ASTM F520-10

Standard Test Method for Environmental Resistance of Aerospace Transparencies

SIGNIFICANCE AND USE
This test method, when applied to aerospace transparencies of either monolithic glass/plastic or laminated combinations, is a measure of the ability of the transparency to withstand the effects of artificially induced environments. The test may be used on configurations employing electrically conductive coatings, and also to evaluate the integrity of noncoated materials.
The resistance of the transparent enclosure to environmental effects may vary appreciably depending on the size, geometry, material of construction, coating integrity, coating density, and other factors.
SCOPE
1.1 This test method covers determination of the effects of exposure to thermal shock, condensing humidity, and simulated weather on aerospace transparent enclosures.
1.2 This test method is not recommended for quality control nor is it intended to provide a correlation to actual service life.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3.1 Exceptions—Certain inch-pound units are furnished in parentheses (not mandatory) and certain temperatures in Fahrenheit associated with other standards are also furnished.
1.4 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: 30-Apr-2010
• ICS: 49.045 - Structure and structure elements
• Technical Committee: F07 - Aerospace and Aircraft
• Drafting Committee: F07.08 - Transparent Enclosures and Materials

Relations

• Replaces: ASTM F520-97(2004) - Standard Test Method for Environmental Resistance of Aerospace Transparencies
• Effective Date: 01-May-2010
• Referred By: ASTM F942-18(2023)e1 - Standard Guide for Selection of Test Methods for Interlayer Materials for Aerospace Transparent Enclosures
• Effective Date: 01-May-2010
• Referred By: ASTM F790-23 - Standard Guide for Testing Materials for Aerospace Plastic Transparent Enclosures
• Effective Date: 01-May-2010

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:F520 −10
StandardTest Method for
Environmental Resistance of Aerospace Transparencies to
1
Artificially Induced Exposures
ThisstandardisissuedunderthefixeddesignationF520;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
3
1. Scope sure of Nonmetallic Materials (Withdrawn 2000)
G113Terminology Relating to Natural andArtificialWeath-
1.1 This test method covers determination of the effects of
ering Tests of Nonmetallic Materials
exposure to thermal shock, condensing humidity, and simu-
G151PracticeforExposingNonmetallicMaterialsinAccel-
lated weather on aerospace transparent enclosures.
erated Test Devices that Use Laboratory Light Sources
1.2 Thistestmethodisnotrecommendedforqualitycontrol
G154PracticeforOperatingFluorescentLightApparatusfor
nor is it intended to provide a correlation to actual service life.
UV Exposure of Nonmetallic Materials
1.3 The values stated in SI units are to be regarded as
3. Summary of Test Method
standard. No other units of measurement are included in this
standard.
3.1 Two types of test specimens, duplicating the aerospace
1.3.1 Exceptions—Certaininch-poundunitsarefurnishedin
transparent enclosure design, are subjected to thermal shock,
parentheses (not mandatory) and certain temperatures in Fahr-
condensing humidity, and artificial weathering. Edge sealing
enheit associated with other standards are also furnished.
may be used if representative of the design.
3.1.1 Type A specimens are used to determine the effect of
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the environmental exposure on electrical and optical properties.
3.1.2 Type B specimens are used to determine the effect of
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- environmental exposure on bond integrity.
bility of regulatory limitations prior to use.
4. Significance and Use
2. Referenced Documents
4.1 This test method, when applied to aerospace transpar-
2
encies of either monolithic glass/plastic or laminated
2.1 ASTM Standards:
combinations,isameasureoftheabilityofthetransparencyto
D1003Test Method for Haze and Luminous Transmittance
withstand the effects of artificially induced environments. The
of Transparent Plastics
test may be used on configurations employing electrically
D4329Practice for Fluorescent UV Exposure of Plastics
conductive coatings, and also to evaluate the integrity of
F319Practice for Polarized Light Detection of Flaws in
noncoated materials.
Aerospace Transparency Heating Elements
F521Test Methods for Bond Integrity of Transparent Lami-
4.2 The resistance of the transparent enclosure to environ-
nates
mental effects may vary appreciably depending on the size,
F790Guide for Testing Materials for Aerospace Plastic
geometry, material of construction, coating integrity, coating
Transparent Enclosures
density, and other factors.
G53Practice for Operating Light-and Water-Exposure Ap-
paratus (Fluorescent UV-Condensation Type) for Expo-
5. Test Specimens
5.1 Each Type A specimen to be evaluated for external
coating durability shall be a 250 by 250-mm (9.8 by 9.8-in.)
1
This test method is under the jurisdiction of ASTM Committee F07 on
cross section of the design and shall contain, as applicable,
Aerospace andAircraft and is the direct responsibility of Subcommittee F07.08 on
surface coatings of operational, electrically conducting coating
Transparent Enclosures and Materials.
systems complete with bus bars, braids, and temperature
Current edition approved May 1, 2010. Published June 2010. Originally
approved in 1977. Last previous edition approved in 2004 as F520–97 (2004).
sensors.
DOI: 10.1520/F0520-10.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
F520−10
5.1.1 Type A test specimens shall have a fully operational and cross lighting may be used, as appropriate, to assist in the
coating system, when applicable, with an average resistivity identification and classification of visible defects.
consistent with the average resistivity of the representative
7.2 Optical Tests—Measure each Type A specimen for
design. Reprodu
...

