The chemical composition of the A143/A143M-07(2014) steel grade refers to the elements and their respective percentages present in the steel. This composition determines the steel’s properties and performance. The mechanical properties of the steel grade refer to its strength, hardness, flexibility, and other characteristics under applied forces. These properties are tested and specified in the A143/A143M-07(2014) standard. The standard number provides a reference for manufacturers, engineers, and other stakeholders to ensure consistency in the production and use of the steel grade. Corresponding to the A143/A143M-07(2014) steel grade means relating or matching to this specific steel grade.