ASTM A500 Gr B rectangular tube

ASTM A500 Gr B rectangular tube

The ASTM A500 Gr B rectangular tube is a cold-formed welded carbon steel tube designed with a rectangular cross section. Rectangular tubes are made of carbon steel, a material known for its high strength, ductility, and machinability. It is widely used in building structures, machinery manufacturing, Bridges and other fields.

Criteria and classification
ASTM A500: Standard for cold-formed carbon steel tubing for structural use.
Grade B: The second grade of ASTM A500, with good strength and toughness, suitable for high-load structural applications

Shape: In addition to rectangular tubes, the ASTM A500 standard also covers steel tubes with square and round sections.

Chemical composition
· Carbon (C) : ≤ 0.26%
· Manganese (Mn) : ≤ 1.35%
· Phosphorus (P) : ≤ 0.035%
· Sulfur (S) : ≤ 0.035%

· Copper (Cu) : ≥ 0.20% (optionally added to increase corrosion resistance)

Mechanical property
Yield strength 46ksi, tensile strength 58ksi, elongation 23%.
Production technology
Cold forming process: the hot rolled steel plate is formed by cold bending or cold rolling and rolled into a rectangular shape. Compared with the hot process, the cold forming can make the surface of the pipe smooth and accurate size.
Welding molding: The cold-formed rectangular steel plate is welded at the joint at high frequency to ensure smooth and seamless interface.

Post-treatment: Welded tubing may be straightened, cut, and surfacing to achieve specified dimensions and surface requirements.

Application scenario
Building and structure: Used for supporting parts in building structures, such as beams, columns, frames, etc.
Mechanical manufacturing: suitable for manufacturing handrails, mechanical supports, tool holders and structural parts.
Bridges and infrastructure: Structural supports that can be used to build Bridges and bridge structures and other infrastructure.
Vehicle and ship building: Used to make frames and related parts of hulls.

Merits and demerits
Advantages: High strength, suitable for structural and load-bearing applications. It has good processability, can be welded, cut, drilling and cold bending, suitable for the manufacture of complex structures.
Disadvantages: poor corrosion resistance, not suitable for working in a humid or corrosive environment. Because it is cold formed, the ductility of the material is relatively low.

In summary:
The ASTM A500 Gr B rectangular tube is an economical, versatile structural material that, thanks to its high strength and good workability, is suitable for a variety of industrial and construction applications.