Abstract
More than 540 heats of 1080 wire-rod were statistically analyzed by regression analyses to see whether tensile strength and percent reduction in area (%RA) relate to wire-rod diameter and composition. As diameter increases from 5.6 to 12.7 mm, the trend in %RA shows a decrease with negligible effect on the trend of the tensile strength. It was found that the estimated cooling rate at 700 °C during controlled cooling is responsible for the “diameter effect.” The effect of composition on %RA is minor when contrasted to the “diameter effect.” In particular, the effect of the concentrations of the residual elements on %RA within the compositional range studied is negligible.
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