The main mechanical properties of galvanized sheet

Galvanized sheet refers to a steel sheet plated with a layer of zinc on the surface. Galvanizing is a frequently used economical and effective method of rust prevention, and about half of the world’s zinc production is used in this process. So, what are the main mechanical properties of galvanized sheet?
(1) Tensile test:

①Performance index: Generally speaking, only the galvanized sheet for structural, tensile and deep drawing has tensile performance requirements. Among them, the galvanized sheet for structural use requires yield point, tensile strength and elongation, etc.; for tensile use, only elongation is required. For specific values, please refer to the relevant product standards in “8” of this section;

②Test method: the same as the general thin steel plate test method, see the relevant standards provided in “8” and the test method standards listed in “ordinary carbon steel thin plate”.

(2) Bending test:

Bending test is the main item to measure the process performance of thin plate, but the requirements of various national standards for various galvanized sheets are not consistent. Except for structural grades, the American standard does not require bending and tensile tests. In Japan, except for structural grade, building corrugated board and general corrugated board, bending test is required.

Requirements: It is generally required that after the galvanized sheet is bent 180 degrees, the outer surface of the galvanized sheet must not have the zinc layer detached, and the plate base must not have cracks and breaks.

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