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SS400 Carbon Steel Flat bar

Flat Steel, also known as flat bar or steel plate, is a versatile steel product characterized by its rectangular cross-section. It is widely used in construction, shipbuilding, automotive manufacturing, and various machinery applications due to its excellent strength, durability, and ease of welding and fabrication. Available in various thicknesses, widths, and lengths, Flat Steel meets diverse industrial needs efficiently.

Flat Bar Steel 

Flat bar steel, also known as carbon steel flat bars, is a versatile and widely used material in the steel industry. It is produced in a variety of thicknesses, widths, and lengths to meet the requirements of different applications. With its flat surface and uniform thickness, flat bar steel is used in construction, manufacturing, automotive, and machinery applications, offering strength, durability, and ease of use. It is available in both hot-rolled and cold-rolled forms, each offering unique properties for specific applications.

Key Features of Flat Bar Steel

  • Strong and Durable: Flat bar steel offers high tensile strength, making it suitable for heavy-duty applications where strength and load-bearing capacity are required.
  • Easy to Fabricate: Flat bars are easy to cut, weld, and drill, making them ideal for a wide range of applications that require customization and precise fabrication.
  • Versatile: Flat bar steel can be used in a variety of industries, including construction, manufacturing, and transportation, providing flexibility and adaptability for many projects.
  • Uniform Dimensions: With precise thickness and width tolerances, flat bar steel offers uniformity that is critical for high-quality end products and applications.
  • Corrosion Resistance: Depending on the application and treatment, carbon steel flat bars can be galvanized or coated for added corrosion resistance, ensuring longevity in outdoor and industrial environments.

Technical Specifications of Flat Bar Steel

ItemParameter
MaterialCarbon Steel (Q235, Q345, etc.)
Thickness3 mm - 100 mm or Custom
Width10 mm - 300 mm or Custom
Length1000 mm - 12000 mm or Custom
Tensile Strength≥ 400 MPa
Yield Strength≥ 250 MPa
Elongation≥ 20%
HardnessHB 120 - 160
Surface FinishMill finish, Galvanized, or Custom
Corrosion ResistanceCan be treated (e.g., galvanized) for enhanced resistance
Grade OptionsQ235, Q345, A36, or Custom grades

Advantages of Flat Bar Steel

  • High Strength and Durability: Carbon steel flat bars are known for their excellent strength and resistance to mechanical stress, making them suitable for heavy-duty structural applications.
  • Customization: These bars come in a range of thicknesses, widths, and lengths, offering flexibility in design and construction. Custom dimensions are available based on specific project requirements.
  • Cost-Effective: Compared to other steel profiles, flat bar steel provides an economical solution for a wide range of applications, especially when large quantities are required.
  • Ease of Fabrication: Flat bars are easy to machine, cut, and weld, allowing for fast production and adaptability in various manufacturing processes.
  • Good Corrosion Resistance: When treated with coatings such as galvanization, flat bar steel can provide reliable corrosion resistance, making it ideal for both indoor and outdoor applications.

Common Applications of Flat Bar Steel

  • Construction Industry: Used in structural components such as beams, supports, and framing elements, providing strength and stability to buildings and infrastructure.
  • Manufacturing and Machinery: Flat bars are often used in the production of machinery parts, conveyor systems, and equipment frames.
  • Automotive Industry: Used for automotive structural components, brackets, and reinforcements, providing strength and reliability for vehicle manufacturing.
  • Transportation: In the construction of trailers, vehicle parts, and structural supports for transportation vehicles.
  • Fabrication: Flat bars are frequently used in the fabrication of various products and parts, such as brackets, frames, and structural supports for different industries.

Frequently Asked Questions (FAQ)

1. What is the difference between flat bar steel and other types of steel bars?
Flat bar steel has a flat, rectangular shape with uniform thickness and width, making it different from round bars, square bars, or angle bars. It offers high strength and is versatile for a range of applications, including construction, automotive, and manufacturing.

2. Can flat bar steel be used in outdoor applications?
Yes, flat bar steel can be used in outdoor applications, especially if it is treated with protective coatings like galvanization to enhance corrosion resistance.

3. What grades of carbon steel are available for flat bars?
Common grades for flat bar steel include Q235, Q345, A36, and others. Each grade offers different mechanical properties such as tensile strength, yield strength, and elongation, and can be selected based on the specific needs of the application.

4. Are custom sizes available for flat bar steel?
Yes, custom thicknesses, widths, and lengths are available based on customer requirements. Flat bars can be tailored to meet specific design and construction needs.

5. How is flat bar steel processed?
Flat bars can be processed through various methods including hot rolling, cold rolling, and cutting. They can also be galvanized or painted for added protection against corrosion.


Flat bar steel is a reliable and versatile material that offers strength, durability, and adaptability for a wide range of applications in construction, manufacturing, automotive, and more. Whether used in structural components, machinery, or fabrication, carbon steel flat bars provide an effective solution for many industries. If you need custom sizes or more information about our flat bar steel products, feel free to contact us.






Q: Are You Manufacture or Trade Company?

A: We are the professional manufacturer of steel products located in China. Welcome to contact us and visit our factory before you place orders.

Q: How do you guarantee the quality?

A: We are the professional manufacturer of steel products located in China. Welcome to contact us and visit our factory before you place orders.

Q: Can I get free samples?

A: Of course you can. We can produce according to your samples or technical drawings. Contact us by whatsapp or email to get free samples and you will get the sample after 3-7 working days.

Q: What is the MOQ? 

A: If you are scheduling to place a small quantity order or trial order, feel free to contact us, we can meet your requirements.

Q: Can you OEM or ODM?

A: Yes, we have a strong developing team. The products can be made according to your request.

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