The main differences between prestressed steel wire and prestressed steel strand are as follows:

1. The implementation standards are different. Executive standard of prestressed steel strand: GB / t5224-2014; Executive standard of prestressed steel wire: GB / t24238-2009.

2. Different appearance. The diameter of prestressed steel wire is different. The prestressed steel strand is composed of three to twelve strands, with threaded grooves in shape, but the number of grooves varies with the number of strands. The prestressed steel strand used in prestressed concrete engineering is usually 7 strands, each with different diameter and strength. The specification and name are expressed by the strength grade, number of strands and single strand diameter (or total diameter) of prestressed steel strand.

3. Different uses. Prestressed steel wire is widely used in concrete poles, prestressed concrete bridges, penstocks, railway sleepers, long-span roof trusses and special structures in residential projects. Prestressed steel strands are mainly used in roads, bridges and prestressed reinforced concrete. In addition, they are also used in large international airports, water conservancy dam construction, concrete protective walls of nuclear power plants and high-rise buildings. For example, Guangzhou New Baiyun International Airport used prestressed steel strand as a building material in the construction process.

4. The binding methods are different. Prestressed steel wire usually refers to a single steel wire with a diameter of 3-6mm, mostly dozens of wires in a bundle, while prestressed steel strand is composed of two, three, five, seven and other steel wires. When in use, several steel strands are generally used as a bundle, generally no more than seven. The specific number of steel strands should be determined according to the actual needs.

5. The processing technology is different. Prestressed steel wire usually adopts metallic or non-metallic coatings or coatings such as galvanized and epoxy resin to improve the durability of products and delay the service life; Secondly, in order to be better applied in prestressed concrete, there are usually nicks on the surface. After the completion of the stranding process, the prestressed steel strand usually goes through a molding process. Through this process, the structure of the prestressed steel strand is more tight and the surface is more conducive to the grasp of the anchorage.