... ,easy install 3.Heat treatment,more strength 4.CE,ISO Earth rod mainly used for oil and chemical, electrical, telecom, airport ... storageField of application: 5. The copper layer plasticity: the copper earth rods bent 1800, copper layer without cracks, without shedding phenomenon ... life more than 30 years, relieve the maintenance cost of earth rod.3. Tensile strength: >=500N/mm2. Resistivity: <=0.05Ω ...