Product description

Galvanized Steel 0.18mm-20mm thick galvanized steel sheet 2mm thick Hot dip galvanized steel sizes galvanized sheet metal roll

Product chemical component

Galvanized Steel 0.18mm-20mm thick galvanized steel sheet 2mm thick Hot dip galvanized steel sizes galvanized sheet metal roll

(1) surface state: The surface state of galvanized sheet is different because of the different treatment methods in the coating and plating process, such as ordinary zinc flower, fine zinc flower, flat zinc flower, zinc free flower and phosphating surface. The German standard also provides for surface grades.

(2) Galvanized plate should have a good appearance, shall not have harmful defects to the use of the product, such as no plating, holes, cracks and scum, more than thick plating, abrasion, chromic acid dirt, white rust, etc. Foreign standards are not very clear about the specific appearance defects. Some specific defects should be specified in the contract when ordering.

(1) Tensile test:

(1) Performance indicators: generally speaking, only structural, tensile and deep drawing galvanized sheet has tensile performance requirements. The structure of galvanized sheet requires a yield point, tensile strength and elongation, etc. Elongation is required only for stretching. For specific values, see relevant product standards in "8" of this section;

② Test method: the same as the general sheet steel test method, see the relevant standards provided by "8" and the test method standards listed in "ordinary carbon steel sheet steel".

(2) Bending test:

The bending test is the main item to measure the technical performance of thin plate, but the requirements of various galvanized sheet are not consistent, the American standard in addition to the structural level, the rest do not require bending and tensile test. And Japan in addition to structural level, building corrugated plate and general corrugated plate, the rest are required to make bending test.

Requirements: General requirements galvanized sheet bending 180, the outer surface of the zinc layer shall not be separated, plate base shall not crack and fracture.