Steel strand wire is composed of a number of steel wire twisted steel products, carbon steel surface can be added according to the need to add galvanized layer, zinc aluminum alloy layer, aluminum clad, copper coating, epoxy coated and so on.

(1) Classification by use

Prestressed steel strands, galvanized steel strands (for electric power) and stainless steel strands, wherein prestressed steel strands coated with anti-corrosion grease or paraffin wax and coated with HDPE are called unbonded steel strand. Prestressed steel strands are also made of galvanized or galvanized aluminum alloy steel wires.

(2) Classification according to material characteristics

Steel strand, aluminum clad steel strand and stainless steel strand.

(3) Classification according to structure

The prestressed steel strand can be divided into 7 wires, 2 wires, 3 wires and 19 wires according to the number of steel wires, and the most commonly used is the 7-wire structure.

The galvanized steel strand and aluminum-covered steel strand for electric power are also divided into 2, 3, 7, 19, 37 and other structures according to the number of steel wires, and the most commonly used is the 7-wire structure.

(4) Classified by surface coating layer

It can be divided into (smooth) steel strand, galvanized steel strand, epoxy-coated steel strand, aluminum-covered steel strand, copper-coated steel strand, plastic-covered steel strand, etc

Galvanized steel strand is usually used for messenger wire, guy wire, core wire or strength member, etc. It can also be used as earth wire/ground wire for overhead transmission, barrier cable on both sides of the road or tructure cable in the building structure. The commonly used prestressed steel strand in prestressed steel strand is uncoated low relaxation prestressed concrete (uncoated steel strand for prestressed concrete), also has galvanized, commonly used in Bridges, construction, water conservancy, energy and geotechnical engineering, etc. unbonded steel strand or monostrand) is commonly used in floor, foundation works, etc.