Channel steel is categorized into standard and light channel steel. It is primarily used in construction structures, vehicle manufacturing, other industrial structures, and fixed cabinets, often in conjunction with I-beams. Channel steel can also be divided into four types based on shape: cold-formed equal-channel steel, cold-formed unequal-channel steel, cold-formed inward-rolled edge steel, and cold-formed outward-rolled edge steel. According to the theory of steel structures, the flanges of the channel steel should bear the load, meaning the channel steel should be positioned upright, not lying flat.

Q345B Channel Steel

Q345A, Q345B, Q345C, Q345D, Q345E represent different grades, differing primarily in the impact temperature they withstand. Grade Q345A does not require impact testing; Q345B is tested at 20 degrees Celsius; Q345C at 0 degrees Celsius; Q345D at -20 degrees Celsius; and Q345E at -40 degrees Celsius. The impact values also vary with the different impact temperatures.