Ref Project

Relations

Replaces
ASTM F484-83(1998)e1 - Standard Test Method for Stress Crazing of Acrylic Plastics in Contact with Liquid or Semi-Liquid Compounds
Effective Date
10-May-2002
Replaced By
ASTM F484-08 - Standard Test Method for Stress Crazing of Acrylic Plastics in Contact with Liquid or Semi-Liquid Compounds
Effective Date
01-Apr-2008
Referred By
ASTM F790-23 - Standard Guide for Testing Materials for Aerospace Plastic Transparent Enclosures
Effective Date
10-May-2002
Referred By
ASTM D6361/D6361M-98(2020) - Standard Guide for Selecting Cleaning Agents and Processes
Effective Date
10-May-2002

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ASTM F484-02 - Standard Test Method for Stress Crazing of Acrylic Plastics in Contact with Liquid or Semi-Liquid CompoundsASTM F484-02 - Standard Test Method for Stress Crazing of Acrylic Plastics in Contact with Liquid or Semi-Liquid Compounds
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ASTM F484-02 - Standard Test Method for Stress Crazing of Acrylic Plastics in Contact with Liquid or Semi-Liquid Compounds
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:F484–02
Standard Test Method for
Stress Crazing of Acrylic Plastics in Contact with Liquid or
1
Semi-Liquid Compounds
This standard is issued under the fixed designation F 484; 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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 4. Types
1.1 This test method covers determination of the crazing 4.1 Type A, cast acrylic material shall conform to MIL-PRF-
effect that a liquid or semi-liquid test compound will have on 5425, Finish A.
transparent acrylic plastic material that is under bending stress. 4.2 Type B, cast acrylic material shall conform to MIL-PRF-
1.2 Threetypesofacrylicmaterialarecovered.One,two,or 8184, Finish B.
all of the materials shall be used in the test, as specified by the 4.3 Type C, stretched acrylic material shall conform to
procuringagency.Whennotspecifiedotherwise,allthreetypes MIL-P-25690.
of acrylic shall be used in the test.
5. Apparatus
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 5.1 Stress Apparatus—The means of stressing the acrylic
plastic test specimen bars shall be as shown in Fig. 1.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
6. Test Specimens
bility of regulatory limitations prior to use.
6.1 The test specimens shall be machined from 0.25 6
2. Referenced Documents
0.025 in. (6.4 6 0.64 mm) thick polished acrylic plastic sheet
conforming to the applicable specification.
2.1 ASTM Standards:
2
D 1193 Specification for Reagent Water 6.2 The test specimens shall be 1 6 0.03 in. (25.4 6 0.8
mm) wide by 7 6 0.05 in. (177.8 6 1.27 mm) long by 0.25 6
2.2 Military Standards:
3
0.025 in. (6.4 6 0.64 mm) thick. Edges shall be a smooth
MIL-PRF-5425 Plastic Sheet, Acrylic, Heat Resistant
3
MIL-PRF-8184 Plastic Sheet, Acrylic, Modified machined surface without cracks.
MIL-P-25690 Plastic, Sheets and Formed Parts, Modified
7. Conditioning
3
Acrylic-Basic, Monolithic, Crack Propagation Resistant
7.1 Do not anneal Type C acrylic specimens.
3. Terminology
7.2 Anneal Type A and Type B acrylic test specimens after
3.1 Definitions: machiningbyheatinginacirculatingairovenat195 65°F(91
1
6 3°C) for 5 ⁄2 h. Cool the specimens to room temperature in
3.1.1 craze—a minute surface crack, sometimes hairline in
size. the oven using a uniform cooling rate of 50°F (28°C)/h.
7.3 Condition all specimens at 75 6 10°F and 50 6 5%
NOTE 1—Hairline craze cracks are very difficult to see except with
relative humidity for a minimum of 24 h just before testing.
careful inspection under properly oriented light.
3.1.2 crack—a fracture or tear. 8. Procedure
8.1 Testtwospecimensofeachacrylicmaterialspecifiedfor
each of the test compounds being evaluated.
1
This test method is under the jurisdiction of ASTM Committee F07 on
8.2 Conduct the test at a temperature of 75 6 10°F (23 6
Aerospace and Aircraft and is the direct responsibility of Subcommittee F07.07 on
Qualification Testing of Aircraft Cleaning Materials. 5°C).
Current edition approved May 10, 2002. Published July 2002. Originally
8.3 Carefully load the acrylic specimen as a cantilever beam
e1
published as F 484 – 77. Last previous edition F 484 – 83 (1998) .
as shown in Fig. 1. Unless otherwise specified, the following
2
Annual Book of ASTM Standards, Vol 11.01.
3
are recommended stress levels:
AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
Robbins Ave., Philadelphia, PA 19111-5098, Attn: NPODS.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
F484
Load: outer fiber stress 3000 psi (20 685 kPa) Type A acrylic
outer fiber stress 3500 psi (24 132 kPa) Type B acrylic
outer fiber stress 4500 psi (31 027 kPa) Type C acrylic
stress in psi
Formula:
2
load, lb 5 w 3 t 3
24
stress in kPa
2
load, g 5 w 3 t 3
5930
where:
w = width of specimen in inches or millimetres to nearest 0.001 in. or 0.025 mm, respectively, and
t = thickness of specimen in inches or millimetres to nearest 0.001 in. or 0.025 mm, respectively. Width and thickness shall be measured
at the stress area.
1
Note: The fulcrum radius shall be ⁄4 in. (6.4 mm) where it bears on the acrylic specimen.
FIG. 1 Description of Stressing Procedure
8.3.1 Type A specimens shall be stressed to an outer fiber D 1193, Type IV water may be used to remove dry residue if
stress of 3000 psi (20 685 kPa). necessary in the cleaning operatio
...

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