Abstract
After statistical treatment of test results on all the specimens, representative values of tensile strength, elongation and shock of commercial electrodes have been found. First, possible application of law of large numbers was examined by establishment of an equation for frequency probability curve. It was confirmed that, with a wide range of variance elongation values are delicately subject to the state of deposit metal ; and that among those tested. Class A core wire is found, to be highly sensitive to flux with a tendency to produce inferior results to Class B if the flux composition does not match.
