VRB Enterprises

Vaishali, Ghaziabad, Uttar Pradesh

Galvannealed steel sheets (GA) are produced by reheating the galvanized layer to spread the galvanized zinc and iron materials on the surface to re-coagulate a thin light gray layer of steel-iron alloy. The alloy layer contains about 10% of iron, and compared to pure zinc has less ionization and is stronger in terms of limited surface corrosion. GA is most commonly used in cars that require high-corrosion resistance after spot welding and stamping.

Applications : Automobile parts, as well as internal and external panels for refrigerators, washing machines, air conditioners, and etc.

Electrolytic Galvanized Steel Sheets (EGI) is produced by electrogildingzinc with cold-rolled steel sheets (CR) to enhance corrosion resistance, and while it has less zinc gilded than hot-dip galvanized steel sheets (GI), the gilded layer is even and the surface clean and maintains the mechanical characteristics of CRs because the gilding is done at a low temperature.

Application : Building exterior roofing and walls, heating panels, boilers, pipes, premium fences, distribution panels, refrigerator back plate, DISPLAY, home appliance parts, and etc.

Galvalume Steel Sheet_Aluminum-Zinc Alloy Coated Steel Sheets (GL) are galvanized steel sheets with both zinc and aluminum, and is the ideal combination of anti-corrosion and alkali-resistance of zinc, and the durability, heat-resistance, and acid-resistance of aluminum. The galvanized layer is consisted of 55% of aluminum and 43.3% of zinc and 1.6% of silicon per weight, and 80% aluminum in terms of volume ratio, so while the advantages of aluminum is well preserved zinc prevents the risk of red rust on the surface, a weakness of aluminum, and the product combines the strengths of both materials.

Applications : Building exterior roofing and walls, heating panels, boilers, pipes, premium fences, distribution panels, refrigerator back plate, DISPLAY, home appliance parts, and etc.

Hot-dip galvanized steel sheets (GI) are produced by passing the full hard sheet which has undergone the acid washing process and rolling process through the zinc pot, thereby applying zinc film to the surface. GI has a thicker galvanized layer which has excellent anti-corrosion qualities, and is the type of steel sheet used most commonly.

Applications : Home appliance, automobile parts, steel house, construction frame, interior/exterior construction materials, and etc.

Hot-dip galvanizing is a form of galvanization. It is the process of coating iron, steel, or aluminum with a thin zinc layer, by passing the metal through a molten bath of zinc at a temperature of around 860 °F (460 °C). When exposed to the atmosphere, the pure zinc (Zn) reacts with oxygen (O2) to form zinc oxide (ZnO), which further reacts with carbon dioxide (CO2) to form zinc carbonate (ZnCO3), a usually dull grey, fairly strong material that stops further corrosion in many circumstances, protecting the steel below from the elements. Galvanized steel is widely used in applications where rust resistance is needed, and can be identified by the crystallization patterning on the surface (often called a "spangle").

Application of GP Steel is as below : Automobile, Roofing and Cladding Ducting, Purlins/PEB, Panels, Pipes and tubes, General Engineering.

• The process of hot-dip galvanizing results in a metallurgical bond between zinc and steel with a series of distinct iron-zinc alloys. The resulting coated steel can be used in much the same way as uncoated.
• Galvanized steel can be welded; however, one must exercise caution around the resulting zinc fumes. Galvanized steel is suitable for high-temperature applications of up to 392°F (200°C). The use of galvanized steel at temperatures above this will result in peeling of the zinc at the intermetallic layer.
• Electrogalvanized sheet steel is often used in automotive manufacturing to enhance the corrosion performance of exterior body panels, this is however a completely different process.
• Lead is often added to the molten zinc bath to improve the fluidity of the bath (thus limiting excess zinc on the dipped product by improved drainage properties), helps prevent floating dross, makes dross recycling easier and protects the kettle from uneven heat distribution from the burners.
• Lead is either added to primary Z1 Grade Zinc or already contained in used secondary zinc. A third, declining method is to use low Z5 Grade Zinc.
• Steel strip can be hot-dip galvanized in a continuous line. Hot-dip galvanized steel strip (also sometimes loosely referred to as galvanized iron) is extensively used for applications requiring the strength of steel combined with the resistance to corrosion of zinc. Applications include: roofing and walling, safety barriers, handrails, consumer appliances and automotive body parts. One common use is in metal pails.
• Galvanised steel is also used in most heating and cooling duct systems in buildings Individual metal articles, such as steel girders or wrought iron gates, can be hot-dip galvanized by a process called batch galvanizing.
• Other modern techniques have largely replaced hot-dip for these sorts of roles.
• This includes electrogalvanizing, which deposits the layer of zinc from an aqueous electrolyte by electroplating, forming a thinner and much stronger bond.

PPGI Sheets are sheets of pre-painted or pre-coated Steel that display high durability, and resistance against weather and UV rays from sunlight. As such, they are widely used as roofing sheets for buildings and construction. They do not undergo corrosion owing to atmospheric conditions and can be easily installed through a simple technique. PPGI Sheets are abbreviated from Pre-Painted Galvanised Iron. These sheets exhibit high strength and resilience and almost never leak or corrode. They are usually available in attractive colours and designs per preference. The metallic coating on these sheets are usually of Zinc or Aluminium. The thickness of this paint coating is usually between 16-20 microns. Surprisingly, PPGI Steel Sheets are very light weight and easy to manoeuvre.

Applications : Buildings like Detached Houses, Terraced Houses, Residential Multi-Storey Buildings, and Agricultural Constructions mainly have PPGI Steel Roofing. They can be fastened securely and they keep excess noise at bay.

What is CRCA Steel? CRCA is an abbreviation of “cold rolled close annealed”. This is a steel grade in which cold rolling is done after hot rolling and pickling, to reduce the thickness of steel. Cold rolling makes the material hardened. This cold rolled steelis then annealed in a close container where nitrogen or any other non-oxidizing gases softens it for use and also guards it from oxidation.

What is the application of CRCA steel : This type of steel sheet metal is mostly utilized in automobile and manufacturing industries for body and panel applications. This steel can be used in forming process and can also be utilized in a drawing process which transforms the shape of quadrilateral sheet to a beneficial 3D shape.