25–180mm Hot Rolled Flat Bar Q195 Q215 Q235 Mild Steel Flat Bar

1．Product Overview

Hot rolled flat bar is a widely used mild steel product for structural fabrication, machinery manufacturing, construction support, and industrial processing applications. Manufactured according to GB 704 and international ASTM, DIN, EN, and JIS standards, the product offers stable mechanical properties, reliable dimensional consistency, and good fabrication performance.

The flat rectangular section provides convenient welding, cutting, drilling, and assembly for general industrial and structural engineering applications.

2．Technical Solution

The product is produced through hot rolling processes to ensure stable width and thickness tolerances while maintaining good ductility and structural performance.

Low carbon steel grades such as Q195, Q215, Q235, and ASTM A36 provide balanced strength and forming capability for fabrication, welding, and machining operations.

3．Specifications

4．Application

Hot rolled flat bars are commonly used for:

• Steel structure fabrication
• Mechanical manufacturing
• Construction engineering
• Shipbuilding
• Bridge construction
• Automobile chassis production
• Equipment supports
• Industrial brackets and frames
• General fabrication projects

5．Processing

The product supports:

• Cutting
• Drilling
• Punching
• Welding
• Galvanizing
• Painting
• Custom length processing
• Surface finishing

6．Advantages

• Stable hot rolled dimensional accuracy
• Good weldability and fabrication performance
• Wide grade selection for structural applications
• Suitable for galvanizing and painting
• Convenient for machining and assembly
• Applicable to industrial and construction projects

7．How to Choose

• Q195 and Q215 are suitable for light structural and fabrication applications requiring good ductility.
• Q235 and ASTM A36 are commonly selected for general construction and structural engineering applications.
• Q345 is preferred for higher load-bearing structural requirements.
• The width and thickness should be selected according to fabrication design and structural load requirements.

8．FAQ

Q1．What grades are available for hot rolled flat bar
Available grades include Q195, Q215, Q235, Q345, SS400, ASTM A36, and S275JR.

Q2．What is the standard length
Standard length is 6m, and customized lengths are available.

Q3．Can galvanized flat bar be supplied
Yes. Galvanized, painted, oiled, and sand blasted surfaces are available.

Q4．What industries use steel flat bar
Applications include construction, machinery manufacturing, shipbuilding, bridge engineering, and steel structure fabrication.

Q5．What is the MOQ
Minimum order quantity is 50 MT per size.