This International Standard specifies a method for the determination of the efficiency, weld metal recovery and deposition coefficient of carbon steel and low alloy high tensile steel covered electrodes in the sizes 3.15 to 6.3 mm. For the practical use of this International Standard, the precision of measurement specified is sufficient because of the inherent variation in characteristics of individual electrodes. Section 4 specifies the measurement of a number of different values. It is, however, necessary to measure only those values required for the calculation of the particular factors being determined.