This standard describes the method for determining the mechanical characteristic, called elastic constant K, of a tensile test complex in which the increase in load leads to essentially constant elongation speeds and which is used for the determination of unit yield loads according to what is specified in UNI 556, UNI 5547, UNI 5465, UNI 5292 and UNI 6326.
UNI 7844-1978 history
1978UNI 7844-1978 Determination of the elastic constant K of the tensile testing machine