Wire belongs to section steel according to its cross-sectional shape, and has actually become an independent steel grade. Hot rolled round steel with a diameter of 5-4mm and rebar below 10mm are commonly called wire rods. Most wire rods are wound into coils by winding machines, so they are also called wire rods or coils.

Wire rods are mainly used as raw materials for reinforced concrete reinforcement, welding structural parts or reprocessing (such as wire drawing, wire drawing, etc.). ). According to the distribution catalogue of steel products, wires include ordinary low-carbon steel rolling wires, welding wires, blasting wires, quenched and tempered threaded wires and high-quality wires. The widely used wire rod is mainly ordinary low carbon steel hot rolled wire rod, also known as ordinary wire rod. It is made of common carbon steels Q 195, Q2 15 and Q235 by hot rolling, with a nominal diameter of 5.5- 14.0mm and a weight of 100-200kg per coil. Now it is basically undistorted. Ordinary wire rods are mainly used in construction, wire drawing, packaging, covered electrode and the manufacture of bolts, nuts and rivets. High quality wire rod, only supply high quality carbon structural steel hot rolled wire rod. Such as 08F, 10, 35Mn, 50Mn, 65, 75Mn, etc. Used as raw materials for metal products such as steel wires and other structural parts, and other high-quality steel rolling wires. Traditionally, more than 8 mm is included in high-quality profiles, and less than 8 mm is included in metal products.

Wire rod is one of the steel products with large consumption. After rolling, it can be directly used for reinforcement and welding of reinforced concrete structures, and can also be used after reprocessing. For example, it is drawn into various specifications of steel wire, then twisted into steel wire rope, woven into steel wire mesh, wound and shaped, and heat-treated into springs; Hot forging and cold forging into rivets and cold forging and rolling into bolts and screws; Make mechanical parts or tools by cutting and heat treatment.

Wire rods are generally made of ordinary carbon steel and high-quality carbon steel. According to the distribution catalogue and uses of steel products, wire rods include ordinary low-carbon steel hot-rolled wire rods, high-quality carbon steel wire rods, carbon-clad electrode wire rods, quenched and tempered threaded wire rods, silk-making wire rods, piano wire rods and stainless steel wire rods.

1. Ordinary low-carbon steel hot-rolled wire rod (GB70 1-65), made of low-carbon ordinary carbon structural steel or low-yield carbon structural steel, is the most widely used wire rod in wire rod varieties, so it is also called ordinary wire rod, or plain wire for short.

Main uses: the general line is mainly used for strengthening reinforced concrete structures in buildings, and can also be cold-drawn into steel wires for binding.

2. Ordinary low-carbon steel hot-rolled wire rod (ZBH4403-88) is made of controlled cooling after rolling by a high-speed wire rod mill, and the material is the same as that of ordinary wire rod, but the controlled cooling hot-rolled wire rod has the advantages of high dimensional accuracy, good surface quality and high mechanical properties.

Main uses: The dimensional accuracy of torsion-free controlled cold-rolled wire rod is divided into three levels: A, B and C, which are suitable for wire drawing, construction, packaging and covered electrode, and B and C are suitable for processing bolts, screws and nuts.

3. High-quality carbon steel wire rod (GB4354-84) is rolled with high-quality carbon structural steel. It is one of the most widely used wire varieties.

Main uses: High-quality carbon steel wire rod is mainly used for processing and manufacturing carbon spring steel wire, oil-quenched tempered carbon spring steel wire, prestressed steel wire, high-strength and high-quality carbon structural steel wire, galvanized steel wire and galvanized steel strand.

4. High-quality carbon steel (ZBH44002-88) is hot-rolled with torsion-free controlled cooling, and it is rolled with high-speed wire rod mill without torsion, and after rolling, it is treated with controlled cooling. Compared with high-quality carbon steel wire rod, it has high dimensional accuracy, good surface quality and high mechanical properties.

Main application: The main application is the same as that of high-quality carbon steel wire rod. It is often used to manufacture carbon spring steel wire, oil-quenched tempered carbon spring steel wire, prestressed steel wire, high-quality carbon structural steel wire, galvanized steel wire, etc.

5. The wire rod (YB349-64) for rope-making steel wire is one of the high-quality carbon structural steel hot-rolled wire rods.

Main uses: Wire rod for rope steel wire can be made of high-quality carbon structural steel with steel grades of 35, 40, 45, 55, 60, 65, 70, 75, 80 and 85. The chemical composition conforms to GB699 (technical conditions for high-quality carbon structural steel).

6. Rope-making steel wire is made of twisted controlled cold-rolled wire rod (ZBH44004-88), twisted controlled cold-rolled wire rod and high-quality carbon structural steel, which are rolled on a twisted wire rod mill and cooled after rolling. The wire rolled in this way has high dimensional accuracy, good surface quality and excellent mechanical properties.

