... produce various copper mould tubes,including square copper tubes,rectangular copper tubes,round copper tubes,non-standard copper mould tubes Copper moulds have played ... quick solidification. The mould must exhibit excellent thermal conductivity, be resistant for thermal erosion, and be resistant to distortion from ... .083°C1.083°C1.078°C1.080°CCoefficient of thermal expansion at 20°C1,68 10-51,68 10- ...