What is rebar? Characteristics and applications of rebar
Steel has become an indispensable and popular source of raw materials in many industrial fields, such as construction, manufacturing and production. For construction and production projects, the use of steel plays an important role in ensuring the safety and durability of products and works.
Today, there are many types of steel on the market, in which “rebar” is widely and popularly used. To better understand “rebar”, Trung Dung Steel will help you have a more general view through the article below:

1. What is rebar?
Rebar, also known as ribbed rebar, is one of the commonly used materials in the construction industry, with a long bar structure, each body usually has very special embossed ribs. Rebar is a steel mesh or steel bar. This type of steel is used in masonry and reinforced concrete structures to create additional strength to withstand load pressure. The surface of the rebar is often patterned to enhance the quality of the bond with concrete.
2. Types of rebar
2.1 Hot Rolled Bars (HRB): is a type of steel produced through the hot rolling process directly from billet, a square or circular steel bar with a larger diameter than steel wire. These are some of the main characteristics of hot rolled rebar
Mechanical properties:
High tensile strength: Hot rolled rebar often has high tensile strength, meaning it has the ability to withstand force and stretch well under the impact of forces.
Toughness: It has the ability to stretch and return to its original shape without excessive deformation.
Hardness: Depending on the specific chemical composition, hot-rolled rebar can have different hardnesses to meet different design requirements.
Durability and stability:
Hot-rolled rebar is often highly stable and durable, helping to ensure the safety and durability of structures and products using it.
Thus, hot-rolled rebar is an important structural material in the construction and industrial sectors due to its superior mechanical properties and wide applicability.

2.2 Cold Rolled Bars (CRB): This is a type of steel produced through the cold rolling process from rolled sheets with a smaller size than the billet. Below are the main characteristics of cold rolled steel bars:
Mechanical properties:
Hardness and tensile strength: Cold rolled steel bars usually have high hardness and good tensile strength, but are usually not as good as hot rolled steel bars.
Toughness: It has the ability to stretch and return to its original shape without excessive deformation, depending on the specific chemical composition.
Surface properties:
The surface of cold rolled steel bars is usually very smooth, so it is often not necessary to resurface after production, reducing processing costs and production time.
Thus, cold rolled steel bars are an important material in the industrial and mechanical industries thanks to their stable mechanical properties, high precision and wide applicability.
2.3 Galvanized Bars (GI): is a type of steel coated with a layer of zinc on the outside to protect against corrosion from the external environment. Below are the main characteristics of galvanized steel bars:
Production process:
Galvanized steel bars are produced by placing steel bars in a hot water tank containing zinc, then the surface of the steel will be coated with a protective zinc layer.
Mechanical properties:
Durability and corrosion resistance: The outer zinc layer helps protect the steel from corrosion from the external environment such as water, humid air and chemicals.
Toughness and strength: Galvanized steel bars still retain the mechanical properties such as toughness and strength like conventional steel bars.
Thus, galvanized steel bars are an important material in the construction and industrial sectors thanks to their high corrosion resistance and wide application. The outer zinc coating protects the steel from wear and tear and increases the life of the construction and industrial products that use it.
2.4 Stainless Steel Bars (SS): is a special type of steel alloyed with elements such as chrome, nickel and molybdenum to create corrosion resistance and heat resistance. Here are the main characteristics of stainless steel bars:
Corrosion resistance:
Stainless steel bars have higher corrosion resistance than conventional steels thanks to the protective oxide layer on the surface, preventing oxidation and corrosion from the surrounding environment.
Especially corrosion resistance in humid environments, seawater and chemicals.
Mechanical properties:
Tensile strength and toughness: Stainless steel bars have high tensile strength and good toughness, making them suitable for applications that require high strength and durability.
Machinability: Easy to machine, cut, weld and shape, similar to other types of steel.
Heat resistance and stability:
Stainless steel rebar has good heat resistance, especially alloy stainless steels (such as 316, 317) can withstand higher temperatures and corrosion resistance in high temperature environments.
In general, each type of rebar has its own properties and is selected based on the specific requirements of each application. Choosing the right type of rebar will ensure safety and efficiency in construction and products.

3. Applications of steel bars
Rebar has many different applications in the industrial and construction fields thanks to its versatility and mechanical properties. Here are some common applications of steel bars:
Construction: Steel bars are widely used in the construction of structures such as high-rise buildings, bridges, factories, warehouses, industrial structures and infrastructure systems. Steel bars such as beams, columns, partitions and other parts of the structure play an important role in bearing the force and keeping the structure stable.
Manufacture of machinery and equipment: Steel bars are used in the production of industrial machinery and equipment, such as load-bearing parts, shafts, bearings, crankshafts and other machinery components. Hot-rolled and cold-rolled steel bars are commonly used for these applications.
Automotive Industry: In the automotive industry, rebar is used for manufacturing parts, chassis, interior and exterior parts due to its good strength and mechanical properties.

Shipbuilding Industry: In shipbuilding and repair, stainless steel rebar is often used to prevent corrosion in harsh marine environments.

Food Industry: Stainless steel rebar is widely used in equipment and systems related to food production, processing and preservation due to its food safety and corrosion resistance.

Chemical and pharmaceutical industry: Stainless steel rebar is also used in the production of equipment and systems in the chemical and pharmaceutical industry where hygiene and corrosion resistance are essential requirements.

Home Applications: Stainless steel rebar is used in the production of household appliances such as stoves, washing machines, sinks, bathtubs, water pipes and other interior products due to its corrosion resistance and aesthetics.

4. Summary
Through the above sharing, we see that steel bars are an important and diverse structural material with many applications in different industries, from construction, manufacturing, to household and food applications. This reflects its flexibility and superior mechanical properties in many different environments and conditions.
After more than 28 years, Trung Dung Steel is proud to be a Premium distributor of major steel manufacturing brands such as: Southern Steel, Pomina Steel, Hoa Phat Steel, VAS Steel, Tung Ho Steel, …
We are committed to always accompanying and building strong trust for customers with the “Prestige – Dedication – Professionalism” of a premium distributor to bring the best quality steel products quickly to customers.