Steel Bar
Why choose us?
After more than ten years of development, we have won a good reputation among customers in Europe, Africa, Latin America, Southeast Asia, the Middle East and other regions. We maintain cooperation with many domestic and foreign agents and distributors and look forward to your joining!
Strong Production Capacity
Tangshan Xunzhuo International Trade Co., Ltd. is a steel group company integrating the steel industry and international trade. We have 7 production lines, more than 500 employees, and a monthly production capacity of 100,000 tons, completing orders for customers efficiently and timely.
Complete Range of Products
The company's main products include galvanized steel coils, galvalume steel coils, color-coated steel coils, corrugated steel roof panels, cold-rolled hard steel, aluminum color-coated coils, tinplate, TFS and other plates as well as angle steel, channel steel, H-shaped steel, Wire rod, rebar/rebar, steel pipe, steel strip, etc.
Strict Quality Inspection
Professional technical quality inspection personnel conduct quality inspections on the products ordered by customers. From production, packaging to transportation, they carefully conduct quality tracking throughout the entire process to ensure that customers receive satisfactory products.
Professional Service
We have a professional service team and a complete sales process. All personnel in each position of the company have more than many years of foreign work experience. The overall team has professional knowledge, contract performance capabilities and risk resistance capabilities to provide customers with professional and high-quality services.
Steel bars, also known as reinforcement steel or rebar, are essential materials used in construction to provide added strength and durability to concrete structures. They are made from carbon steel and come in various sizes, shapes, and grades. In reinforced concrete structures, steel bars are used to resist tensile forces, which concrete cannot withstand on its own. The steel bars are placed in a grid pattern throughout the concrete structure, providing added support and resistance to bending, cracking, and breaking.
Types of Steel Bars
Hot Rolled Deformed Bars
The most common type of reinforcement for regular structures, these steel bars are created through hot rolling - giving it deformations on the surface. These ribs that form make it easier for concrete to bond with it.
Mild Steel Plain Bars
These steel bars do not have any ribs on them. They are mostly used in small projects where minimizing budget is a priority. Since they don’t have any ribs, they do not bind very well with concrete so hooks are usually provided at the ends.
Cold Worked Steel Reinforcement
When hot rolled steel bars undergo the process of cold-working, this type of steel bar is produced. This process involves twisting or drawing the bars at room temperature. It is used in projects that have an emphasis on fixing low tolerance and straightness.
Pre-stressing Steel
This is used in the form of bars or tendons that are made up of a number of strands. Typically, seven-wire strands consist of six wires spun around the seventh wire that is usually larger than the others - forming a helical strand. The high tensile strength of the wires makes it possible to effectively pre-stress concrete even after undergoing short-term or long-term losses.
Shapes of Steel Bars
When it comes to steel bar shapes, there are three primary shapes that mirror tubing, and three additional shapes or variations that are unique to bars. They are:
Round Bars - These products are simple, circular rods that are incredibly common across many industries.
Square Bars - As the name suggests, these have a square cross-section and are also one of the most frequently-used steel shapes.
Flat Bars - Typically less than an inch thick, these are rectangular, flat products with two different measured dimensions in addition to length.
Hexagonal Bars - The first of the less common shapes, hexagonal bars are reminiscent of a pencil with their six sides.
Twisted Bars - Used primarily for aesthetic purposes, these are square (or sometimes flat) bars that have been twisted to create a rope-like appearance with diagonal ridges.
Rebar - The final type is actually rebar (short for reinforcing bar, also known as deformed bar), which is a round bar variation that usually has knurls running around its circumference.
Advantages of Steel Rebar
Provides Support to Structures: The most obvious benefit of steel rebar is that it provides exceptional support to a wide range of structures. A single steel rebar will be linked with multiple rebars to form a framework that will provide stability. The steel rebar’s unique design is what makes it suitable for reinforcing the qualities of concrete. The patterned and textured finish of the rebar is designed to strongly adhere to the concrete’s composition.
High Ductility: Ductility is simply a term that is frequently associated with structural materials. It is defined as a material’s ability to withstand breakage even after deformations to its appearance. Because of its low ductility, bare concrete will not be sufficient to support a structure. Due to the material’s brittleness, it is prone to cracking and damage, especially when exposed to other environmental conditions.
Impact Resistance: It is critical that a building be able to protect itself from any impact damages that can affect not only its appearance but also its functionality. Steel rebar, when combined with other durable construction materials, is critical in allowing a building to generate high impact resistance.
Easy Assembly: The rebars can be easily transferred and installed in a single location using readily available materials. However, tying is the safer and more popular of the two methods because it uses relatively simple materials that can be found on any construction site. This is because tying rebars together can be done in much less time and with much less difficulty.
Recyclable: Steel rebars are a cost-effective option not only because they are widely available, but also because they can be recycled multiple times without losing their properties. Consider all of the structures that have already been demolished. Many of the materials used in their construction, particularly the rebar, are still recyclable.
