A500 Carbon Steel Pipe for Structural and Construction Applications

For most steel structure projects, buyers demand load-bearing structural tubing that is weldable and cost-efficient for fabrication, rather than ordinary general pipes.

This is one reason ASTM A500 pipe has become a common choice for workshops, warehouses, equipment platforms, solar mounting structures, and commercial buildings.

From our experience, most inquiries are not for round pipes. Square and rectangular hollow sections account for a large portion of A500 orders because they are easier to connect, fabricate, and install on site.

Product Specifications

Item

Details

Standard

ASTM A500

Grades

Grade A, Grade B, Grade C

Product Forms

Round Pipe, Square Tube, Rectangular Tube

Manufacturing Process

ERW

Outer Diameter

21.3 mm – 660 mm

Square Size

20×20 mm – 500×500 mm

Rectangular Size

30×20 mm – 600×400 mm

Wall Thickness

1.5 mm – 25 mm

Length

3 m – 12 m

Surface

Black, Oiled, Painted

Payment Terms

T/T, L/C

Mechanical Properties & Chemical Composition

Property	Grade B	Grade C
Yield Strength	≥ 315 MPa	≥ 345 MPa
Tensile Strength	≥ 400 MPa	≥ 427 MPa
Carbon (Max)	0.30%	0.27%
Manganese (Max)	1.40%	1.40%
Phosphorus (Max)	0.045%	0.045%
Sulfur (Max)	0.045%	0.045%

Key Features Buyers Focus On

Better Load Capacity Than Ordinary Carbon Steel Tubing

One reason engineers choose ASTM A500 is its higher yield strength. Grade B provides a minimum yield strength of 315 MPa, while Grade C reaches 345 MPa. This allows designers to achieve the required structural performance without increasing section size unnecessarily.

Square and Rectangular Sections Help Reduce Fabrication Costs

In many steel structure projects, square and rectangular tubes are easier to connect than traditional profiles. Fewer connection plates and simpler welding work can help reduce fabrication time and installation costs.

Suitable for Outdoor Structural Applications

A500 pipes and tubes can be supplied with painted, galvanized, or other protective finishes, making them suitable for warehouses, solar structures, agricultural buildings, and infrastructure projects exposed to weather conditions.

Good Balance Between Strength and Material Cost

Many buyers select ASTM A500 because it offers higher structural performance than ordinary mild steel tubing while remaining more economical than many alloy steel alternatives. This balance is especially important for large-scale construction projects where material consumption is significant.

Typical Applications

Our A500 high-strength carbon steel pipe delivers stable load-bearing capacity for construction, energy, transportation and mechanical projects. It can be cut, welded or galvanized easily, fitting both permanent and prefabricated builds. Common application areas are as follows: