The diameter ranges of hot-rolled wire rod and cold-drawn wire rod are as follows:

1. Hot-rolled wire rod: The diameter range of hot-rolled wire rod is 5.5-40 mm. Specifically, the diameter of hot-rolled wire rod can be divided into two intervals: 5.5-16.0 mm (in 0.5 mm increments) and 17.0-40 mm (in 1 mm increments).

In addition, the diameter of hot-rolled wire rod is usually in the range of 5-19 mm, with a common diameter of 6-9 mm. These wire rods are mainly used for wire drawing billets, and can also be directly used as building materials and processed into mechanical parts.

2. Application scenarios: Hot-rolled wire rod is mainly used to produce various specifications of steel bars and other structural steels. Because it has a layer of iron oxide on its surface, it is suitable for open-air storage, and has a fast forming speed and high output.

3. Cold-drawn wire rod: The diameter range is usually between 2.3 mm and 25.0 mm. Specifically, common diameter ranges include 2.3mm, 3mm, 4mm, 5mm, 10mm, 12mm, 16mm, 18mm, 25mm, etc.

4. Application scenarios:

Cold-drawn wire rods with smaller diameters (such as 3mm, 4mm, 5mm) are often used in precision instrument manufacturing, electronic components and other fields. Cold-drawn wire rods with diameters between 10mm and 20mm (such as 12mm, 16mm, 18mm) are more common in machine manufacturing and automotive parts.

Cold-drawn wire rods with larger diameters (such as 25mm and above) are often used in building structures, large mechanical parts, etc. In addition, the production process of cold-drawn wire rods includes cold drawing, which is usually made by cold drawing hot-rolled wire rods with a diameter of 6.5~8mm.

5. Production process differences:

Hot rolling: The steel ingot or billet is rolled at high temperature, with a layer of iron oxide on the surface, fast forming speed, high output, and suitable for large-scale production. Cold drawing: The steel is squeezed by roller pressure at room temperature to produce plastic deformation and improve mechanica