Reinforced Concrete Structures
One of the primary uses of steel bars in construction is in reinforced concrete structures. The combination of concrete and steel bars provides excellent tensile strength and durability. This makes it perfect for constructing buildings, bridges, and other load-bearing structures.
Earthquake-Resistant Buildings
Steel bars are highly ductile, allowing them to withstand seismic forces better than traditional steel bars. This makes them an ideal choice for constructing earthquake-resistant buildings, ensuring the safety of occupants and reducing the risk of structural damage during seismic events.
High-Rise Buildings
The strength and flexibility of steel bars make them suitable for use in high-rise buildings. On the one hand, they provide the necessary support to bear the weight of the building. On the other, they accommodate the natural movement of the structure due to wind and other external forces.
Bridges and Flyovers
Steel bar's outstanding excellent load-bearing capacity and resistance to environmental factors such as corrosion, make them an ideal choice for bridges and flyovers. Their ductility ensures that the structure can withstand dynamic loads, such as those caused by moving vehicles.
Industrial and Commercial Structures
Steel bars are an excellent choice for constructing industrial and commercial structures, such as factories, warehouses, and shopping malls. Their high strength and durability ensure that these structures can withstand heavy loads and provide a safe environment for workers and customers.
Foundation and Footings
The foundation and footings of a building are crucial for its stability, and steel bars play an essential role in providing the necessary strength and support. The use of steel bars in the foundation ensures that the structure can withstand the pressure exerted by the weight of the building and any additional loads.
Slabs and Beams
Steel bars are used in the construction of slabs and beams, which are essential components of a building’s framework. Their high tensile strength and ductility ensure that these structural elements can bear the load of the building and distribute it evenly across the structure.
Columns and Pillars
Columns and pillars are critical for supporting the weight of a building and maintaining its structural integrity. Steel bars are often used in the construction of these elements due to their excellent load-bearing capacity and resistance to buckling under pressure.
Retaining Walls and Embankments
Retaining walls and embankments are vital for controlling soil erosion and managing water flow in construction sites. Steel bars provide the necessary reinforcement to these structures, ensuring their stability and durability over time.
Marine and Coastal Structures
Steel bars offer excellent corrosion resistance, making them ideal for use in marine and coastal structures such as ports, jetties, and sea walls. These structures are exposed to harsh environmental conditions, and the use of steel bars ensures their longevity and resilience against corrosion and other forms of degradation.
The size of steel bars used for construction work depends on the specific application and requirements of the project.
The most common sizes of steel bars used in construction are:
- 6mm diameter steel bar
- 8mm diameter steel bar
- 10mm diameter steel bar
- 12mm diameter steel bar
- 16mm diameter steel bar
- 20mm diameter steel bar
- 25mm diameter steel bar
These sizes are commonly used in reinforced concrete structures such as beams, columns, slabs, and foundations. The size and spacing of steel bars are specified in the structural drawings, and design calculations are based on the loads and stress the structure is expected to bear. It is important to note that these sizes are based on the metric measurement system. Steel bars may be referred to by their diameter in inches rather than millimeters in countries that use the imperial system.
#1 Grade - Fe 500D
This grade for TMT bar Fe 500D is manufactured with a unique process to increase its flexibility during construction. This TMT bar is mainly known for its bendability which helps the builder to build the structure with imaginative designs possible. Without losing the quality, the bars are designed to withstand high pressure by twisting the rods thus, being used in huge structures.
#2 Grade - Fe 600
TMT bar Fe 600 is the strongest and more rigid among all other steel bars present. TMT bar becomes more strengthened when it comes into contact with cement and other materials. Thus, this is used widely in RCC constructions which require quality and reliable materials. TMT Fe 600 is mainly known for its tensile strength before everything else. This TMT bar is commonly used and cost-efficient compared to other common steel bars.
#3 Grade - Fe 415
TMT bar Fe 415 is one of the early TMT bars that came into existence and is very well known for its strength for a long period of time. These bars are manufactured to support high pressure by using cold twisted procedures during manufacturing called Thermax. It is also known for its malleability, quality, and bendability. These types of bars are mainly used in RCC developments which are prone to seismic tremors.
#4 Grade - Fe 500
TMT bar Fe 500 is one of the strongest TMT bars the construction industry has ever known. It is mainly used in constructing bridges, tunnels, towers, multiple-story buildings, etc. They are one of the highly used TMT bars around the globe. They are well known for their strength and corrosion-resistant properties. These types of bars are used widely these days for house constructions that do not produce immense stress on the bars. The unique design of ribs around the bars equally divides the stress between the bars and the concrete.
Steps of TMT Steel Bar Manufacturing Process
STEP 1: Processing of Raw Iron Ore for Steel Making
The starting point or the raw material that goes into steel manufacturing is primarily iron ore. First of all, the iron ore is processed, mixed, and unmixed as per the requirements of TMT steel. Coal and dolomite also go into the process. During the first stage of the process, the iron ore goes through beneficiation which leads to a rise in the iron substance. Here, the metal fines are gathered together which leads to an improvement in the efficiency of the substance.