This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:F520–97 (Reapproved 2004) Designation: F520 – 10
Standard Test Method for
Environmental Resistance of Aerospace
TransparenciesEnvironmental Resistance of Aerospace
1
Transparencies to Artificially Induced Exposures
ThisstandardisissuedunderthefixeddesignationF520;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method covers determination of the effects of exposure to thermal shock, condensing humidity, and simulated
weather on aerospace transparent enclosures.
1.2 This test method is not recommended for quality control nor is it intended to provide a correlation to actual service life.
1.3
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3.1 Exceptions—Certaininch-poundunitsarefurnishedinparentheses(notmandatory)andcertaintemperaturesinFahrenheit
associated with other standards are also furnished.
1.4 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D1003 Test Method for Haze and Luminous Transmittance of Transparent Plastics
D4329 Practice for Fluorescent UV Exposure of Plastics
F319 Practice for Polarized Light Detection of Flaws in Aerospace Transparency Heating Elements
F521 Test Methods for Bond Integrity of Transparent Laminates
G23Practice for Operating Light-ExposureApparatus (Carbon-ArcType)With andWithoutWater for Exposure of Nonmetallic
3
Materials (Discontinued 2001)
G26Practice for Operating Light-ExposureApparatus (Xenon-Arc Type) With and Without Water for Exposure of Nonmetallic
3
Materials (Discontinued 2001)
F790 Guide for Testing Materials for Aerospace Plastic Transparent Enclosures
G53 Practice for Operating Light-and Water-Exposure Apparatus (Fluorescent UV-Condensation Type) for Exposure of
Nonmetallic Materials (Discontinued 2001) Practice for Operating Light-and Water-Exposure Apparatus (Fluorescent
UV-Condensation Type) for Exposure of Nonmetallic Materials (Discontinued 2001)
G113 Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials
G151 Practice for Exposing Nonmetallic Materials in Accelerated Test Devices that Use Laboratory Light Sources
G154 Practice for Operating Fluorescent Light Apparatus for UV Exposure of Nonmetallic Materials
3. Summary of Test Method
3.1 Two types of test specimens, duplicating the aerospace transparent enclosure design, are subjected to thermal shock,
condensing humidity, and artificial weathering. Edge sealing may be used if representative of the design.
3.1.1 Type A specimens are used to determine the effect of environmental exposure on electrical and optical properties.
3.1.2 Type B specimens are used to determine the effect of environmental exposure on bond integrity.
1
This test method is under the jurisdiction ofASTM Committee F07 onAerospace andAircraft and is the direct responsibility of Subcommittee F07.08 on Transparent
Enclosures and Materials.
Current edition approved Oct. 1, 2004. Published October 2004. Originally approved in 1977. Last previous edition approved in 1997 as F520–97. DOI:
10.1520/F0520-97R04.
Current edition approved May 1, 2010. Published June 2010. Originally approved in 1977. Last previous edition approved in 2004 as F520–97 (2004). DOI:
10.1520/F0520-10.
2
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,[e-mail] Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
F520 – 10
4. Significance and Use
4.1 This test method, when applied to aerospace transparencies of either monolithic glass/plastic or laminated combinations, is
a measure of the ability of the transparency to withstand the effects of artificially induced environments. The test may be used on
configurations employing electrically conductive coatings, and also to evaluate the integrity of noncoated material
...