The tensile strength of the steel core of a copper bonded earth rod should be at least 580 N/mm², with most manufacturers and regulations requiring a minimum of 600 N/mm² for added durability and performance. The high tensile strength of the rod guarantees that it can withstand the mechanical force of driving into the earth without bending or shattering, which is crucial to maintainin... https://www.pioneerpowers.com/copper-bonded-earth-rod.php