Steel Reinforcement Bar
Steel reinforcement bar, namely rebar, is commonly used in a wide range of construction projects to strengthen concrete under tension. At Wanzhi Steel, it is available in diameters ranging from 6 mm to 40 mm. And the common length is 6 m, 9 m, and 12 m. It is strong and durable, which is produced to meet the highest industry standards. As one of the leading wholesale rebar suppliers, we are able to offer custom solutions to meet special requirements. Welcome to talk with us!
Steel Reinforcement Bars Sizes
|Length||6 m, 9 m, 12 m or custom length|
|Materials||Carbon steel, stainless steel|
|Types||Plain round bar; deformed bar|
|Meters per tonne||101-2531 m|
|Grades||HRB350, HRB400, HRB500|
|Package||Long in bundles (10 ~ 40 mm) or in coils (6 ~ 16 mm)|
Features of Reinforcing Steel Bar
1. High yield strength and toughness;
2. Great resistance to corrosion and fire;
3. Various sizes, finishes, grades to choose from;
4. Wide application range.
Uses of Steel Reinforcement Bar
Reinforcing steel bar is a kind of building material, which can increase the strength of the structure. Generally, these bars are welded or bound together during use. You can find rebars in all kinds of construction structures, such as bridges, highways, culverts, tunnels, beams, columns, walls, etc. Below let’s review the uses by size.
8 mm /10 mm – This thin mild steel rebar is ideal for projects like swimming pools, driveways, patios, to provide the structure with shape and strength.
15 mm – Slightly thicker. It is perfect for the uses like highways, bridges, columns, roof slabs, or floor slabs.
20 mm – Widely used in foundations, retaining walls, or highways, as well as structure support, like bridges.
25 mm – It is suitable for medium to heavy building structures, such as columns, beams, and retaining walls; when the steel rebar is thicker than 25 mm, an 18 gauge rebar binding wire is required.
30 mm – Thicker and more durable, which is an ideal option as the structural support of medium or heavy construction projects, like warehouses, beams, columns, etc.
35 mm – It is thick and strong, which is well suited for load-bearing structures.
45 mm – This rebar size is designed for large and tall buildings, bridges, and other civil works.
What Is Rebar?
Rebar, short for reinforcing bar, is a hot-rolled round bar with a circular cross-section. It is formed by hot rolling and naturally cooled, which is mainly used for reinforcement in concrete or asphalt pourings. The most common material is carbon steel. While you can also find stainless steel reinforcement bars on the market. According to the surface, it can be divided into plain round steel bar and deformed steel bar. The latter is also known as ribbed steel reinforcing bar, which is with ribs, lugs, or protrusions on the surface to provide better bonding ability with the concrete.
Steel Rebar Production Process
Generally, there are four processes: rust removal; straightening; cutting; and forming.
(1) Clean the adhered oil, soil, and rust, and the rust can be removed through the cold drawing process;
(2) Straighten the steel bars mechanically or manually. The straightened steel bars shall not have local bending, dead bends, or small waves. Besides, the surface scars shall not reduce the cross-section of the steel bars by 5%.
(3) Cut the steel bars on the basis of the number, diameter, length, and quantity of the steel bars. As a rule, cut the long material before cutting the short material to minimize the short ends to save materials.
(4) Calculate the blanking length and size of the steel bar according to the drawings. Also, the end of the stirrup also needs to meet the requirements of the design drawings. Through a series of stands, including cross-hatching, steel rods are shaped into bars.
Weight of Ribbed Steel Reinforcement Bar
The weight calculation formula of deformed rebar is:
Weight (kg)= Diameter (mm) * Diameter (mm) *0.00617* Steel bar length (m)
For example, if the ribbed steel reinforcing bar is 16 mm in diameter and 9 m in length, then the weight is about 14.22 kg (16*16*0.00617*9). If you order 3,000 pieces, the total weight is about 43 tons. Through the formula here, you can roughly know the weight. If you want more details and the latest price, please contact us!
