Hot formed steel sections refer to end products which were formed at a temperature higher than the steel's recrystallization temperature. A solid piece of steel (like billets, blooms or slabs) is heated to a temperature higher than its recrystallization temperature. It is then send through sets of dies or rolls, known as passes, forming the billet, bloom or slab to the required form. After the section is formed it is left to cool down, during which it will recrystallize. One major advantage of hot forming a steel section rather than to cold form it, is that the force required is much lower.
Hot formed sections include I-beams, equal and unequal flanged channels, cross-sections, etc. The following are a few advantages and disadvantages of hot formed sections, in comparison with cold formed sections: