After many tests, our technical team has successfully developed the highest stamping grade IF steel for domestic automobiles. It is understood that DX57D+Z steel is the highest grade of galvanized ultra-deep drawing IF steel with excellent forming performance. It is mainly used for the production of automobile parts with complex deformation, such as inner and outer panels of automobiles. It has the characteristics of good mechanical properties, uniform performance of the whole roll, and strong anti-powdering ability of the coating.