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Galvanized strip is a long and narrow cold-rolled or hot-rolled steel strip that is coated with a layer of zinc by hot-dip galvanizing process. This material has good corrosion resistance and is widely used in fields such as construction and manufacturing. For example, it can be used to make light steel keels and metal shelves.
| Type of Galvanized Sheet | Chemical Composition | Performance Data | Application Fields |
|---|---|---|---|
| Hot - dip Galvanized Steel (GI) | Mainly contains iron (Fe) as the base metal, and the zinc coating is the key component with relatively high zinc content in the coating | It has excellent corrosion resistance. The zinc layer can form a dense oxide film in the air. Mechanical properties such as tensile strength, yield strength and hardness are similar to those of the base steel before galvanizing, while the galvanizing process may affect the ductility to some extent. It has relatively good weldability, but appropriate welding techniques and parameters are required during welding | Construction industry (steel structures, roofs, walls, support structures, metal fences, guardrails, scaffolding), automotive industry (body parts, chassis components, interior and exterior trim parts), electrical appliance industry (refrigerators, washing machines, air conditioners and other household appliance shells) |
| Galvannealed Steel (GA) | Based on iron, and the coating is a zinc - iron alloy layer formed by heating hot - dip galvanized steel to about 500 °C for the reaction between zinc and iron. The iron content in the alloy layer is usually between 7% and 15% | It has better paint adhesion than ordinary hot - dip galvanized steel. It has good formability, suitable for processing various complex shapes. After forming, the alloy layer can still maintain good adhesion and corrosion resistance. Although the corrosion resistance is slightly lower than that of pure zinc - coated hot - dip galvanized steel in some extreme environments, it is still good in general use environments | Automobile manufacturing (body panels, structural parts, parts requiring painting such as car doors, hoods, fenders), appliance industry (production of high - quality household appliances requiring good paint adhesion and appearance such as high - end refrigerators, dishwashers, microwave ovens) |
| Electrogalvanized Steel (EG) | The base metal is iron, and the coating is a layer of zinc deposited on the steel surface through an electrochemical process. The zinc coating is relatively thin compared with hot - dip galvanized steel | It has a very smooth and uniform surface with high surface finish and excellent appearance quality. Its corrosion resistance can meet the requirements in some relatively mild environments, but additional anti - corrosion measures may be needed in harsh corrosive environments. It has good processing performance, easy to be cut, punched, bent, etc. | Electronic industry (computer cases, mobile phone shells, electronic components), light industry (metal furniture, office supplies, metal decorations) |
| High - Strength Galvanized Steel | In addition to iron and zinc, it may also contain alloying elements such as manganese (Mn), silicon (Si), chromium (Cr), nickel (Ni) to improve its strength and other properties. The content and ratio of these alloying elements are precisely controlled according to different strength requirements | It has higher tensile strength, yield strength and hardness than ordinary galvanized steel. The corrosion resistance is similar to that of ordinary galvanized steel, but in some high - strength applications, special attention should be paid to the corrosion protection of the steel due to the higher stress and potential for local corrosion. The formability may be slightly lower than that of ordinary steel due to the addition of alloying elements, but it can still be processed into various shapes through appropriate processing techniques and process control | Construction of high - rise buildings and bridges (high - rise building structures, bridge cables, support structures), mechanical engineering (heavy machinery, construction machinery, mining equipment such as excavator booms, crane hooks, mining conveyor belts) |
| Aluminum - Zinc Alloy Coated Steel (AZ) | Consists of iron as the base metal, and the coating is an alloy layer mainly composed of aluminum (Al) and zinc (Zn). The typical aluminum content is about 55%, and the zinc content is about 43.4%, with a small amount of other elements such as silicon (Si) | It has extremely high corrosion resistance, much better than ordinary hot - dip galvanized steel. The aluminum in the coating can form a dense oxide film with strong resistance to oxidation and corrosion, and can maintain good performance in harsh corrosive environments such as coastal areas and industrial areas. It has good heat resistance, and the coating can maintain good stability at high temperatures. The aluminum - zinc alloy has a certain self - healing ability in case of local damage to the coating | Roofing and wall materials (roofs and walls of buildings, especially in areas with high corrosive environments or buildings requiring long service lives such as coastal buildings, chemical plants, power plants), agricultural and horticultural facilities (agricultural greenhouses, livestock sheds) |
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Shanghai, China
Shanghai Iron and Steel Group will continue to adhere to the concept of innovative, green and high-quality development, continuously improve its core competitiveness, and contribute more to the progress and development of the global steel industry. The product range is complete, and it can produce ordinary and high-quality carbon structural steel plates, steel coils, round steel, steel bars, low-alloy high-strength structural steel plates, steel coils, round steel, steel bars, etc., which are widely used in shipbuilding, marine engineering, construction machinery, petrochemical, wind power, bridge construction, pressure vessels, molds and other fields.
