Q235B/Q355B galvanized steel strip is made of high-quality carbon structural steel, of which Q235B represents B-grade steel with a yield strength of 235MPa, while Q355B represents B-grade steel with a yield strength of 355MPa. This steel has high strength and good toughness and can withstand large loads.
The dense protective layer and electrochemical sacrificial anti-corrosion effect form an excellent anti-corrosion layer to protect steel. Long-term anti-corrosion effect, no maintenance required, is the most economical long-term anti-corrosion method. Iron and zinc react to form an alloy, strong adhesion, impact resistance, friction and not easy to peel off.
DX51D, DX52D, DX53D, and DX54D are the classifications of continuous hot-dip galvanized steel sheets and strips in European standards (EN), where "D" stands for hot-dip galvanizing. Different numbers represent different performance levels. Generally, the larger the number, the better the elongation performance and other indicators12. "Z" stands for hot-dip galvanized layer, and is usually followed by a number such as z40, z60, z100, etc. The number represents the weight of the galvanized layer in g/m². The larger the number, the thicker the galvanized layer and the better the corrosion resistance.
In a corrosive environment, zinc will corrode before steel, thus protecting the steel base. In addition, the zinc layer will form a certain protective film in terms of corrosion resistance, preventing excessive oxidation and slowing down the corrosion rate. It can also further prevent steel corrosion by applying zinc powder paint during maintenance, ensuring the mechanical properties and other safety properties of the material. Other characteristics: hot-dip galvanizing has stable chemical composition, pure steel, excellent dimensional accuracy, high coating control accuracy, excellent coating performance, and good welding performance.
S280GD+Z, S350GD+Z and S450GD+Z galvanized steel strips have distinct differences in hardness, performance and use. S280GD+Z is suitable for demanding applications that require heavy loads, S350GD+Z is suitable for medium loads and low manufacturing costs, while S450GD+Z is widely used in various industrial fields due to its thickness deviation and dimensional characteristics, especially automotive steel hot-dip galvanizing and zinc-iron alloys. The choice of these steels depends on the specific application needs and performance requirements.
Hot dip galvanized steel coil has good forming performance, paintability and weldability, and is suitable for forming processes such as stamping and bending. It is an environmentally friendly resource because of its strong corrosion resistance, low environmental cost and 100% recyclability.
