S220GD+Z is a type of hot-dip galvanized structural steel, widely used in construction and manufacturing industries due to its balance of strength, formability, and corrosion resistance. This steel grade is produced according to European standard EN 10346, which specifies continuous hot-dip coated steel flat products, particularly designed for forming and structural purposes.
Key Characteristics of S220GD+Z
Mechanical Properties
S220GD+Z has a minimum yield strength of 220 MPa, providing a moderate level of strength suitable for forming and structural applications. It is less robust than higher-grade steels, such as S350GD, but its yield strength allows it to be easily shaped and formed without cracking. This makes it ideal for components that don’t bear heavy loads but require some structural integrity.
Galvanized Coating (Z)
The “+Z” designation in S220GD+Z refers to a zinc coating applied through a hot-dip galvanization process. This zinc layer acts as a protective barrier, safeguarding the steel from corrosion and enhancing its longevity, especially in outdoor or humid environments. Zinc coatings vary in thickness, and the most appropriate coating weight is chosen based on the steel’s intended use and exposure conditions.
Formability
The relatively lower yield strength of S220GD+Z provides high flexibility for forming processes, including bending, stamping, and deep drawing. This steel grade is designed to be both tough and adaptable, making it popular for applications requiring a balance between strength and workability.
