1.1This practice describes a methodology to statistically characterize the distribution of the largest indigenous nonmetallic inclusions in steel specimens based upon quantitative metallographic measurements. The practice is not suitable for assessing exogenous inclusions.
1.2Based upon the statistical analysis, the nonmetallic content of different lots of steels can be compared.
1.3This practice deals only with the recommended test methods and nothing in it should be construed as defining or establishing limits of acceptability.
1.4The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4.1For measurements obtained from light microscopy, linear feature parameters shall be reported as micrometers, and feature areas shall be reported as micrometers.
1.5The methodology can be extended to other materials and to other microstructural features.
1.6This 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.7This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.