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What is Wire Rod?
Wire rod is rolled steel primarily of a circular cross section with a diameter of 4-16 mm in coils or bundles. Such products are made of steel, aluminium, copper and non-ferrous alloys. Steel wire rod is used as feedstock for the drawing of wire intended for different applications, as well as in the manufacture of screws, bolts, nails, mesh and reinforcing elements of reinforced concrete products.
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Hot-rolled Coil For Prestressed Concrete Steel BarsThis product provides strong support for modern construction, especially in large infrastructure projects. The use of prestressed concrete allows for a more durable and longer-lasting structure, which is essential for the growth of the -
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Reinforced Concrete Hot Rolled Ribbed Steel BarsReinforced Concrete Hot Rolled Ribbed Steel Bars, available in four steel grades - HRB400, HRB400E, HRB500, and HRB500E. It is manufactured according to the GB/T 1499.2-2018 standard and comes in a specification range of ∮8 and ∮12. It is -
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Cold Drawn Steel-QB Standard SeriesCold Drawn Steel-QB Standard Series is the latest addition to our product line, specifically designed for the manufacturing of standard parts, bolts, nuts, among others. The steel used for this product is AS08, which complies with -
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Cold Heading Steel - JIS Standard SeriesCold Heading Steel - JIS Standard Series! This series consists of two types of steel, SWRCH35K and SWRCH22A, which are used in a variety of applications. The standard for this product is JIS G 3507. -
![Welding Wire Steel]()
Welding Wire SteelThe product name is welding wire steel, and the steel type is ER70S-6, which is in accordance with the GB/T3429-2015 standard. The specification range is ∮5.5-6.5, and it is mainly used for the production of submerged arc welding wire. -
![Welding Rod Steel]()
Welding Rod SteelThe welding rod steel is a high-quality steel product that is widely used in various welding applications. This product is available in two different grades namely H08A and H08MnA. The welding rod steel conforms to the GB/T3429-2015 -
![Pre-stressed Steel Strand Wire]()
Pre-stressed Steel Strand WireOur pre-stressed steel strand wire is widely used in various industries such as steel nails, pre-stressed steel strand wire, and scored steel wires. Our stringent quality standards ensure that our product is highly durable and reliable, -
![ULC Steel]()
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Standard
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AiSi, ASTM, bs, DIN, GB, JIS, GB, ASTM,JIS, etc.
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Length
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in coil
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Application
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Construction, Drawning wire, making nails, etc
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Tolerance
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5%
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Processing Service
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Cutting
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Steel grade
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Q195,Q235,SAE1006-1018
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Diameter
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5.5-24mm
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Coil weight
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1.9-2.2mts
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Payment term
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TT or LC
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Delivery time
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Stock available
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service
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Accept customization
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Advantages of Using Wire Rods in Automotive Manufacturing
High Strength
With their exceptional tensile strength, wire rods made from high-quality steel are perfect for applications that require robustness and durability. Consequently, they are the preferred material for manufacturing automotive components that are subjected to extreme conditions and heavy loads.
Lightweight
One of the most significant advantages of wire rods is their low weight, making them an ideal choice for automobile production, where weight reduction is essential to improve fuel economy and lower emissions. Using lightweight wire rods to manufacture vehicle components allows manufacturers to lower the vehicle's overall weight and boost performance.
Flexibility
Wire rods can be easily bent and moulded into different shapes and sizes due to their high flexibility, making them an excellent choice for making intricate automobile components that require precise bending and shaping. This flexibility enables manufacturers to produce vehicle components that fit snugly into the design, reducing the risk of failure caused by poor fit.
Cost-Effective
Wire rods are relatively inexpensive compared to other high-strength materials like titanium and carbon fiber. As a result, they are a cost-effective option for automobile manufacturers seeking to produce lightweight, high-performance components without spending too much money. By utilizing wire rods in automobile production, manufacturers can create high-quality components at a lower cost, lowering the vehicle's overall cost.
Corrosion Resistance
Wire rods are highly resistant to corrosion and rust, which is why they are an excellent choice for automobile components exposed to harsh environments like engine parts and suspension systems. This also ensures that the components have a longer lifespan, reducing maintenance costs for vehicle owners. The corrosion resistance of wire rods ensures that the components last longer and function better, reducing the need for frequent repairs and replacements.
Types of Wire Rods: Exploring Varieties for Diverse Applications
Wire rods come in various types, each tailored to specific applications based on their composition, characteristics, and manufacturing processes. Here are some common types:
1. Carbon Steel Wire Rods
Composed primarily of carbon and iron.
