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Nov . 05, 2024 10:52 Back to list

china black annealed wire specification

Understanding China Black Annealed Wire Specifications


Black annealed wire, often referred to as black wire or annealed steel wire, is a type of wire commonly used in various applications due to its excellent ductility, tensile strength, and flexibility. In China, the specifications for black annealed wire are critical for ensuring quality and performance across different industries, including construction, manufacturing, and agriculture.


What is Black Annealed Wire?


Black annealed wire is produced from high-quality low carbon steel and undergoes a specific annealing process. This process involves heating the wire to a specific temperature and then slowly cooling it down, which effectively improves its mechanical properties. The result is a wire that is soft, flexible, and easy to work with, making it ideal for bending, fabricating, and fastening purposes.


Specifications of China Black Annealed Wire


The specifications for black annealed wire in China are outlined in various national standards, including GB/T 3431-2017. These specifications define several key parameters


1. Material Composition The wire is typically made from low carbon steel, with carbon content generally less than 0.1%. This low carbon content contributes to the wire's malleability.


2. Diameter The diameter of black annealed wire can vary, but it commonly ranges from 0.3 mm to 5.0 mm. The thickness of the wire is determined based on its intended application.


china black annealed wire specification

china black annealed wire specification

3. Tensile Strength The tensile strength is an important property, often specified in megapascals (MPa). Black annealed wire usually has a tensile strength ranging from 350 to 550 MPa, depending on the specific use and production standards.


4. Elongation This property indicates the wire's ability to stretch before breaking and is expressed as a percentage. A typical elongation range for black annealed wire is between 10% and 25%, reflecting its good ductility.


5. Surface Finish The wire is typically coated with a layer of iron oxide, giving it a characteristic black color. This finish not only protects the wire from corrosion but also enhances its aesthetic appeal for certain applications.


Applications of Black Annealed Wire


Black annealed wire is highly versatile and finds numerous applications across various sectors. In construction, it is often used as binding wire for reinforcing bars. In agricultural settings, it is used for tying plants, fencing, and other tasks. Additionally, manufacturers use black annealed wire in the production of various wire products and components.


Conclusion


The specifications for black annealed wire produced in China are critical for ensuring product quality and performance. By adhering to specified standards regarding material composition, diameter, tensile strength, elongation, and surface finish, manufacturers can produce a wire that meets the diverse needs of various industries. This versatility, coupled with its favorable mechanical properties, makes black annealed wire a fundamental component in many applications.


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