copper clad steel ground rod

99.9% pure copper bonded to low carbon steel by electroplating,which ensures high resistance to corrosion. 1Visual examination clean, no cracks, no burrs, clear mark2Verifications of dimensionLength: ≤ +5mmdiameter: ≤+0.1mm3 Thickness of average copper coating≥0.254(according to requests)4 Bending test achieving permanent angular bent of 30 degrees, no pits, no cracks.5 Resistance rate(Ω)resistance rate≤ 0.059 Ω. mm sq./m6Elongation≥20%7Tensile strength≥570N/mm sq.8Yield point ≥300N /mm sq. 9Anticorrosiondipped in the 10% nitric acid at least 90hours and loss of corruption 15% all sizes ground rods are available. Common sizes as follows: Article No.thread diameter(mm)Length(M)YX-DJ1414.21.51.82.53.0YX-DJ16161.51.82.53.0YX-DJ1717.21.51.82.53.0YX-DJ18181.51.82.53.0YX-DJ20201.51.82.53.0YX-DJ22221.51.82.53.0YX-DJ25251.51.82.53.0