Widely used in construction, automotive, and general manufacturing due to their strength and affordability.
2. Alloy Steel Wire Rods
Incorporate additional alloying elements (chromium, nickel, etc.) to enhance specific properties.
Known for improved strength, corrosion resistance, and heat resistance.
Used in critical applications where heightened performance is required.
3. Stainless Steel Wire Rods
Made from steel with a high chromium content.
Resistant to corrosion and oxidation, making them suitable for applications in harsh environments.
Commonly used in the production of fasteners, springs, and wire ropes.
4. Copper Wire Rods
Composed mainly of copper.
Known for excellent electrical conductivity.
Widely used in electrical and electronic applications, including wiring and connectors.
5. Aluminum Wire Rods
Composed of aluminum.
Lightweight and corrosion-resistant.
Used in applications where weight is a critical factor, such as the aerospace industry.
6. Galvanized Wire Rods
Regular wire rods coated with a layer of zinc through the process of galvanization.
Offers enhanced resistance to corrosion.
Commonly used in outdoor construction and fencing.
7. High Carbon Wire Rods:
Contains a higher percentage of carbon.
Known for increased hardness and strength.
Used in applications requiring high wear resistance, such as wire ropes and springs.
Application of Wire Rod
Construction Industry
Wire rods find extensive use in the construction industry. They are employed for reinforcement purposes, enhancing the strength and durability of structures.
Automotive Sector
In the automotive industry, wire rods are utilized for manufacturing various components. Their strength and flexibility make them suitable for applications such as suspension systems.
Electronics Industry
Wire rods play a crucial role in the electronics sector, serving as conductive elements for electrical connections. Their malleability and conductivity make them ideal for this purpose.
Art and Craft
Due to their flexibility and ease of manipulation, wire rods are often used in art and craft projects. Artists and craftsmen create intricate designs and sculptures using these versatile metal rods.
General Manufacturing
Wire rods are employed in various manufacturing processes to create an array of products. Their form allows for the fabrication of different components used in diverse industries.
Shipment / Storage of Wire Rod
Stowage on board ship
Compared with other steel products, wire rods have a somewhat higher stowage factor. They can be stowed in lower holds or tweendecks. Usually deep stowages are involved and, with the present day lack of tweendeckers, such stowages commence directly on the vessel’s tank tops, in bulk carriers. Compact, rigid bundles are necessary in order to effect a good stow. The bundles or coils are stowed with their cylindrical centre cores placed in a fore and aft direction in the ship, much the same as coils of steel sheeting are placed in stow.
Care in handling
Wire rods must be handled with care to avoid nicking, scoring, scratching and localised sharp bends and twists to the windings. In the circumstances, the forks on the fork-lift trucks need tio be protected or of cylindrical construction. Adequate dunnage must be used to keep the goods clear of all metal parts comprising the vessel’s structure.
Points to be considered
The delivery of loose, or partly loose bundles will result in claims being entered to cover the costs of restrapping to facilitate carriage of the goods to final destination. Physical damage may be claimed on account of disintegration of the coils or bundles. Contact with salt water will impair the quality of the goods which may have to undergo a pickling process in order to restore them to their original good condition. The development of rust pitting can permanently damage wire rods.
Ventilation
Wire rod requires particular humidity/moisture and possibly ventilated conditions. Steel corrosion accelerates rapidly at relative humidity > 60%. If possible, relative humidity should be reduced to below 60% by appropriate ventilation measures. However, the following should be noted: Steel exhibits a lower temperature than the external temperature anticipated during transit If the temperature of the ambient air outside the ship rises, this has only a minimal effect on the temperature of the cargo. Ventilation with "warm" external air may result in cargo sweat on the "cold" steel, if the temperature of the latter is below the dew point of the ambient air.
The steel wire rod is a finished product and is cold-formed for farther processing. Although it has a variety of shapes, it is mostly rolled round. Diameters often range from 5 to 15 millimeters, with most comply with the ISO standards, makes it easy for the sizes to advance in increments of 1 mm to 20 mm.
All steel wire rods are formed into the coils without any break. This is to ensure that steel wire rods are well-prepared for farther processing (usually by heat treating, coating, and cleaning). The coils’ internal diameter often varies from 810 to 910 millimeters, and the external, from 1100 to 1300 millimeters (depends on the capability of mill’s equipment). Subsequently, the weight of the coils differs from approximately 600 kg and larger above 2 tons.
