#Conversion of steel sheet from gauge to mm:

সাধারণত বিভিন্ন প্রকার মেটাল সিট আমরা গেজ এ হিসাব করে থাকি। নিচে গেজ এর নম্বর অনুসারে শিট এর থিকনেস চার্ট দেওয়া হল-

What are the different types of steel plates used for construction? 

1. Checkered Plates
2. Galvanized Plates 
3. Mid Steel Plates
4. B.I. and G.I. Plates 

Steel plate is the term used for any steel material formed into a plate. This is one of the most versatile metal materials as it comes in various widths, lengths, and finishes. Steel plates can also be further fabricated into various shapes. Depending on how these steel plates are fabricated, they can be used for diverse and complex construction applications — mainly for structural support and sections. 

There are numerous types of steel plates used for construction. Each steel plate has its own set of properties that vary from anti-corrosion factors to the ability to stand at different temperatures. Steel plates in the construction of bridges, railways, warehouses, and buildings. Given that each construction project is unique, choosing the right steel plate specification is crucial. 

Continue reading to learn about the different kinds of steel plates for construction. 

Checkered Plates

Checkered steel plates are characterized by the raised angular patterns on the sheet’s surface. These raised patterns provide more grip to the entire surface of the plate. This makes it easier to move around while being used.

Due to the checkered steel plates’ texture, people experience fewer skids and slips. That’s why it’s the ideal material for walkways and pathways, both for people and vehicles. You can see this steel plate in parking flooring, elevator flooring, and industrial stairs. Its texture makes it safer and more secure to move around. 

Aside from flooring, you can find this steel plate used as corner guards for the walls and door kick plates. 

Checkered plates are also easy to maintain. Its surfaces are resistant to many unwanted elements like dirt, oils, dust, and various liquids. 

Galvanized Plates 

Galvanized steel plates are characterized by their strength and resistance to corrosion. With galvanization, the steel is submerged into molten zinc to add an extra layer of strength. Despite its strength, it is still possible to mold galvanized plates into different forms. This makes it ideal for many projects. 

Galvanized plates also have higher resistance to wear and tear, thanks to an extra layer of zinc. Because of this, these steel plates can handle varying temperatures. That’s why it’s used in different household appliances like hot water heaters. 

It is also a common choice for sheds and roofings, like corrugated roofing sheets. It is also used for automobiles because of its durability and long lifespan. You can expect galvanized steel plates to last a few decades since it takes a while for the anti-corrosive treatment to wear off. 

Galvanized sheet is a steel sheet that has received a specific treatment consisting of hot galvanizing. As such, The steel is immersed in a zinc crucible, so that the sheets are fully covered with this metal.

Sometimes, depending on the specific sheet, the immersion may have been carried out in a zinc-iron alloy. In any case, when carried out hot, it fully adheres to the steel, so steel and bath become inseparable. This is especially the case in the case of the zinc-iron alloy, which prevents chipping to a greater extent.

Therefore, it presents an inner sheet of steel that constitutes the thickness of the sheet, but also a zinc coating which gives it that characteristic galvanization. Thus, the steel is fully protected from contact with external and atmospheric agents.

In any case, it has the same capacity to be cut, drilled and punched as any other type of steel sheet. The main difference is the presence of a new metal layer that acts as a protector for the steel body.

The defining characteristics of this type of sheet metal

From what was said in the previous section, many characteristics of the veneer galvanized steel. However, as a clearer and more schematic presentation, we can talk about the following.

• It is not a sheet made exclusively of steel. Although most of its mass is made of steel, the outer layer is made of other metals. Typically, this is zinc (Z) and, in some cases, a zinc-iron alloy (ZF).
• It presents great flexibility in terms of its applications. This is because it allows cutting, drilling, profiling, etc. In fact, we we cut, fold and punch to size.
• In order to guarantee its quality, functionality and durability, it is strictly regulated by European standards. The EN 10346 standard establishes guidelines regarding the thickness of the protective layer, the greater or lesser purity of zinc and the galvanization process.

The main advantages of its use

What is really sought with the galvanization of steel? There is no better way to answer this question than by presenting the advantages of this type of sheet, which derive from its coating.

• Excellent corrosion protection. This allows its use in industries where it is treated with chemicals or harmful products.
• Hermetic separation against external atmospheric agents. Therefore, it can remain outdoors for a long time.
• Greater durability and resistance of the sheet. In this way, investing in it always ends up being profitable through amortization.
• Increase in hardness. Prevents impact chipping and chipping.
• Aesthetic appearance and regular appearance. In this way, they do not require too many subsequent finishes after installation.

