Based on ASTM Standards, measuring the distance between 2 indents or the edge of a test piece and an indent involves at least 2 ½ times the indentation’s diagonal (dV).

Based on JIS and ISO standards, the distance between 2 indent centers is a minimum of 3x the indent’s diagonal for copper, copper alloys, and steel, and a minimum of 6 times for lighter metals, tin, lead, as well as their alloys.

The distance from an indent’s center and the test piece edge must be a minimum of 2 ½ times the dV for copper, steel, and copper allows, and a minimum of 3x for light metals, tin, lead, as well as their alloys.