Material of steel tendons

The material of steel tendons also must be of a high strength. Tendons should possess required material and geometrical properties so that a desired degree of prestress could be produced in the material. It should remain elastic utpo to high stress levels. It should have a high value of elastic modulus in order to contribute to the stiffness of the prestressed structural element. It should be subjected to low creep and relaxation losses at the stress levels normally encountered in prestressing, especially at high temperatures.