Astm E562-19e1 (2025)

ASTM E562-19e1 provides a procedure for estimating the volume fraction of a specific phase or constituent in a microstructure using a method. It is the manual counterpart to automated image analysis (covered by ASTM E1245) and is widely used in industries such as steel, aerospace, and failure analysis.

) is calculated as the ratio of points falling on the phase to the total number of points in the grid ( Ptcap P sub t

The American Society for Testing and Materials (ASTM) is a globally recognized leader in the development and delivery of voluntary consensus standards. Among its extensive catalog of standards, ASTM E562-19e1 stands out for its critical role in ensuring the integrity and safety of metallic structures. This article aims to provide an in-depth look at ASTM E562-19e1, exploring its significance, application, and the methodologies involved in systematic scanning of a metal or metallic surface for relevance to cathodic protection. astm e562-19e1

: Ensuring that the ferrite-to-austenite ratio in duplex stainless steels remains within specification to prevent mechanical failure.

Select a magnification that allows clear discrimination of the phase of interest. The field of view should contain at least 10 to 20 features of the smallest phase to avoid bias. Typical magnifications range from 100× to 1000×. ASTM E562-19e1 provides a procedure for estimating the

ASTM E562-19e1 is a test method developed by ASTM International’s Committee E04 on Metallography. The “19” indicates the year of original approval or latest revision (2019), and the “e1” denotes an editorial correction (typically a typographical or formatting fix) after the 2019 issuance.

ASTM E562-19e1 is a standard that provides guidelines for the systematic scanning of a metal or metallic surface to assess its relevance to cathodic protection. Cathodic protection (CP) is a technique used to control the corrosion of a metal surface by making it the cathode of an electrochemical cell. The standard, officially known as "Standard Practice for Systematic Scanning of a Metal or Metallic Surface for Relevance to Cathodic Protection," was last updated in 2019 and includes a notable revision (denoted by "19e1"). Among its extensive catalog of standards, ASTM E562-19e1

In the fields of materials science, metallurgy, ceramics, and failure analysis, quantifying the microstructure is not just an academic exercise—it is a critical requirement for quality control, product development, and performance prediction. One of the most enduring and widely referenced standards for this purpose is .