These test methods are used to estimate the effect of exposure,
under surface tensile strain conditions, either dynamic or static,
in an atmosphere containing specified levels of ozone
concentration, expressed as partial pressure (refer to Note 1), on
vulcanized rubber, rubber compounds, molded or extruded soft
rubber, and other specified materials, or as may be determined
empirically. The effect of naturally occurring sunlight or light
from artificial sources is excluded.
Previously published ASTM documents Test Method D518 and Test
Methods D3395 have been included in these test methods, D1149, in
2007. Please refer to Note 2.
Test Method D518 and Test Methods D3395 have henceforth been
withdrawn and superseded by Test Methods D1149. When Test Methods
D1149 is cited, or otherwise referenced, a notation shall be
included to this effect. Please refer to section 3.2 for the
The specified conditions of exposure to ozone in the controlled
environments are accelerated in comparison to outdoor exposure.
These accelerated ozone test methods may not give results which
correlate with outdoor exposure tests or service performance.
All materials, instruments, or equipment used for the
determination of mass, force, dimension, ozone concentration,
partial pressure, temperature, velocity, and gas exchange rate
shall have direct traceability to the National Institute for
Standards and Technology, or other internationally recognized
organization parallel in nature.
The values stated in SI units are to be regarded as standard.
The values given in parentheses are for information only. Many of
the stated SI units are direct conversions from the U.S. Customary
System to accommodate the instrumentation, practices, and
procedures that existed prior to the Metric Conversion Act of
This standard involves hazardous materials, specifically
ozone. It may also involve hazardous operations and equipment. 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.
NOTE 1—A discussion and explanation regarding the measurement of
ozone concentrations based upon parts of ozone per unit of air
versus partial pressure is provided in Test Methods D4575,
specifically Appendices X1 and X2. Test Methods D4575 is also
recommended as a source of background information regarding
standards involving materials exposed to ozone.
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