1.Copper is oxygen free ,ductibility 2.High copper contents>99.9% 3.Oxygen<0.002% 4.Elongation>35% 5.Tensile strength>196Mpa Oxygen free copper rod ,oxygen-free copper ,red ... WEIGHT:2.5T-5T diameter 8+/-0.4mm copper content(Ag) <=99.95% oxygen content 200-500PPM electrical conductivity >=100%(IACS) ... non-flaw Surface oxidation layer <=400 tensile strength 25kg/mm2 Oxygen free copper rod