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8mm Rebar Coil: Features, Advantages, and Applications

29/09/2025

8mm rebar coil is one of the most important and widely used types of construction steel today. With advantages in strength, load-bearing capacity, ductility, and ease of processing, 8mm rebar coil is always a top choice for many construction projects. To better understand its nature, advantages, and applications, read the following article from Sơn Hà SSP!

1. What is 8mm Rebar Coil?

8mm rebar coil (symbol Φ8, also known as D8 rebar coil) is a type of round construction steel coil with a cross-sectional diameter of 8mm. Produced at high temperatures, it possesses excellent heat resistance, load-bearing capacity, and outstanding durability. Structures that use this type of steel can have a lifespan of 15–20 years.

8mm rebar is widely applied in construction projects, especially in reinforced concrete, thanks to its ability to enhance the stiffness and strength of structural frameworks. This product is primarily supplied for construction contractors and large-scale building projects.

What is phi 8 steel coil?

2. Advantages of 8mm Rebar Coil

8mm rebar coil offers many outstanding advantages, most notably:

High strength and load-bearing capacity:
8mm rebar contains chemical components including alloying elements such as manganese, copper, carbon, calcium, and oxygen. These elements form a solid structure that enhances long-term durability and resistance to external environmental impacts, earning great trust from users in today’s construction market.
Excellent heat and corrosion resistance:
The steel-making process at high temperatures improves oxidation resistance and heat resistance, thereby extending the service life of construction works.
Compliance with technical standards:
8mm rebar is manufactured according to Vietnamese Standard TCVN 1651:2018 (TCVN 1651-1:2018) and international standards such as ASTM A615 and JIS, ensuring requirements for yield strength and elongation. The product has a uniform round cross-section with minimal ovality, guaranteeing stable quality.
Easy to process and shape:
With its small diameter and high ductility, 8mm rebar coil can be easily bent, tied, or cut into segments for small structural components without requiring much specialized equipment.

8mm diameter steel coil has high durability, load-bearing capacity, flexibility and is easy to process.

Thanks to these properties, 8mm rebar coil has become a reliable construction steel material, trusted by investors and construction companies alike.

3. Applications of 8mm Rebar Coil

8mm rebar coil is mainly used in construction projects, specifically:

Reinforcing concrete structures: Used for beams, foundations, columns, concrete slabs, tying stirrups, and combining with cement mortar to create load-bearing reinforced concrete structures.
Civil and industrial construction: 8mm rebar is applied in residential houses, high-rise buildings, industrial factories, irrigation works, bridges, roads, and hydropower dams.
Other applications: Beyond reinforced concrete, 8mm rebar coil is also used as supports, auxiliary frames in construction, and even in mechanical processing for small structural components.

Application of steel diameter 8 in construction foundation

4. Frequently Asked Questions About 8mm Rebar Coil

4.1. What types of 8mm rebar coil are there?

8mm rebar coil is mainly classified by surface and application. The main types include:

Plain 8mm rebar coil (smooth):
Smooth and shiny surface, no ribs, easily identified by the naked eye. This type is usually used in structures that do not require high bonding strength.
Ribbed 8mm rebar coil:
The surface has raised ribs, providing better friction with concrete and increasing bonding strength. Ribbed 8mm rebar is widely used in reinforced concrete to prevent slippage and improve load-bearing capacity.
Galvanized 8mm rebar coil:
Coated with a layer of zinc on the outside to enhance corrosion resistance. Galvanized rebar is suitable for coastal projects or humid environments.

4.2. How much does 1 meter of 8mm rebar weigh?

One of the most common questions is how much 1 meter of 8mm rebar weighs. To determine the exact weight, you can use the formula for calculating the mass of steel based on its density:

Formula:
M = (7850 × L × 3.14 × d²) / 4

Where:

M = mass of the steel bar (kg)
L = length of the steel bar (m)
d = nominal diameter of the steel (m)
7850 = density of steel (kg/m³)

1 meter of 8mm diameter steel coil weighs about 0.395 kg

So, 1 meter of 8mm rebar coil weighs about 0.395 kg with an allowable tolerance of ±8%. This weight corresponds to the calculation formula:

M = (7850 × 1m × π × (0.008m)²) / 4 ≈ 0.394 kg.

4.3. How much does one coil of 8mm rebar weigh?

The weight of each 8mm rebar coil depends on the manufacturer and packaging specifications. However, typically one coil (loop) of 8mm rebar weighs around 200 – 310 kg, with each loop measuring about 3m in circumference and weighing approximately 1.18 kg per loop.

How Many Kg Does A Roll Of 8mm Steel Weigh

4.4. How much does 8mm rebar coil cost today?

Currently, there are many brands on the market supplying 8mm rebar, offering contractors and builders a wide range of options. On average, the price of 8mm rebar typically ranges from 10,000 – 12,000 VND/kg.

Note: The price of 8mm rebar coil may vary depending on the time of purchase, order quantity, brand, as well as delivery location. Therefore, for the most accurate and up-to-date quotation, customers should contact reputable distributors or manufacturers directly.

It can be seen that 8mm rebar coil is not only a common construction material but also plays a vital role in ensuring the quality and longevity of structures. With its durability, ease of processing, diverse applications, and reasonable cost, 8mm rebar coil is truly an optimal choice for contractors, businesses, and building material distributors.