Prestressed steel strands are stranded steel cables composed of 2, 3, 7 or 19 high-strength steel wires that have been stress relieved (stabilized) and are suitable for prestressed concrete and similar purposes.
The main characteristics of prestressed steel strands are high strength and good relaxation performance, and they are relatively straight when unfolded. The common tensile strength grade is 1860 MPa, and there are also strength grades such as 1720, 1770, 1960, 2000, 2160, 2230, and 2360 MPa. The yield strength of this steel is also very high.