Reduction area

In a tensile test acc. to EN ISO 6892-1 (DIN EN 10002-1), the specimen starts to reduce its cross section area depending on the material quality so that a decrease in cross section of the test rod and subsequently a breaking point is obtained.

By measuring the cross section of the reduction area (smallest cross section) after breaking (Su) and definition of the change in cross section ΔS in comparison with the initial cross section So, the reduction of area after fracture Z in percent can be calculated using Eq. 1:

Eq. 1