ASTM A475 Zinc-coated steel wire strand

Zinc-coated steel wire strand is a kind of steel product made of multiple galvanized steel wires twisted together, and it refers to standard ASTM A475.

1. Overview of standard of ASTM A475 Zinc-coated steel wire strand

This standard specifies ordering information,materials and manufacture,technical requirements,workmanship,sampling,

inspection,rejection,packaging and package marking of Zinc-coated steel wire strand. The implementation of this standard ensures quality、stability and safety of Zinc-coated steel wire strand, and provides a solid guarantee for its wide application in various fields.

2. Structure of ASTM A475 Zinc-coated steel wire strand

ASTM A475 Zinc-coated steel wire strand, with its unique structural characteristics, meets requirements in different fields. Its cross-sectional structure is diverse, including 1x3, 1x7,1x19,1x37, which can be selected according to specific application scenarios.In addition, diameter of the steel wire in steel strand and its permissible variations are in line with ASTM A475 , ensuring the uniform specifications and stable performance of strands.

Twist pitch of ASTM A475 Zinc-coated steel wire strand should not be greater than 16 times its diameter, and the outermost layer twist direction is left, and twist direction of adjacent inner layer steel wire is opposite. This twisting method not only improves overall strength of Zinc-coated steel wire strand, but also enhances its resistance.  

3. Advantages of ASTM A475 Zinc-coated steel wire strand

ASTM A475 steel strand has characteristics of good softness, good stability, good reliability and high strength.

(1) **High strength**: ASTM A475 Zinc-coated steel wire strand has high tensile strength, and its tensile strength grades are divided into Common grade, Siemens-Martin Grade, High-strength grad, and Extra high-strength grade (EHS).  This high-strength property enables Zinc-coated steel wire strand to maintain stability when subjected to large loads.

(2) **Excellent softness**: ASTM A475 Zinc-coated steel wire strand has good softness, is easy to bend and lay, and is convenient for construction and use in complex environments.

(3) **Strong corrosion resistance**: Through hot-dip galvanizing, a zinc protective layer is formed on the surface of ASTM A475 Zinc-coated steel wire strand, which effectively improves its corrosion resistance. The zinc layer level is divided into four levels: class1, A, B, and C. Different levels of zinc layer thickness can be selected according to specific environment.

(4) **Good stability**: ASTM A475 Zinc-coated steel wire strand can maintain stable performance during long-term use, and is not prone to deformation or breakage.

(5) **High reliability**: Due to its excellent physical and chemical properties, Zinc-coated steel wire strand has shown extremely high reliability in applications in key fields such as electricity and communications.

4. Application fields of ASTM A475 Zinc-coated steel wire strands

ASTM A475 Zinc-coated steel wire strands are widely used in power, communications, construction and other fields, mainly as load-bearing cables, guy wires, reinforcing cores, etc. They can also be used as ground wires for overhead power transmission, stay wires on both sides of towers or structural cables in building structures.  

(1) **Power field**: In power transmission line, ASTM A475 Zinc-coated steel wire strands are often used for pole tower guy wires and lightning shield wire to improve operating safety of transmission lines and related equipment. During construction, it is also often used as a temporary guy wire. Commonly used steel strand specifications in power projects include 1/4,3/8,5/16 etc.

(2) **Communication field**: In communication systems, ASTM A475 Zinc-coated steel wire strands are often used as the reinforcing core and protective layer of optical cables to improve tensile strength and corrosion resistance of optical cables.

(3) **Construction field**: ASTM A475 Zinc-coated steel wire strands are mainly used for structural reinforcement and production of protective railings in the construction field. Its high strength and corrosion resistance make buildings safer and more reliable.

(4) **Transportation field**: In transportation engineering, ASTM A475 Zinc-coated steel wire strands can be used for reinforcement and protection of structures such as tunnels to improve the safety and durability of transportation facilities.

5. Market prospects and development trends of ASTM A475 Zinc-coated steel wire strands

With rapid development of industries such as electricity, communications, and construction,demand for ASTM A475 Zinc-coated steel wire strands is also increasing. Especially driven by emerging fields such as new energy and smart grids, the application prospects of Zinc-coated steel wire strands are broader. In the future, ASTM A475 Zinc-coated steel wire strand will show the following development trends:

(1) **High performance**: By improving production process and material formula, tensile strength, corrosion resistance and softness of ASTM A475 Zinc-coated steel wire strand will be improved to meet higher-level application requirements.

(2) **Customization**: According to specific needs of different fields and customers, customized ASTM A475 Zinc-coated steel wire strand products and services are provided to meet diversified and personalized needs of the market.

ASTM A475 Zinc-coated steel wire strand plays an important role in many fields with its unique structural characteristics and excellent performance advantages. With continuous advancement of technology and continuous development of market, its application prospects will be broader.

When purchasing and using ASTM A475 Zinc-coated steel wire strand, its specifications, models, uses and implementation standards should be clarified.