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. The common length is 6 m, 9 m, and 12 m. It is strong and durable and 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 Reinforcing Bars

Deformed Steel Reinforcing Bar

Steel Reinforcement Bars Specification

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. 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 has ribs, lugs, or protrusions on the surface to provide better bonding ability with the concrete.
• According to the supply form, there are two forms of steel rebar coils and straight steel reinforcement bars.

Steel Reinforcement Bars

Deformed Bar Coils

Weight calculation formula of rebar

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.

Features of Reinforcing Steel Bar

• High strength: HRB500 has a tensile strength of 630MPa, which is more than 100 times that of concrete.
• Ductility: Elongation ≥16% (HRB400), can absorb energy without breaking during earthquakes.
• Hot rolling process: Grain refinement improves strength (grain size ≥8).
• Adhesion: Crescent rib design increases the bonding strength by 40% compared with round steel bars.
• Alloy composition: C content 0.17-0.25%, Mn content 1.20-1.60%.
• Durability: high toughness, good corrosion resistance and fire resistance.
• Various specifications: a variety of sizes, surface treatments, and grades are available.
• Wide application: cold-rolled steel coils can be used for continuous reinforcement (hoops, distribution bars), hot-rolled steel bars (straight bars) main force bars (beam, column longitudinal bars).

Wanzhi Steel Steel Rebar Case

rebars shipped to Saudi Arabia

Uses of Steel Reinforcement Bar

Reinforcing steel bar is a kind of building material that 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.

Uses of different diameters

• 8 mm /10 mm: This thin mild steel rebar is ideal for projects like swimming pools, driveways, and patios, to provide the structure with shape and strength.
• 15 mm: Slightly thicker. It is perfect for use on highways, bridges, columns, roof slabs, or floor slabs.
• 20 mm: Widely used in foundations, retaining walls, or highways, as well as structural 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.

Bridge

Foundation

How To Identify Steel Bars?

The rebar is marked with symbols and numbers to indicate:

• Manufacturer Plant: Identifies the manufacturing plant.
• Rebar Size: Indicates the diameter.
• Grade: Specifies the yield strength (e.g., 60 for Grade 60).
• Type: Identifies the material (e.g., “S” for carbon steel, “W” for low alloy steel or weldable steel such as Grade 60W).
• C: Cold-finished steel (e.g., B500C).

The meaning of each character in HRB500E

• H: Hot Rolled, indicates hot rolling process, which means that the steel bar is formed by high-temperature rolling.
• R: Ribbed, indicates ribbed, with regular ribs on the surface of the steel bar to enhance the bond with concrete.
• B: Bars, is the English abbreviation for steel bar, indicating that the product is steel bar.
• 500: The standard value of yield strength is 500MPa, which belongs to Grade 4 steel bar or high-strength steel bar.
• E: Indicates earthquake resistance. None = ordinary steel bars, E = seismic steel bars (must meet the yield strength ratio ≤ 1.25, maximum force total elongation ≥ 9%)

Hot Rolled Deformed Bars

Concrete Reinforcing Bar

Why Use Steel Rebars in Construction?

Because reinforcing steel can strengthen the concrete structure. Although concrete has strong compression strength, it is weak in tension. While reinforcing steel has excellent tensile strength. That’s why it is perfect for concrete slabs, walls, columns, 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.

Types of Steel Reinforcement Bars

Classification by diameter

• Steel wire rod(diameter of 3~5 mm).
• Fine steel bar (diameter of 6~10 mm).
• Thick steel bar (> 22 mm).

Classification by surface

• Plain round bar: plain and smooth surface without ribs.
• Ribbed steel bar (deformed bar): patterned with protrusions to strengthen the bond between the bar and cement. Therefore, it can withstand more external forces.

Plain Round Bar

Ribbed Steel Bar

Classification by material

1. Carbon Steel Rebar (Black Rebar)

It is the most commonly used material for making rebars. Because of its carbon color, it is also called “black steel bar”. It has a certain toughness and strength, can effectively resist external forces, and will not break under external forces. But it is easy to corrode, and it is not suitable for high-humidity environments.

2. Galvanized Rebar

GI steel bars are coated with a layer of zinc on the surface, which can protect the steel bars from corrosion when embedded in concrete. Its bonding strength is much higher than that of black steel bars or epoxy-coated steel bars. The price is more affordable than stainless steel bars.

3. Stainless Steel Rebar

The most corrosion-resistant and durable steel bar is also the most expensive. It can extend the life of concrete structures under corrosive conditions, such as areas where deicing salts are used extensively or in marine environments. It can maintain strength, toughness and ductility at extremely low or high temperatures.

Epoxy Coated Rebars

Steel Reinforcement Mesh

4. Epoxy-Coated Rebar

Epoxy resin powder is sprayed on its surface by electrostatic spraying, with a coating thickness of 0.15~0.30mm. This process improves the corrosion resistance of steel bars, effectively prevents steel bars from rusting, and improves the durability of concrete structures, but the bond strength with concrete is poor, and it is suitable for industrial and civil buildings in humid 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 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.

6. European steel bars

It is made of manganese, bendable and durable. Which is not suitable for highly corrosive environments.

Rebar Sizes and Grades

Sizes: Rebar comes in a variety of diameters, typically from #3 (3/8 inch) to #18 (2.25 inches). Sizes are indicated by a number corresponding to one-eighth of an inch of its diameter.
Grades: Rebar is graded based on its yield strength in psi or MPa. Common grades include:

• Grade 40: has a yield strength of 40,000 psi.
• Grade 60: has a yield strength of 60,000 psi (most commonly used).
• Grade 75: has a yield strength of 75,000 psi.
• Grade 80: has a yield strength of 80,000 psi.

This article comprehensively talks about Steel Rebar Sizes, Grades & Codes.

Hot Rolled Hrb400 Hrb500 coiled steel rebar

Ribbed Reinforcement Bars

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 based on 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.

Hot Rolled 10/12/16mm alloy Rod coil rebar

Deformed Bars

Get Wholesale Reinforcing Bar Price

The FOB price of deformed bars starts from USD 400. 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.

Reinforcing Bars at Factory

Warehouse

Steel reinforcement bar For Sale

Wanzhi Steel is a top steel wire and mesh supplier in China, which has its own company in Hebei Province. 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, and Hangang Steel.

If you are looking for steel reinforcement bars of different sizes, lengths, and finishes, welcome to contact us!

You can seek help from technicians

online or send us an email.

Wanzhi Steel will help you buy reinforcement bars with the proper size, grade at a fair price.

Leave Us A Message