This type of steel sheet has an almost unlimited number of applications. However, we can highlight the following.

• In the construction. Especially for the production of light metal structures and thermal insulation. Also for structural elements of medium and low height construction, entrance doors and elevators. Likewise, its use can be found in the manufacture of reinforcement profiles for plastic doors and PVC windows and for European-type fixings for plates made of different materials such as plaster.
• In the automotive sector. Especially to manufacture internal and external body parts. Likewise, it allows the exterior parts of public transport such as buses and trams to be repaired easily and quickly.
• In the mechanical industry and in machinery manufacturing. This must be understood in a broad sense. It includes the manufacturing of electrical equipment boxes, household appliances, mechanical equipment, packaging and measuring devices, etc.
• In the manufacture of articles intended for domestic use.​ From tableware to tanks, through containers of all kinds, buckets and baths. Its uses in this area are practically unlimited.

What other types of sheets exist and how do they differ from galvanized steel?

Once you know galvanized steel sheets in depth, it is now convenient to distinguish them from other types of sheet.

• Carbon-manganese structural steels. It has balanced characteristics, with minimum levels of elastic limit and tensile strength. It has acceptable ductility and ease of welding and good toughness properties.
• Steel sheets with oxidation. Rusting of steel is voluntarily caused for decorative purposes. In this sense, it completely lacks the external protection that galvanizing offers.
• Laser badges. They stand out especially for their excellent weldability. They have great resistance to fatigue and toughness.
• Hot rolled and pickled sheets. They do not have any particular exterior protection, so they can rust more easily. They can be protected, at least temporarily, with oil.
• Cold rolled and polished sheets. They have a greater ductile and cold handling capacity, making it easy to deform them to taste. In return, they sacrifice some stamina.

Galvanized Palvanized steel plates are characterized by their strength and resistance to corrosion. With galvanization, the steel is submerged into molten zinc to add an extra layer of strength. Despite its strength, it is still possible to mold galvanized plates into different forms. This makes it ideal for many projects. 

Galvanized plates also have higher resistance to wear and tear, thanks to an extra layer of zinc. Because of this, these steel plates can handle varying temperatures. That’s why it’s used in different household appliances like hot water heaters. 

It is also a common choice for sheds and roofings, like corrugated roofing sheets. It is also used for automobiles because of its durability and long lifespan. You can expect galvanized steel plates to last a few decades since it takes a while for the anti-corrosive treatment to wear off. 

Mild Steel Plates

Mild steel plates are the most popular plates in the construction industry because of their versatility and ease of use. It is a type of carbon steel and comes in different thicknesses.  

These plates can easily be welded or formed into different shapes. This makes it useful when construction companies create structures and sections. It can also be cut and bent into different shapes, making it easy to form different steel structures and various equipment. 

On top of that, mild steel plates don’t require special tools to cut or remove sections of plates. 

You’ll see mild steel plates used for many construction and industrial purposes. It can also be used in the shipping industry to make offshore equipment. It is also used in the construction of various infrastructures like warehouses, buildings, bridges, and transport terminals. 

B.I. and G.I. Plates 

Black Iron (B.I.) and Galvanized Iron (G.I) Plates are two common steel plates used in construction. G.I. sheets are characterized by their protective metallic coating to prevent corrosion. On the other hand, B.I. sheets are made with copper and aluminum. 

Both the steel plates are coated with zinc on all of their sides, just like the galvanization process. In addition to that, electric galvanizing also takes place. This is an electrical current that is passed through the sheet once zinc is applied. This gives it more resistance and strength to the various elements. 

Application of G.I. Steel Plates

• Appliances. Its durable yet lightweight material makes it a good material for many household appliances. 
• Doors and Wall Panels. Its flat surfaces are ideal for creating the panels needed for both commercial buildings and residential homes. 
• Roofing. The protective coating of zinc makes it ideal for the roof since it is resistant to various elements. 

Application of B.I. Steel Plates

• Billboards. The look of B.I. sheets makes it an ideal choice for outdoor advertisements. 
• Air Conditioning Systems. Its resistance to corrosion and lightweight factor makes it perfect for cooling systems. 
• Automotive. Its sturdiness and thickness make good material for cars.