Hot rolled plates are produced through a series of well - orchestrated steps

Hot rolled plates are produced through a series of well - orchestrated steps. First, the raw material, typically a steel billet, is carefully selected and inspected. The billet is then heated in a furnace to a specific high temperature, usually between 1000 - 1200°C. This heating process is crucial as it makes the steel malleable for the subsequent rolling operations.

Manufacturing Process

​

ear tags and applicators are produced through a series of well - orchestrated steps. First, the raw material, typically a steel billet, is carefully selected and inspected. The billet is then heated in a furnace to a specific high temperature, usually between 1000 - 1200°C. This heating process is crucial as it makes the steel malleable for the subsequent rolling operations. After reaching the appropriate temperature, the billet enters the rough rolling stage. Here, the thick billet is gradually reduced in thickness by passing it through a series of roughing mills. The rough rolling significantly decreases the thickness of the steel, but the surface is relatively rough at this point. Next, the semi - finished product moves on to the finish rolling mills. In this stage, the plate is further refined to achieve the desired final thickness, width, and length with higher dimensional accuracy. Once the rolling is complete, the hot plate is rapidly cooled. This cooling process, often using water or air, helps to set the micro-structure of the steel, thereby determining its mechanical properties. Finally, the cooled plate can be either cut into specific lengths or coiled for storage and transportation.

CREDIT

Physical and Mechanical Properties​

Hot rolled plates possess several distinct properties. Physically, they often have a rough surface due to the presence of an oxide scale formed during the high - temperature rolling process. This oxide scale gives the plate a characteristic black or blue - black appearance. In terms of mechanical properties, hot rolled plates generally have good ductility. They can be easily formed into various shapes through processes such as bending and stretching. Their strength, although not as high as some cold - worked steels, is sufficient for many applications. For example, the yield strength of common hot rolled carbon steel plates can range from 200 - 400 MPa, depending on the specific grade. The tensile strength is also in a range that allows for use in structures where moderate loads are expected. Additionally, hot rolled plates have good weld-ability, which is an important factor for applications that require joining multiple pieces of steel together.

Applications​

The applications of hot rolled plates are extensive across various industries. In the construction industry, they are widely used for building structures such as beams, columns, and trusses. Their good mechanical properties and relatively low cost make them an ideal choice for large - scale construction projects. In the automotive industry, hot rolled plates are used for manufacturing parts like chassis components. The ability of hot rolled plates to be formed into complex shapes through stamping and other forming processes is well - utilized here. The shipbuilding industry also heavily relies on hot rolled plates. They are used to construct the hulls of ships, where their strength and weld-ability are crucial for ensuring the integrity and safety of the vessel. Moreover, in the manufacturing of industrial equipment such as storage tanks, hot rolled plates are commonly employed due to their ability to withstand internal pressures and external environmental conditions.