1) The copper layer thickness is more than 0.254mm(also can be made by your request)
2) The steel core  tensile strength not less than 580Nm/mm2.
3) Use the low carbon steel as the core, and the carbon content is about 0.15%.
4) The purity of the copper using as cladding shall be 99.9% pure copper.
5) the Copper Ground Rod will be capable of being through 90 at a maximum radius if 100mm with no copper fracture and with no ill effect on the bond between the steel and the copper cladding.
6) Good in anticorrosion that usage-life is more than 50 years or more, constant low resistance and good plasticity which had the characteristics of copper as well as steel.