Is the channel 20 the same as the channel 20b?

Answer:

In use, it requires better welding, riveting performance and comprehensive mechanical properties. The raw material steel billet for channel steel is carbon or low alloy steel billets with a carbon content of not more than 0.25%. The finished channel steel is delivered by hot forming, normalizing or hot rolling.

The specifications are expressed in millimeters of height (H) * leg width (b) * waist thickness (d), such as 100*48*5.3, which means waist height is 100 mm, leg width is 48 mm, waist thickness is 5.3 mm channel, or 10# channel steel. The same height of the channel, if there are several different leg width and waist thickness, also need to add a, B, C on the right side of the model, such as 22#a, 22#b and so on.

[channel steel] used for construction and mechanical use of carbon structural steel, is a complex cross-section of steel section steel, its cross section shape is concave. Channel steel is mainly used in building structure, curtain wall engineering, mechanical equipment and vehicle manufacturing, etc..

No, channel 20, a and B two.20A specifications are: 200*73*7.0, weight per meter is 22.637kg20b specifications are: 200*75*9.0, weight per meter is 25.777kg