Galvalume steel is a kind of steel which is coated with aluminum and zinc alloys to protect the metal from rust. The coating consists of 55% aluminium, 43.4% zinc and 1.6% silicon. Due to this composition, it is highly effective in protecting other base metals from corrosion and rust. The service life of GL steel is more than 30 years under normal conditions.
What Does Galvalume Steel Look Like?
The surface of the galvalume steel coil is smooth, silver-white color and with uniform spangles. Compared to galvanized steel coil, its spangles are more even. Its beautiful appearance makes it can be used directly in many applications without decoration.
Features Of Galvalume Steel
1. Strong Corrosion Resistance
When compared to galvanized metal, Galvalume steel has better corrosion resistance. Galvalume coating combines the toughness and strength of zinc with the rust resistance of aluminium. When the zinc coating is worn, aluminum will form a dense aluminium oxide layer to prevent corrosion from the interior. Research shows that it can last as long as 50 to 60+ years.
2. Strong Resistance to High Temperature
The galvalume steel has excellent high-temperature resistance, which can withstand temperatures of more than 300 degrees. At 450 °C, extremely high reflectivity can be guaranteed. Above 480°C, the appearance of the coating becomes grey. When the temperature is as high as 650°C, the protective layer to prevent oxidation of the galvalume steel plate is still well preserved, and no peeling is seen. That’s why it can be used in many household appliances, such as gas stoves, air conditioners, electronic microwave ovens, etc.
3. High Heat Reflectivity
At a high temperature of 480 degrees Celsius, the aluminium plate can reflect 80% of the incoming heat, which is twice that of the galvanized steel. Therefore, the aluminized sheet can be made into an efficient heat insulation barrier or a heat reflector in high temperature applications. That’s why galvalume steel is a better choice for hot climates.
4. Economical Solution
The density of 55% AL-Zn is lower than that of Zn. Therefore, in the case of the same weight and the same thickness of the galvanized layer, the area of the galvalume steel is more than 3% larger than that of the galvanized steel. In addition, at the same high temperature of 480°C, the strength of galvalume steel sheet is 10 times that of aluminum sheet, so the thickness of the steel sheet can be reduced by at least 30%.
Applications of Galvalume Steel
Galvalume steel is often popular in our daily life to protect iron-based alloys that are prone to rust. For example:
1. Construction industry: galvalume roofing sheets, exterior walls, garage doors, fences, shutters of civil and industrial buildings.
2. Home appliance industry: ovens, explosion-proof strip steel, outer covers of air conditioning and ventilation systems, solar water heaters, electrical components.
3. Automobile industry: automobile silencers, exhaust pipes and heat shields of catalytic converters, automobile body bottom parts, road signs.
4. Industrial instruments: electric control cabinets, industrial freezers, vending machines.
5. Other uses: Thermal insulation cover, heat exchanger, dryer, water heater, etc.
Also, galvalume steel is the base metal of PPGL steel.
If you are working on a project that will require the use of galvalume steel coils, it is important to use products which are long-lasting. The coils that you use should be weather-resistant, and capable of resisting corrosion and rust. Wanzhi Steel is a company that has been offering quality steel products from China for many years. They have built relationships with hundreds of different contractors that are very happy with their products.
If you need a supplier for quality galvalume steel coil, you need to look no further than Wanzhi Steel. It is a business that you can trust. From coils to steel sheets, and corrugated panels, you can find everything you may want. On their website, you can learn more about this company and the many products that they make available. It is possible to contact them by email, phone, or simply chat with the representative online.