STEP 2: Conversion of Iron to Steel
During this step, oxygen is combined with carbon in the iron ore, with the help of an oxygen furnace. This pre-treatment eliminated carbon dioxide from the mixture. After this, the under-process steel is passed through EAF (Electric Arc Furnace) for the purpose of further refining its composition. Now begins the very important step of casting in the form of TMT steel rods in a steel factory. Molten steel from EAF (Electric Arc Furnace) is gradually transferred to the continuous casting machine, from where it flows further into the water-cooled molds. Solidification happens at this step as the steel now takes the shape of TMT bars.
STEP 3: Thermo Mechanical Treatment
The third and final step in TMT steel bar manufacturing, which is Thermo Mechanical Treatment, itself, comprises three sub-steps. These three essential steps are:
- Quenching
- Self Tempering
- Atmospheric cooling
After the completion of the quenching process in the Thermex system, the steel bars are allowed to “self-temper” themselves. What this means is that now the heat from the relatively warmer inner core of the bars flows towards the outer rim, causing automatic tempering of the outer Martensite layer. The structure thus formed on the outer surface of the bars is known as “Tempered Martensite”.
The third and final sub-step in the Thermo Mechanical Treatment of steel bars in the TMT steel factory is known as Atmospheric Cooling. Post self tempering, the almost ready TMT steel bars are put on a cooling bed, which is at the normal atmospheric temperature. During this step of atmospheric cooling, the austenitic core of the bars turns into a ferrite-pearlite structure.
Factors of Choosing the Best Steel Bar for Construction
Chemical Composition
The chemical composition of elements such as carbon, sulphur, and phosphorous dictates the strength, level of flexibility, and bendability of the TMT bars. Therefore, it is always important to check the chemical composition of the TMT bars before purchasing.
Grade of Steel
The grade of steel used in the manufacturing process has a direct impact on the strength of the TMT bars and eventually the strength and longevity of the structure built using the said TMT bars. TMT bars come in various grades, ranging from Fe 450 to Fe 550 D. The higher the grade of steel, the higher the strength.
Tensile Strength & Ductility
Highly ductile steel rods are ideal for all types of construction projects. They are easy to bend and possess increased shock-withstanding capacity. This ensures protection against natural calamities such as earthquakes.
Resistance
Steel rods that are resistant to corrosion are highly ideal for coastal regions. Similarly, TMT bars that guarantee fire and earthquake resistance are preferred as they play a vital role in safeguarding the structure in times of calamities. In short, the best TMT rods are resistant to corrosion, fire, and earthquakes.
Certification
The best steel rods for construction are those that have been certified by recognized national and international organizations such as BIS and SCG. The certifications assure top-notch quality alongside safety against corrosion, earthquakes, and fire.
Brand Reputation
Another aspect to be considered while purchasing TMT bars is the brand image and reputation. Brands with greater quality are highly preferred by architects and civil engineers. This ensures greater reach and visibility.
How Can Rust be Prevented on Steel TMT Bars ?
Galvanizing
This is a method where a coating of zinc metal is applied on steel as a protective coating to prevent rusting and damage.
Painting/Polishing
Paints create a protective layer over metal objects and prevent moisture from reaching them. Although it is not a sure way to avoid metal from contacting moisture, it can certainly slow down rust.
Rust-Proofing Sprays
It is a corrosion resistant oil polish spray that you can apply on steel materials as a protective layer against rust.
Electrochemical Treatment
In this method, electrical charge is passed which prevents rusting by suppressing electrochemical reactions.
Hot Dipping
In this method, the steel bar is dipped inside the jar of hot molten zinc, to obtain a thin coating of the galvanizing metal.
Thermo Mechanical Treatment
This method to manufacture steel rods is used widely to prevent rusting from steel metals.
Storage Tips for TMT Steel Bars
Elevate from Ground Level
The bars should be kept at least 150-200 mm above the ground level to prevent any direct contact with the soil or water. Use wooden planks or bricks to create a raised platform for storage.
Proper Covering
TMT bars should be adequately covered to protect them from rain, sun, and other adverse weather conditions. A waterproof cover is ideal for this purpose.
Avoid Bending
To maintain the structural integrity of the bars, avoid bending or twisting them during storage. They should be stored in a straight position.
Organize by Size and Type
For easy identification and usage, bars of the same size and type should be stored together.
Handling Tips for TMT Steel Bars
Use Appropriate Gear
Always use gloves and safety shoes while handling these bars to prevent any injuries.
Proper Lifting Techniques
Avoid lifting too many bars at once. Use appropriate machinery if the weight exceeds safe manual handling limits.
Avoid Dropping
Dropping the bars from a height can cause deformations. Lower them gently to the ground or onto the storage platform.
Regular Inspection
Regularly inspect the bars for any signs of rust or damage. Replace any compromised bars immediately to maintain the overall quality of your construction.
Frequently Asked Questions
We're professional steel bar manufacturers and suppliers in China, specialized in providing high quality customized service. We warmly welcome you to wholesale high-grade steel bar in stock here from our factory. Contact us for quotation.
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