High Strength Low-Relaxation Hot-DIP Galvanized Steel Strand
High Strength Low-relaxation hot-dip galvanized steel strand is a kind of prestressed steel strand used for reinforcement of concrete structure. This type of steel strand has higher strength, better ductility and weldability, and better protection from corrosion than regular steel strand.
In the market, it is widely used in the engineering industry due to its high strength and low relaxation characteristics. This type of steel strand consists of seven wires, each of which is thermally galvanized in hot dip zinc-coating process. And then the wires are stranded together around a central core, making a circular form.
For prestressed concrete structure requirement, YB/T152-1999 requires that this type of steel strand should have low relaxation rate, which makes it have high strength and be able to bear the permanent loading of concrete structure. This type of strand should comply with the 8 strand construction leading to a thicker cable diameter with the same weight. And its tensile strength is 1770MPa, diameter is 12.7mm, and elongation ratio at break is 17%.
The hot-dip galvanizing method used for this type of steel strand ensures excellent rust resistance and makes it useful for transmission lines and building reinforcement. The zinc coating also provides a valuable seal against the elements that can cause corrosion and other degradation of the strand. This strand also has a high bendability, which makes it easier to lay along the surface and in tight spaces, making it suitable for many situations.
In addition, this type of steel strand has the advantage of easy field installation, so it is widely used in various applications. It does not need any additional protective coating, such as rust-proof paint, during installation, saving time and money for contractors. This type of strand offers good ability in bearing short-term loads, long-term loads, and dynamic loads.
In conclusion, high strength low-relaxation hot-dip galvanized steel strand is a kind of prestressed steel strand used for reinforcement of concrete structure, featuring high strength, low relaxation rate, easy installation, good ductility and weldability, corrosion protection, and good ability in bearing short-term loads, long-term loads, and dynamic loads. Therefore, it is a great choice for engineering and infrastructure projects and is widely used in the industry.
