This specification covers steel sheet in coils and cut lengths coated with zinc-aluminum-magnes
ium alloy by hot-dip process intended for applications requiring corrosion resistance and paintability. The steel sheet shall be produced in the following designations: commercial steel (CS types A,B,C), forming steel (FS type A and B), deep drawing steel (DDS), extra deep drawing steel (EDDS), structural steel (SS), high strength low alloy steel (HSLAS), and high strength low alloy steel with improved formability (HSLAS-F). Structural steel and high strength low alloy steel shall be available in several grades based on mechanical properties such as yield strength, tensile strength, and elongation. Structural steel Grade 50 [340] shall be available in four classes based on tensile strength. The coating weights [masses] shall conform to the specified requirements determined by triple-spot and single-spot tests. The coating bath composition and the method of estimating the coating thickness from the coating weight [mass] are given. Heat analysis of the base metal shall conform to the chemical requirements prescribed for carbon, manganese, phosphorous, sulfur, aluminum, copper, nickel, chromium, molybdenum, vanadium, columbium, and titanium. Bending properties of the base metal including minimum cold bending radii and cracks, and the coating bend test requirements are detailed.
This specification covers steel sheet in coils and cut lengths coated with zinc-aluminum-magnesium alloy by hot-dip process intended for applications requiring corrosion resistance and paintability. The steel sheet shall be produced in the following designations: commercial steel (CS types A,B,C), forming steel (FS type A and B), deep drawing steel (DDS), extra deep drawing steel (EDDS), structural steel (SS), high strength low alloy steel (HSLAS), and high strength low alloy steel with improved formability (HSLAS-F). Structural steel and high strength low alloy steel shall be available in several grades based on mechanical properties such as yield strength, tensile strength, and elongation. Structural steel Grade 50 [340] shall be available in four classes based on tensile strength. The coating weights [masses] shall conform to the specified requirements determined by triple-spot and single-spot tests. The coating bath composition and the method of estimating the coating thickness from the coating weight [mass] are given. Heat analysis of the base metal shall conform to the chemical requirements prescribed for carbon, manganese, phosphorous, sulfur, aluminum, copper, nickel, chromium, molybdenum, vanadium, columbium, and titanium. Bending properties of the base metal including minimum cold bending radii and cracks, and the coating bend test requirements are detailed.
