Tensile test method. Common standard inspection methods include GB/T228-87, JISZ2201, JISZ2241, ASTM A370 ГОСТ 1497, BS18, DIN50145, etc;

Performance indicators: generally speaking, only structural, tensile and deep drawing galvanized sheets have tensile performance requirements. The galvanized sheet for structure shall have yield point, tensile strength and elongation, etc; Only elongation is required for stretching. See relevant product standards in "8" of this section for specific values.

The specification of angle steel is expressed by the dimension of side length and side thickness. At present, the specification of domestic angle steel is 2-20, and the number of centimeters of side length is taken as the number. The same angle steel often has 2-7 different edge thicknesses. The imported angle steel shall be marked with the actual size and thickness of both sides and relevant standards.

Performance indicators: generally speaking, only structural, tensile and deep drawing galvanized sheets have tensile performance requirements. The galvanized sheet for structure shall have yield point, tensile strength and elongation, etc; Only elongation is required for stretching. See relevant product standards in "8" of this section for specific values.

The increase of domestic consumption of galvanized sheet is mainly driven by imports. In recent years, the import of galvanized sheet has increased year by year. The main imported varieties are galvanized sheet, but the proportion of galvanized sheet imports has decreased year by year; Accordingly, the import proportion of hot-dip galvanized sheet has increased year by year. In 2003, the import volume of hot-dip galvanized sheet exceeded that of electrogalvanized sheet for the first time in China.