Astm E562-19e1

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

where ( N_\texthit ) = total number of points falling on the phase of interest.

The "e1" denotes an editorial correction to the 2019 version, indicating minor typographical or formatting fixes—no technical changes from E562-19. astm e562-19e1

: The standard outlines specific procedures for scanning the metallic surface. This involves using appropriate instruments (such as DCVG, Close Interval Potential Survey (CIPS) tools, or other relevant technologies) to measure and assess the surface's condition systematically.

: An observer counts how many grid points fall within the "phase of interest" (e.g., pearlite in steel or ferrite in duplex stainless steel). Points clearly inside the phase count as one . ) is calculated as the ratio of points

Standard Test Method for Determining Volume Fraction by Systematic Manual Point Count Designation

It is important not to confuse ASTM E562-19e1 with other similar standards: This involves using appropriate instruments (such as DCVG,

remains an indispensable tool in the metallographer’s arsenal. While automated image analysis continues to advance, the systematic manual point count method endures because of its transparency, statistical rigor, and freedom from algorithmic bias. Whether you are certifying a new heat treatment, validating a porosity measurement, or training the next generation of materials engineers, this standard provides a reliable, repeatable, and internationally accepted method.