S250gd S350gd S550gd Galvanized sheet offers strength, durability and corrosion resistance and is commonly used in ductwork for HVAC (heating, ventilation and air conditioning) systems.
S250GD chemical composition:
C Carbon 0,20
Si silicon 0,60
Mn Manganese 1,70
Phosphorus 0,10
Sulfur 0,045
S250GD mechanical properties:
Yield strength: 250
Tensile strength: 330
Elongation: 19
Hot-dip galvanizing, also called hot-dip galvanizing, is a method of immersing steel components in molten zinc to obtain a metal coating. In recent years, with the rapid development of high-voltage power transmission, transportation, and communications, the protection requirements for steel parts have become higher and higher, and the demand for hot-dip galvanizing has also continued to increase.
The hot-dip galvanizing layer is formed by zinc in a high-temperature liquid state in three steps:
1. The iron-based surface is dissolved by the zinc liquid to form a zinc-iron alloy phase layer;
2. The zinc ions in the alloy layer further diffuse to the matrix to form a zinc-iron miscibility layer;
3. The surface of the alloy layer is surrounded by a zinc layer.
Principle of electro-galvanizing:
Because zinc is not easy to change in dry air, but in humid air, a very dense basic zinc carbonate film can be formed on the surface, which can effectively protect the interior from corrosion. And when for some reason, the coating is damaged and a small steel base is exposed, the zinc and the steel base form a micro-battery, so that the steel base becomes the cathode and is protected.
1. The zinc coating is thick, has fine, uniform crystallization and no pores, and has good corrosion resistance;
2. The zinc layer obtained by electroplating is relatively pure, corrodes slowly in acid, alkali and other mist, and can effectively protect the steel matrix;
We are the leading galvanized steel sheet manufacturer and distributor in China which have been engaging in the field produced for 16 years with 16 years export experience.
The application of hot-dip galvanizing has also expanded correspondingly with the development of agriculture. Therefore, hot-dip galvanized products are widely used in industry (such as chemical equipment, petroleum processing, ocean exploration, metal structures, power transmission, shipbuilding, etc.), agriculture (such as sprinkler irrigation, heated rooms), and construction (such as water and gas transmission, wire casing). , scaffolding, houses, etc.) bridges, transportation, etc., it has been widely used in recent years. Since hot-dip galvanized products have the characteristics of beautiful appearance and good corrosion resistance, their application range is becoming more and more extensive.
GNEE has been committed to providing customers with high-quality steel materials. Its best-selling products include galvanized steel, cold-rolled steel, section steel, steel pipes, steel plates, special-shaped steel, rails, construction steel, etc. The products cover steel structure engineering, nuclear power engineering, ocean engineering, construction bridge engineering, engineering machinery and equipment production, metallurgical equipment production and other fields.
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