ASTM C1422/C1422M-10
(Specification)Standard Specification for Chemically Strengthened Flat Glass
Standard Specification for Chemically Strengthened Flat Glass
SCOPE
1.1 This specification covers the requirements for chemically strengthened glass products that originate from flat glass and are used in general building construction, transportation, and other specialty applications, such as copy machine scanners, computer disks, and flat glass screens for television monitors. Techniques such as ion implantation, dealkalization, etch-strengthening, and glaze coatings are specifically excluded.
1.2 Classification of chemically strengthened glass products is based on the laboratory measurements of surface compression and case depth and not on the modulus of rupture (MOR). This specification does not purport to address end-use performance.
1.3 A test method for the measurement of case depth and surface compression is included in Section 8.
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.5 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.
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Designation:C1422/C1422M −10
StandardSpecification for
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Chemically Strengthened Flat Glass
This standard is issued under the fixed designation C1422/C1422M; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope Polarizing Microscope and Optical Retardation Compen-
sation Procedures
1.1 This specification covers the requirements for chemi-
C1036 Specification for Flat Glass
cally strengthened glass products that originate from flat glass
C1279 Test Method for Non-Destructive Photoelastic Mea-
and are used in general building construction, transportation,
surement of Edge and Surface Stresses in Annealed,
and other specialty applications, such as copy machine
Heat-Strengthened, and Fully Tempered Flat Glass
scanners, computer disks, and flat glass screens for television
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2.2 ANSI Standard:
monitors. Techniques such as ion implantation, dealkalization,
Z97.1–2009 Safety Glazing Materials Used in Buildings-
etch-strengthening, and glaze coatings are specifically ex-
Safety Performance, Specifications and Methods of Tests
cluded.
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2.3 Federal Document:
1.2 Classification of chemically strengthened glass products
CPSC 16CFR 1201 Consumer Product Safety Commission
is based on the laboratory measurements of surface compres-
Safety Standard for Architectural Glazing Materials
sion and case depth and not on the modulus of rupture (MOR).
This specification does not purport to address end-use perfor-
3. Terminology
mance.
3.1 Definitions:
1.3 A test method for the measurement of case depth and
3.1.1 Refer to Terminology C162, as appropriate.
surface compression is included in Section 8.
3.1.2 blemishes—RefertoSpecificationC1036forflatglass.
1.4 The values stated in either SI units or inch-pound units
3.2 Definitions of Terms Specific to This Standard:
are to be regarded separately as standard. The values stated in
3.2.1 case depth—depth of compression below the surface
each system may not be exact equivalents; therefore, each
to the nearest zero stress plane.
system shall be used independently of the other. Combining
3.2.2 chemically strengthened glass—glass which has been
values from the two systems may result in non-conformance
strengthened by ion exchange to produce a compressive stress
with the standard.
layer at the treated surface.
1.5 This standard does not purport to address all of the
3.2.3 ion exchange process—the exchange of constituent
safety concerns, if any, associated with its use. It is the
ions in the glass with externally supplied ions (generally at
responsibility of the user of this standard to establish appro-
temperatures near the strain point of the glass). This may be
priate safety and health practices and determine the applica-
accomplished by immersing glass in a molten salt bath or
bility of regulatory limitations prior to use.
solution with or without electric field assistance, exposing
2. Referenced Documents
glass to plasma, applying a paste on the glass surface, or
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contacting glass with molten salts in a furnace.
2.1 ASTM Standards:
C162 Terminology of Glass and Glass Products
3.2.4 surface compression—an in-plane stress which tends
C978 Test Method for Photoelastic Determination of Re- to compact the atoms in the surface.
sidual Stress in a Transparent Glass Matrix Using a
4. Significance and Use
4.1 Chemically strengthened glass is significantly stronger
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This specification is under the jurisdiction of ASTM Committee C14 on Glass
and Glass Products and is the direct responsibility of Subcommittee C14.08 on Flat than annealed glass, depending upon the glass composition,
Glass.
strengthening process, level of abrasion, and the application
Current edition approved Oct. 1, 2010. Published December 2010. Originally
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approved in 1999. Last previous edition approved in 2005 as C1422–99(2005) .
DOI: 10.1520/C1422_C1422M-10.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM 4th Floor, New York, NY 10036, http://www.ansi.org.
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Standards volume information, refer to the standard’s Document Summary page on Available from U.S. Consumer Product Safety Commission (CPSC), 4330 East
the ASTM website. West Hwy., Bethesda, MD 20814, http://www.cpsc.gov.
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C1422/C1422M−10
FIG. 1Slice Location
environment. The strengthening process does not contribute 5.1.1.7
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