Description
What is A500 Rectangular Tubing?
A500 rectangular tubing is a widely used structural steel component, known for its strength, durability, and versatility. This tubing is manufactured according to ASTM A500 specifications, ensuring high-quality and reliable performance for structural applications. Whether used in construction, infrastructure, manufacturing, or engineering, A500 rectangular tubing provides a cost-effective solution with excellent mechanical properties.
ASTM A500 Rectangular Tube Dimensions
Size (mm) kg/m Size (mm) kg/m
40 x 20 x 2.0 1.68 40 x 20 x 2.5 2.03
40 x 20 x 3.0 2.36 40 x 25 x 1.5 1.44
40 x 25 x 2.0 1.89 40 x 25 x 2.5 2.23
50 x 25 x 2.0 2.21 50 x 25 x 2.5 2.72
50 x 25 x 3.0 3.22 50 x 30 x 2.5 2.92
50 x 30 x 3.0 3.45 50 x 30 x 4.0 4.46
50 x 40 x 3.0 3.77 60 x 40 x 2.0 2.93
60 x 40 x 2.5 3.71 60 x 40 x 3.0 4.39
60 x 40 x 4.0 5.72 70 x 50 x 2 3.56
70 x 50 x 2.5 4.39 70 x 50 x 3.0 5.19
70 x 50 x 4.0 6.71 80 x 40 x 2.5 4.26
80 x 40 x 3.0 5.34 80 x 40 x 4.0 6.97
80 x 40 x 5.0 8.54 80 x 50 x 3.0 5.66
80 x 50 x 4.0 7.34 90 x 50 x 3.0 6.28
90 x 50 x 3.6 7.46 90 x 50 x 5.0 10.11
100 x 50 x 2.5 5.63 100 x 50 x 3.0 6.75
100 x 50 x 4.0 8.86 100 x 50 x 5.0 10.90
100 x 60 x 3.0 7.22 100 x 60 x 3.6 8.59
100 x 60 x 5.0 11.70 120 x 80 x 2.5 7.65
120 x 80 x 3.0 9.03 120 x 80 x 4.0 12.00
120 x 80 x 5.0 14.80 120 x 80 x 6.0 17.60
120 x 80 x 8.0 22.9 150 x 100 x 5.0 18.70
150 x 100 x 6.0 22.30 150 x 100 x 8.0 29.10
150 x 100 x 10.0 35.70 160 x 80 x 5.0 18.00
160 x 80 x 6.0 21.30 160 x 80 x 8.0 27.90
200 x 100 x 5.0 22.70 200 x 100 x 6.0 27.00
200 x 100 x 8.0 35.4 200 x 100 x 10.0 43.60
250 x 150 x 5.0 30.5 250 x 150 x 6.0 38.2
250 x 150 x 8.0 48.0 250 x 150 x 10 59.3
300 x 200 x 6.0 48.10 300 x 200 x 8.0 60.50
300 x 200 x 10.0 75.00 400 x 200 x 8.0 73.10
400 x 200 x 10.0 90.70 400 x 200 x 16 142.00
ASTM A500 Grade A, B, C, D Chemical Composition
| Element | Grade A (%) | Grade B (%) | Grade C (%) | Grade D (%) |
| Carbon (C) | 0.26 max | 0.26 max | 0.23 max | 0.23 max |
| Manganese (Mn) | 1.35 max | 1.35 max | 1.35 max | 1.35 max |
| Phosphorus (P) | 0.035 max | 0.035 max | 0.035 max | 0.035 max |
| Sulfur (S) | 0.035 max | 0.035 max | 0.035 max | 0.035 max |
ASTM A500 Grade A, B, C, D Mechanical Properties
| Property | Grade A | Grade B | Grade C | Grade D |
| Yield Strength (min) | 228 MPa (33 ksi) | 290 MPa (42 ksi) | 317 MPa (46 ksi) | 345 MPa (50 ksi) |
| Tensile Strength (min) | 400 MPa (58 ksi) | 400 MPa (58 ksi) | 427 MPa (62 ksi) | 448 MPa (65 ksi) |
| Elongation (%) | 25 | 23 | 21 | 20 |
Grades of A500 Rectangular Tubing
A500 rectangular tubing is available in different grades, each with unique mechanical properties and applications:
- Grade A: Minimum yield strength of 39,000 psi and tensile strength of 45,000 psi.
- Grade B: Minimum yield strength of 46,000 psi and tensile strength of 58,000 psi.
- Grade C: Minimum yield strength of 50,000 psi and tensile strength of 62,000 psi.
- Grade D: Minimum yield strength of 50,000 psi and tensile strength of 58,000 psi (only available in certain conditions).
Each grade provides varying levels of strength, making it crucial to select the right grade based on application requirements.
Manufacturing Process of A500 Rectangular Tubing
A500 rectangular tubing is manufactured using cold-forming techniques. The process involves several key steps:
- Raw Material Selection: High-quality carbon steel coils are chosen for manufacturing.
- Cold Forming: The steel is cold-formed into a rectangular shape without applying heat, which helps in achieving tight dimensional tolerances.
- Electric Resistance Welding (ERW): The edges of the tubing are joined using ERW to create a continuous, strong seam.
- Cutting and Sizing: The tubing is cut to the required lengths and undergoes sizing to meet exact specifications.
- Quality Testing: The final product is subjected to rigorous mechanical and chemical tests to ensure compliance with ASTM A500 standards.
Comparison: A500 vs. Other Structural Tubing Standards
A500 rectangular tubing is often compared with other structural steel standards, such as A513, A36, and A1085. Here’s how it stands out:
- A500 vs. A513: A500 is a structural-grade tubing, while A513 is used for mechanical applications with tighter tolerances.
- A500 vs. A36: A36 is a hot-rolled steel used for plates and beams, whereas A500 offers a lighter and more efficient solution for structural tubing.
- A500 vs. A1085: A1085 is an improved version of A500, offering tighter tolerances and enhanced structural performance.
Choosing the Right A500 Rectangular Tubing
When selecting A500 rectangular tubing, consider the following factors:
- Grade Selection: Choose the appropriate grade based on strength and load-bearing requirements.
- Wall Thickness: Determine the thickness required to meet design specifications.
- Size and Dimensions: Ensure the tubing meets the structural needs of the application.
- Coating and Finishing: Galvanized or painted finishes enhance durability and longevity.
Fabrication and Welding Considerations
A500 rectangular tubing is highly weldable and can be fabricated using common metalworking techniques. Considerations include:
- Welding Techniques: MIG, TIG, and stick welding are commonly used.
- Cutting Methods: Plasma cutting, laser cutting, and sawing can be employed.
- Bending and Forming: Cold bending is possible, but proper support is necessary to prevent deformation.
Maintenance and Longevity of A500 Rectangular Tubing
To extend the lifespan of A500 rectangular tubing:
- Apply Protective Coatings: Galvanizing or painting prevents rust and corrosion.
- Regular Inspection: Check for signs of wear, damage, or corrosion in structural applications.
- Proper Storage: Store tubing in a dry, covered area to prevent exposure to moisture.
Application
1. Construction and Infrastructure
- Structural frameworks for buildings, bridges, and towers
- Support columns and load-bearing structures
- Industrial mezzanines and storage racks
2. Manufacturing and Engineering
- Machine frames and equipment supports
- Conveyor systems and material handling structures
- Automotive and transportation components
3. Agricultural and Industrial Uses
- Fencing and enclosures
- Greenhouse structures and support frames
- Scaffolding and safety railings
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