What is the appearance standard of Q235B steel plate?

Standard thickness, length and total width of Q235B steel plate are strongly recommended, as well as tolerance.
Thin thickness error is generally 0.05mm, width error is generally 5mm, the thickness of the plate is generally in the middle of 0.4-3.2.

The appearance of Q235B steel plate: galvanized steel plate should have excellent appearance and no disadvantages harmful to the application of the product, such as no plating, holes, cracks and sludge, beyond the plating thickness, abrasion, chromic acid stains, white rust, etc.

Physical properties of Q235B steel plate:
(1) the compressive strength test, generally speaking, only the construction, drawing and deep drawing of galvanized steel plate has the compressive strength characteristics.
The structure of galvanized steel plate is provided with yield limit, compressive strength and elongation, etc.
Lashen only specifies the elongation.

(2) Bending test: Bending test is a key new project to consider the performance of metal sheet. It is generally stipulated that after galvanized steel sheet is bent for 180, there can be no zinc layer on both sides of the surface, and there can be no cracking and cracking of the plate base.