Poor: 1. With the same amount of steel, H-beam can have higher stiffness and stability than I-beam, and its torsional and flexural properties are better than I-beam.

? 2. The upper and lower flange plates of H-beam are much wider than I-beam in appearance.

? 3. Technically, H-beams can be hot rolled or welded, and I-beams are all hot rolled.

Many friends can't tell which is channel steel and which is C-beam. Salespeople are usually asked whether C-beam is channel steel, but there is a big difference between the two kinds of steel. You can make a clear distinction by the following points.

First of all, C-beam is cold-formed by hot-rolled plate, which has high strength and good toughness. Compared with channel steel, 30% of raw materials can be saved by manufacturing the same strength. Channel steel is directly sold by iron and steel company, with large thickness and trough-shaped cross section.

Secondly, C-section steel is usually used for building components such as wall beams, purlins or supports of steel structures, and is widely used in mobile homes and mechanical light industry manufacturing. Channel steel is mainly used in building structures, vehicle manufacturing and other industrial structures, and is usually used in combination with I-beams. Although these two steels are both used in building structures, they are used in different ways.

Finally, there are many classifications of C-beam, including: galvanized, hot-dip galvanized cable tray, glass curtain wall, unequal edge, inner roll, automobile profile and so on. Channel steel can be divided into: light channel steel, common channel steel, hot-rolled flexible channel steel, cold-formed equilateral/unequal channel steel and cold-formed inner and outer hemmed channel steel.