How to Choose Galvanized Sheet Roll

The requirements for high-quality galvanized sheets include specifications, surface, galvanizing amount, chemical composition, plate shape, machine function and packaging. oubo Steel Group will conduct comprehensive inspections of the goods before shipment. Ensure customers receive satisfactory products.

1.Packaging

Before Packaging	After Packing	Before Packaging	After Packing
There are two types of galvanized sheets cut to length and galvanized sheet coil packaging. It is generally packed in iron sheets, lined with moisture-proof paper, and tied with an iron waist on the outside. The fastening is firm to prevent the galvanized sheets inside from rubbing against each other.

2. Standard Sizes

The thickness, length and width of galvanized sheet coils are listed before packaging.

3. Surface

Due to the coating process and other surfaces of galvanized sheets, such as ordinary zinc flowers, fine zinc flowers, flat zinc flowers, no zinc flowers and phosphating treatment, etc. Galvanized sheets and galvanized coils cut to fixed lengths must not have shortcomings that affect their use.

4. Galvanizing Amount

The thickness of the zinc layer will be tested before the galvanized sheets leave the factory. There are two types: the same amount of galvanizing on both sides (i.e. equal thickness galvanizing) and the unequal amount of galvanizing on both sides (i.e. differential thickness galvanizing). The unit of galvanizing amount is g/m2.

5. Machine Function

(1) Mechanical experiment: Tensile strength test, yield strength test and impact test will be carried out on galvanized sheet coils.

(2) Bending test: It is required that after the galvanized plate is bent 180o, the zinc layer on the outer coating shall not leave, and the base of the plate shall not have cracks or breaks.

6． Chemical Composition

The requirements for the chemical composition of galvanized substrates are required to comply with the grade standards of the substrates.

7. Plate Shape

The flatness of the board is within the range required and specified by the customer.