Wire rod is the smallest cross-section size of hot-rolled steel. In our country, hot-rolled round steel supplied in coils of eight specifications with a diameter of 5 to 9 mm is generally called wire rod. Because the wire is delivered in coils, it is also called wire rod. The concept of wire rods in foreign countries is slightly different from that in my country. In addition to circular cross-sections, there are also other shapes, and their diameters are inconsistent due to different demand conditions and production technology levels. According to the different rolling mills, it can be divided into two types: high-speed wire rod (high wire) and ordinary wire rod (plain wire). Wires are generally made of ordinary carbon steel and high-quality carbon steel. According to the steel distribution catalog and different uses, wire rods include ordinary low carbon steel hot-rolled round wire rods, high-quality carbon steel wire rods, carbon welding rods and wire rods, quenched and tempered threaded wire rods, wire rods for steel wire ropes, and wire rods for piano wires. And stainless steel wire rods, etc.