October 10, 2022
(1) Tensile test:
①Performance 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. Stretching requires only elongation. See product standards in "8" of this section for specific values;
② Test method: the same as the general test method of thin steel plate, see the relevant standards provided in "8" and the test method standard listed in "ordinary carbon steel sheet".
(2) Bending test:
Bending test is the main item to measure the process performance of sheet metal, but the requirements of various galvanized sheet metal standards are not consistent. The American standard does not require bending and tensile test except for structural grade. In Japan, bending tests are required in addition to structural grade, building corrugated board and general corrugated board.
Requirements: general requirements galvanized sheet bending 180, the outer surface shall not have zinc layer detachment, plate base shall not have cracking and fracture.
