The difference between square tube and square steel

Square steel, solid, belongs to bar. Generally, it is made by hot rolling, and deep processing can be made into round steel, anchor bolts, etc., which are used to make rails.

Square tube, hollow, belongs to tube. Generally, there are round chamfers, and the quality is lighter than that of steel. The small diameter is generally cold rolled, and the large diameter is generally welded and assembled to make the structure