Abstract
It is generally thought that due to the coarse grains (left on the heat affected zone of a weldment), there is loss of accuracy in the measurement of the stress obtained from these regions by the X-ray diffraction technique. In the present work the specimens were oscillated for some milimeters in order to increase the number of grains concerned in the diffraction. Using the specimens cut from an electroslag-welded plate, the relation between the grain size and the oscillating stroke of the specimen has been investigated.