Structural steel is a category of steel used for making construction materials in a variety of shapes. Structural steel shapes, sizes, chemical composition, mechanical properties such as strengths, storage practices, etc., are regulated by standards in most industrialized countries. One category is the micro alloyed variants. The structural steels are produced by all Ovako mills and come in different executions such as bar, tube and rings. General structural steel is also often base for hard-chrome plated products.