Main uses: mainly used for drawing rope steel wire and stranded wire.

7. Carbon covered electrode steel wire rod (GB3429-82) and carbon covered electrode steel wire rod are made of low-carbon high-quality carbon structural steel by hot rolling.

Main uses: mainly used for manufacturing manual arc welding core.

8. Carbon-coated electrode steel controlled cooling hot-rolled wire rod (ZBH44005-88) and carbon-coated electrode steel controlled cooling hot-rolled wire rod are made by rolling on a closed twisted wire mill and then controlled cooling after rolling. It is a high-quality covered electrode steel wire rod with high dimensional accuracy, good surface quality and superior performance.

Main uses: mainly used for manufacturing carbon steel hot-rolled round bars with coated electrode steel cores.

9. Alloy structural steel hot-rolled wire rod (GB3077-82) is made of alloy structural steel by rolling. Alloy structural steel has 26 steel groups and 78 steel grades. Various manufacturers choose various brands for production according to the buyer's requirements and different uses.

Main uses: alloy structure hot-rolled wire rod is mainly used for drawing steel wire, metal products and structural parts.

10. Carbon tool steel hot-rolled wire rod (GB 1298-86) is made of high-quality or high-quality carbon steel. Good processability and wear resistance, low price.

Main uses: mainly used for drawing steel ratio and manufacturing tools.

1 1. alloy tool steel hot-rolled wire rod (GB 1299-77)

Alloy tool steel is a kind of steel made by adding alloy elements such as chromium, tungsten, molybdenum, vanadium, silicon, manganese, nickel and cobalt into the matrix of carbon tool steel. Compared with carbon tool steel. It has the characteristics of good hardenability, difficult cracking during heat treatment, high wear resistance and heat resistance. Alloy tool steel hot-rolled wire rod is made of alloy tool steel, which has 5 steel groups and 33 steel grades. Produced by Dalian Steel Works, Benxi Steel Works and Shaanxi Steel Works respectively.

Main uses: suitable for making measuring tools, cutting tools, cold and hot dies, impact-resistant tools, etc.

12. spring steel hot-rolled wire rod (GB 1222-84)

Spring steel is a kind of steel used to make springs or other elastic elements. Springs and elastic elements mainly use their elasticity to absorb and store energy, so as to reduce vibration and impact or make parts complete some actions. Spring steel is required to have high yield strength, especially high yield ratio (the ratio of yield strength to tensile strength), high elastic fatigue strength, high high temperature resistance and corrosion resistance because it works under the conditions of impact, vibration or long-term uniform periodic alternating stress. Spring steel should also have good surface quality.

Spring steel includes carbon spring steel and alloy spring steel, with a total of 17 brands.

Main uses: Spring steel hot-rolled wire rod is mainly used to produce spiral springs for various purposes.

13. Ball bearing steel hot-rolled wire rod (YB9-68), referred to as bearing steel for short, is a kind of steel used to manufacture rings (bushings) and rolling bodies (balls) of various rolling bearings. Due to the particularity of its application, bearing steel requires high and uniform hardness, wear resistance, high elasticity and fatigue strength. Sufficient toughness and hardenability, and at the same time, it has certain corrosion resistance in atmospheric environment or lubricant. Some special-purpose rolling bearings also require high temperature resistance, corrosion resistance, non-magnetism, ultra-low temperature, high precision and long life. Therefore, the selection of bearing steel and steel quality requirements are stricter than general steel.

Bearing steel usually refers to high-carbon chromium steel, in addition to carburized bearing steel and high-carbon chromium stainless bearing steel. There are five kinds of steel commonly used for rolling hot-rolled wire rod of ball bearing steel.

Main uses: Hot-rolled wire rod of bearing steel is mainly used to manufacture bearing steel balls.

14. stainless steel wire rods (GB4356-84), stainless steel wire rods is made of various brands and different structures of stainless steel.

Main uses: Stainless steel wire rod is mainly used for manufacturing stainless steel wire, stainless steel spring wire, stainless steel upsetting steel wire and steel wire for stainless steel wire rope. According to the main industrial uses, stainless steel wires also include stainless steel and stainless acid-resistant steel wires.

15. stainless steel wire rods for welding (GB424 1-84) stainless steel wire rods for welding is different from general stainless steel wire rods in chemical composition. In order to ensure its excellent welding performance and improve weld quality, stainless steel wire for welding is characterized by low carbon content, less toxic impurities such as phosphorus and sulfur, and high nickel and chromium content.

Main uses: mainly used for manufacturing steel core and welding wire of welding electrode.