The increase in a sample's gauge length measured after a rupture divided by the sample's original gauge length is referred to as elongation. The greater the elongation, the higher the ductility of the material. Elongation cannot be used to predict the behaviour of materials subjected to sudden or repeated loading.

Elongation testing can be carried out on a range of Lloyd Instruments materials testing machines together with NEXYGENPlus data analysis software when more comprehensive testing results are required.

Typical graph showing an elongation/tensile test on a rubber dumbbell sample.

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