包覆铜包钢线技术 直径(mm)偏差(mm)25%导电率包覆铜包钢线30%导电率包覆铜包钢线铜层厚度(mm)直流电阻(欧/千米)铜层厚度(mm)直流电阻(欧/千米)1.67±0.010.0459×2≤320.072×2≤27.01.628±0.010.0448×2≤33.50.070×2≤28.51.45±0.010.0398×2≤420.062×2≤36.21.29±0.010.0354×2≤530.055×2≤45.51.151±0.010.0314×2≤670.049×2≤57.21.024±0.010.0281×2≤850.044×2≤72.50.813±0.010.0222×2≤1360.035×2≤1150.724±0.010.0196×2≤1720.031×2≤1450.643±0.010.0172×2≤2180.027×2≤1850.574±0.010.0153×2≤2730.024×2≤2320.511±0.010.0135×2≤3440.022×2≤2920.40±0.010.0121×2≤5120.017×2≤473抗拉强度：硬态不小于827MPa 软态不小于380MPa伸长率：硬态不小于1.0% 软态不小于8.0% 另：包覆铜包钢可以根据客户要求，做导电率21%—50%之间，线径0.078—2.80MM的任意线材。