Types of Steel Reinforcement Bars
There are many kinds of steel rebars. According to the diameter, there are steel wires (diameter of 3~5 mm), fine steel bar (diameter of 6~10 mm), and thick steel bar (> 22 mm). While according to the surface, you can find plain round bar and ribbed steel bar (deformed bar). The former one has a plain and smooth surface without ribs. While the latter one is patterned with protrusions to strengthen the bond between the bar and cement. Therefore, it can withstand more external forces. Below let’s review the steel rebars in different materials.
1. Carbon Steel Rebar
Carbon steel is the most common material for making steel rebar. Due to the carbon color, it is also known as “black bar”. Carbon steel has a certain toughness and strength so that it can effectively resist external force without fracture under external force. But it corrodes easily, which will further break the concrete around it. So it is not suitable for situations with high humidity.
2. Galvanized Rebar
Galvanized reinforcing bar is coated with a zinc layer. The zinc coating provides protection to the underlying steel bar from corroding when embedded in concrete. Besides, it also has much better bond strength than the black bar or epoxy-coated reinforcement bar. However, it will be more affordable than stainless steel bars.
3. Stainless Steel Rebar
Among the steel rebars available, the stainless steel reinforcement bar is the most corrosion-resistant and durable one. While it is also the most expensive one. It can prolong the service life of concrete structures under corrosive conditions, such as the areas where de-icing salts are heavily used or marine environments. In addition, it is able to keep strength, toughness, and ductility at very low or very high temperatures.
4. Epoxy-Coated Rebar
Epoxy-coated steel bar is produced by spraying epoxy resin powder on the surface of steel bar by electrostatic spraying. Generally, the coating thickness is 0.15 ~ 0.30 mm. This method can effectively prevent the corrosion of reinforcement and improve the durability of concrete structures. That is to say, it has good corrosion resistance. However, its bond strength with concrete is poor. It is suitable for industrial and civil uses in damp or corrosive environments.
5. Welded Reinforcement Mesh
Steel reinforcement mesh is a mesh made of longitudinal and transverse steel bars crossed by binding or welding at a certain distance and at right angles. The common material is high-quality low carbon steel wire, ribbed steel bar, or round steel bar. It is widely used in bridges, highways, tunnels, subway culverts, power plant projects, dam foundations, river embankment, protection walls, and other concrete structure projects.
Why Use Steel Rebars in Construction?
Reinforcing steel can strengthen the concrete structure. Concrete has strong compression strength, but it is weak in tension. While reinforcing steel has excellent tensile strength. That’s why it is perfect for concrete slabs, walls, columns and beams, foundations, etc. However, corrosion of steel reinforcement bars is the most important factor affecting the durability of concrete structures. Steel bars will expand in volume due to corrosion and rust, which will make the concrete protective layer fall off, and even longitudinal cracks. It will further affect the normal use of the structure. Besides, steel rust will break the bond between steel and concrete to lower its bearing capacity. Therefore, galvanizing or epoxy-coating is effective to prevent further corrosion.
Get Wholesale Reinforcing Bar Price
The FOB price of deformed bars starts from USD 900. It differs with many factors, such as the material, steel grades, finishes, sizes, etc. Wanzhi Steel is a wholesale supplier of steel products in China. Therefore, we will offer you a fair price. If you want the latest price, please contact us online, by email, or call us now!
Wanzhi Steel is a top steel wire and mesh supplier in China, which has its own company in Hebei Province. While as a global steel trading company, we aim to be your one-stop steel solution provider. We have developed a multilingual sales team. Except for our own steel wire and mesh products, we also serve as an agent for famous steel companies, such as Laigang Steel, Baotou steel, Hangang Steel. If you are looking for steel reinforcement bars of different sizes, lengths, and finishes, welcome to contact us! We will help you buy reinforcement bars with the proper size, grade, and material at a fair price.