A COMPARATIVE STUDY OF MECHANICAL PROPERTIES AND MICROSTRUCTURES OF DEFORMED BARS (GRADE-60) LOCALLY MANUFACTURED IN PAKISTAN

The ms deformed bars are widely used in construction, housing, bridges, flyovers, dams etc. and often the properties claimed by the industries may or may not be compatible with astm standards. in order to check their compatibility with astm standards, ms deformed bar samples of grade 60 of one inch (25 mm) diameter of five different companies were taken from open market. as one of pakistan's popular examples of consistent business success has been the stainless steel and mild steel production. the hypothesis explored in this paper is that meeting such standards requires greater properties, both among producers as well as mechanical properties obtained by tensometer and universal hydralic tensile machine. the study draws on qualitative data to examine either how much difference or similarity is drawn within samples of various industries. and these samples were coded as s-1, s-2, s-3, s-4 and s-5. first of all composition was determined by using optical spectrometer then tensile performed at universal hydraulic testing machine and time load graphs were taken as this test is commercially used, and also tensile was performed on tensometer at laboratory level and stress-strain graph was obtained and calculated. it was concluded that the experimental results of most of the industries were in good agreement with astm but only a few did not show compatibility with astm standards.