Q345 hot-rolled seamless steel pipe knowledge shared by Shandong Liaocheng Q345B seamless steel pipe plant
Q345 hot-rolled seamless steel pipe knowledge shared by Shandong Liaocheng Q345B seamless steel pipe plant. The production process of Q345 hot-rolled seamless steel pipes mainly involves three key steps: piercing, rolling, and sizing. Q345 is a type of low-alloy structural steel, known for its good mechanical properties and widespread use in various industrial applications. One important characteristic of Q345 steel is that its yield strength tends to decrease as the thickness of the material increases. This steel comes in different grades such as Q345A, Q345B, Q345C, Q345D, and Q345E. These grades are differentiated based on their impact toughness at varying temperatures, with higher grades typically offering better performance in colder environments. When manufacturing Q345 hot-rolled seamless steel pipes, special attention must be given during the rolling stage. For instance, when transforming a thick-walled capillary tube into a thin-walled pipe (a process known as wall extension), it's crucial to ensure that the wall thickness remains uniform throughout the pipe. Additionally, maintaining high-quality internal and external surfaces is essential to prevent defects and ensure the pipe's durability. The primary goal of the rolling process is to achieve the desired wall thickness for the step pipe, which plays a critical role in determining the final dimensions and structural integrity of the product. Proper control during this phase ensures that the finished pipe meets industry standards and performs reliably under various conditions.
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