The 8mm Copper Wire Rod are made of pure electrolysis copper and use Imported American advanced production equipment producing. They are precise in size and smooth on surface. Besides, they are of good heat conductibility. Furthermore, they are reliable in quality. Thus, they are widely used for heat exchangers, radiators, coolers, electro-heat-up rod, air conditioner and refrigerators. The copper rods can be used for Electronic or machine. Copper rod is mainly use for electrical and conductive fields, we can produce the copper rod in lengths as per ASTM, GB and ISO9001 standards. Copper rod Supplied in hard, half hard and soft annealing temper. Diameter: 3mm, 8mm~38mm (Metric system) From 0.787inch to 4.92 inch (British system), or from 20mm to 125mm (Metric system Copper wire rod standard DIN13602 DIN40500-P4 ASTM B 49/98 EN 1977(1998) E-Cu min 99.97% Diameter wire mm 8 OxygenO2cont(max) ppm 200 Tolerance diam.wire mm +/-0.30 Tensile strength (min) N/mm2 220-240 Electrical resistance at 20 oCmax n/Ω 17.24 Elongation to 200 mm(min) % 38 Conductivity M/Ωm2 58 Coil weight Tons/coil 2.8-5.0