The mechanical properties laid down in international chain specifications aim to achieve certain characteristics as minimum values. The test force gives guidance to the point at which permanent deformation occurs, but as the maximum value of 1.6% allows for total extension, of which some can be permanent set, the actual yield point could be lower and is therefore not clearly defined.

In order to provide a value which ensures the yield point is above a stated test force, Reilloc use a maximum figure of 1.4% so that all extension at test force is elastic stretch, together with a higher loading. This provides a chain which can absorb higher loads in service without suffering permanent deformation. For comparison purposes a value for total extension of 1.6% is also listed to relate to other specifications.

This high yield point is not achieved at the expense of ductility as increased total elongation at fracture shows. The particularly high deflections applied in the bend test equally demonstrate this point as well as being a very positive way of ensuring weld integrity.