Wire Rod Properties and Grades
According to the type of material, Steel wire rods are manufactured in different grades.
Carbon steel wire rod is the most common with no minimum content specified or required of molybdenum (Mo), aluminum (Al), chromium (Cr), niobium (Nb), cobalt (Co), nickel (Ni), tungsten (W), titanium (Ti), zirconium (Zr), vanadium (V), or any other element required for a particular effect of alloying. Carbon steel wire rods contain copper content, generally up to 0.40%. Moreover, the manganese content will not exceed the level of 1.65% and 0.60% will be the maximum level of silicon.
These steel wire rods are supplied in the following grades:
Low Carbon
With C content ≤ 0.15 %. This is also known for “mild steel” or “electrode steel”.
Medium Carbon
Low grade; includes 0.15% < carbon content ≤ 0.23%
High grades; includes 0.23% < carbon content ≤ 0.44%.
High Carbon
Includes C content > 0.44 %.
Besides the grades, there are other features to be guaranteed for carbon steel wire rods while going through the various processes to be with no defects as well as have the right performance according to the destined application.
Special Requirements for Steel Wire Rod
Macro-etch test:It is deep-etch testing to evaluate internal soundness. A representative cross section is etched in a hot acid solution.
Fracture test:In fracture testing, a specimen is fractured to evaluate soundness and homogeneity.
Austenitic grain size requirements:For applications involving carburizing or heat treatment, austenitic grain size for killed steels is to be specified as either coarse (grain size 1 through 5) or fine (grain size 5 through 8 inclusive).
Non-metallic inclusion testing:It comprises a microscopic examination of longitudinal sections of the rod to determine the nature and frequency of the non-metallic inclusions.
Decarburization limits:These are specified for special applications when required. A specimen is polished so that the entire cross-sectional area is in a single plane, with no rounded edges. After etching with a suitable etchant, the specimen is examined microscopically (normally to 100 magnification), and the results are reported in hundredths of a millimeter. The examination includes the entire periphery, and the results reported are to include the amount of free ferrite and the total depth of decarburization.
Mechanical property requirements:The mechanical property requirements of the wire rods as per the relevant standards are to be met by controlling the rolling and control cooling parameters.
Evolution in Wire Rod Technology
Advancements in technology have led to improvements in wire rod manufacturing. Modern facilities use state-of-the-art equipment and techniques, resulting in higher precision, consistency, and overall quality of the produced wire rods. This evolution has expanded the range of applications and increased the efficiency of wire rod usage in various industries.
Environmental Considerations
Efforts are being made to incorporate sustainable practices in wire rod production. Recycling of materials and the use of energy-efficient processes contribute to reducing the environmental impact associated with manufacturing. This aligns with the growing emphasis on eco-friendly practices in the industrial sector.
Global Market Trends
The demand for wire rods continues to grow globally. Emerging economies, especially in the construction and automotive sectors, are significant contributors to this demand. The versatility of wire rods, coupled with ongoing developments in manufacturing technologies, positions them as essential components in a wide array of industries.
Challenges and Innovations
Challenges in the wire rod industry include addressing issues related to material costs, ensuring consistent quality, and meeting specific industry standards. Ongoing innovations focus on developing alloys with enhanced properties, refining manufacturing processes for increased efficiency, and exploring new applications for wire rods.
Applications of Wire Rods in Automotive Manufacturing
Tire Reinforcement
Wire rods are used in tire reinforcement to provide additional strength and durability to the tire. The steel belts in radial tires are typically made from several layers of steel cord embedded in a rubber layer. Wire rods are used to make the steel cord, which is then twisted together to form the steel belts.
Suspension Springs
Suspension springs are responsible for absorbing shock and providing a smooth ride for passengers. Using wire rods in suspension springs results in a lightweight, high-performance suspension system that can withstand heavy loads and extreme conditions. The high tensile strength and elasticity of wire rods make them an ideal material for producing suspension springs, as they can be easily formed into the desired shape and size.
Seat Frames
Wire rods are used to make seat frames, which provide the structure and support for the vehicle's seats. The wire rods used for seat frames are typically made from low-carbon or stainless steel, giving them the necessary strength and corrosion resistance.
Steering Components
Steering components such as tie rods, drag links, and ball joints transmit steering forces and torque from the steering wheel to the wheels. The use of high-strength wire rods in these components results in a highly responsive and precise steering system. Wire rods are particularly useful in producing tie rods connecting the steering gear to the steering knuckle. The high strength and flexibility of wire rods make them an ideal material for producing tie rods that can withstand the forces generated by the steering system.
