NF EN ISO 2566-1

<p>This document specifies a method of converting room temperature percentage elongations after fracture obtained on various proportional and non-proportional gauge lengths to other gauge lengths.</p> <p>Formula (1), on which conversions are based, is considered to be reliable when applied to carbon, carbon manganese, molybdenum and chromium molybdenum steels within the tensile strength range 300 N/mm² to 700 N/mm² and in the hot-rolled, hot-rolled and normalized or annealed conditions, with or without tempering.</p> <p>These conversions are not applicable to:</p> <p>a) cold reduced steels;</p> <p>b) quenched and tempered steels;</p> <p>c) austenitic steels.</p> <p>These conversions are not applicable when the gauge length exceeds  or where the width to thickness ratio of the test piece exceeds 20.</p>