Wire rod is generally produced by high-speed wire, and its production process can be divided into the following steps:
● The billet is heated to more than 1100 ℃ by a stepping heating furnace;
● The heated billet is discharged from the furnace for high-pressure water descaling;
● Enter the roughing mill for rolling, and the roughing mill is a hot continuous rolling unit;
● The rolled piece after rough rolling enters the water cooling section for cooling to control its internal metallographic structure;
● After leaving the water cooling section, it enters the medium mill and finishing mill for further rolling;
● The finished rolled piece is ejected by the wire spinner to form a coil shape;
● The coiled wire is cooled in the air cooling section;
● At the end of the air cooling section, the wire is rolled into a drum shape by the winder;
● The rolled wire is sent to the baler for bundling;
● Enter the finished product warehouse.
Cooling Mode of Wire Rod
Natural Cooling Method
Natural cooling method, that is, after the wire is rolled out of the finished product frame of the finishing mill, it is wound into a disc by the winding machine, and then hung on the hook conveyor for natural cooling during operation or transferred to the wire product stacking yard for natural cooling through roller table, chain conveyor and other equipment. The basic characteristic of natural cooling method is that the wire rod is naturally cooled at high temperature.
However, if the cooling time is long, the generated iron oxide scale is serious, and the cooling rates of the inner and outer layers of the wire coil are different, resulting in uneven microstructure and properties of the whole length of the wire, with a fluctuation range of about 20%.
Controlled Cooling Method
Controlled cooling method means that the cooling after wire rolling is carried out under controlled conditions. Its basic feature is that the rolled wire rod is immediately supercooled from high temperature to the phase transformation temperature required for the formation of sorbite phase transformation (generally 650 ~ 800 ° C), and then it is cooled in loose coils at different cooling rates. This avoids the disadvantages of natural cooling method and significantly improves the quality of wire rod.
There are many kinds of controlled cooling methods, mainly including STELMORE method, schrmann method, intermittent water cooling method, ed method, EDC method, flow cooling bed method, etc. These methods have their own advantages and disadvantages. Among them, the more common application is the STELMORE method. It is reported that there are more than 150 STELMORE cooling lines in the world.
Quality Requirements of Wire Rod
The quality of wire rod has a great influence on the next process. The new wire rod mill plays an important role in improving wire rod quality, so the new wire rod mill has great vitality and has developed rapidly in recent years. The quality requirements for wire rod are summarized in six aspects:
● Dimensional tolerance;
● Surface quality;
● Chemical composition;
● Metallographic structure;
● Mechanical properties and disc weight.
With the development of production technology, users put forward higher and higher requirements in these aspects. It is these growing requirements that promote the new development of wire rod rolling technology and equipment. Among them, especially the coil weight has played a great role in promoting the development of wire rod mill. High speed wire rod mill (such as rolling mill) is produced to meet the above quality and output requirements.
Our Certifications
Shenzhen Liying Hardware Building Materials Co., Ltd. is located at the intersection of the roads between the beautiful Futian District of Shenzhen and the Hong Kong Special Administrative Region, with unique location and environmental advantages. The company was founded in 2020. After years of development, the company has total assets of hundreds of millions of yuan, with import and export trade as the main business, the company strives to become a global supply chain management integrated service provider, has a large number of professionals, involved in six series of products, the main product is metal wire, rope and its extension products manufacturing, annual sales capacity of 400,000 tons.
Ultimate FAQ Guide to Wire Rod
Q: What is the use of wire rod?
Q: What is the difference between a wire rod and a steel wire?
Q: What is the classification of steel wire rod?
Q: How is wire graded?
Q: What is the difference between wire rod and rebar?
Q: What is the difference between a wire and a wire rod?
Q: What is a wire rod used for in steel?
Q: How can you tell what type of metal a wire is?
Q: What is steel wire called?
Q: How do you read wire specifications?
Q: Is rebar stronger than steel rod?
Q: Is wire mesh stronger than rebar?
Q: Which wire is stronger than steel wire?
Q: What is rod or bar difference?
Q: Which is better rebar or wire mesh?
Q: How many types of wire mesh are there?
Q: How are steel wire rods made?
Q: What are the raw materials for wire rod?
Q: What is the difference between iron and steel wire?
Q: What is difference between wire rod and wire?
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