ASTM A500 Steel Tube
ASTM A500 Steel Tube
ASTM A500 is the standard specification for cold-formed welded and seamless carbon steel structural tubing in round, square, and rectangular shapes. These tubes are widely used in construction, infrastructure, and structural applications due to their high strength, excellent weldability, and superior durability.
| Property | Details |
| Standard | ASTM A500 |
| Material | Cold-formed, welded, and seamless carbon steel |
| Available Shapes | Round, Square, Rectangular, and Custom Shapes |
| Manufacturing Process | Electric Resistance Welded (ERW) or Seamless |
| Grades | A, B, C, D |
| Wall Thickness | Specified based on application and size |
| Size Range | Varies based on round, square, or rectangular tubing |
| Dimensional Tolerance | As per ASTM A500 specification |
| Coating Options | Bare, Painted, Galvanized, or Custom Coating Available |
| Weldability | Excellent, suitable for fabrication and construction |
| Corrosion Resistance | Can be enhanced with coatings or galvanization |
| Applications | Structural supports, buildings, bridges, towers, infrastructure, machinery frames, and more |
| Advantages | High strength-to-weight ratio, precise dimensions, cost-effective, durable |
Structural Steel Tubing Products
A500 Round Tube
A500 Square Tubes
A500 Rectangular Tubes
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 |
Structural Steel Tubing Dimensions
ASTM A500 Grade A, B, C, D Square Tube Dimensions
| Size (mm) | kg/m | Size (mm) | kg/m |
|---|---|---|---|
| 20 x 20 x 2.0 | 1.12 | 20 x 20 x 2.5 | 1.35 |
| 25 x 25 x 1.5 | 1.06 | 25 x 25 x 2.0 | 1.43 |
| 25 X 25 X 2.5 | 1.74 | 25 X 25 X 3.0 | 2.04 |
| 30 X 30 X 2.0 | 1.68 | 30 X 30 X 2.5 | 2.14 |
| 30 X 30 X 3.0 | 2.51 | 40 x 40 x 1.5 | 1.81 |
| 40 x 40 x 2.0 | 2.31 | 40 x 40 x 2.5 | 2.92 |
| 40 x 40 x 3.0 | 3.45 | 40 x 40 x 4.0 | 4.46 |
| 40 x 40 x 5.0 | 5.4 | 50 x 50 x 1.5 | 2.28 |
| 50 x 50 x 2.0 | 2.93 | 50 x 50 x 2.5 | 3.71 |
| 50 x 50 x 3.0 | 4.39 | 50 x 50 x 4.0 | 5.72 |
| 50 x 50 x 5.0 | 6.97 | 60 x 60 x 3.0 | 5.34 |
| 60 x 60 x 4.0 | 6.97 | 60 x 60 x 5.0 | 8.54 |
| 60 x 60 x 6.0 | 9.45 | 70 x 70 x 3.0 | 6.28 |
| 70 x 70 x 3.6 | 7.46 | 70 x 70 x 5.0 | 10.11 |
| 70 x 70 x 6.3 | 12.5 | 70 x 70 x 8 | 15.3 |
| 75 x 75 x 3.0 | 7.07 | 80 x 80 x 3.0 | 7.22 |
| 80 x 80 x 3.6 | 8.59 | 80 x 80 x 5.0 | 11.7 |
| 80 x 80 x 6.0 | 13.9 | 90 x 90 x 3.0 | 8.01 |
| 90 x 90 x 3.6 | 9.72 | 90 x 90 x 5.0 | 13.3 |
| 90 x 90 x 6.0 | 15.76 | 90 x 90 x 8.0 | 20.4 |
| 100 x 100 x 3.0 | 8.96 | 100 x 100 x 4.0 | 12 |
| 100 x 100 x 5.0 | 14.8 | 100 x 100 x 5.0 | 14.8 |
| 100 x 100 x 6.0 | 16.19 | 100 x 100 x 8.0 | 22.9 |
| 100 x 100 x 10 | 27.9 | 120 x 120 x 5 | 18 |
| 120 x 120 x 6.0 | 21.3 | 120 X 120 X 6.3 | 22.3 |
| 120 x 120 x 8.0 | 27.9 | 120 x 120 x 10 | 34.2 |
| 120 X 120 X 12 | 35.8 | 120 X 120 X 12.5 | 41.6 |
| 140 X 140 X 5.0 | 21.1 | 140 X 140 X 6.3 | 26.3 |
| 140 X 140 X 8 | 32.9 | 140 X 140 X 10 | 40.4 |
| 140 X 140 X 12.5 | 49.5 | 150 X 150 X 5.0 | 22.7 |
| 150 X 150 X 6.3 | 28.3 | 150 X 150 X 8.0 | 35.4 |
| 150 X 150 X 10 | 43.6 | 150 X 150 X 12.5 | 53.4 |
| 150 X 150 X 16 | 66.4 | 150 X 150 X 16 | 66.4 |
| 180 X 180 X 5 | 27.4 | 180 X 180 X 6.3 | 34.2 |
| 180 X 180 X 8 | 43 | 180 X 180 X 10 | 53 |
| 180 X 180 X 12.5 | 65.2 | 180 X 180 X 16 | 81.4 |
| 200 X 200 X 5 | 30.5 | 200 X 200 X 6 | 35.8 |
| 200 x 200 x 6.3 | 38.2 | 200 x 200 x 8 | 48 |
| 200 x 200 x 10 | 59.3 | 200 x 200 x 12.5 | 73 |
| 200 x 200 x 16 | 91.5 | 250 x 250 x 6.3 | 48.1 |
| 250 x 250 x 8 | 60.5 | 250 x 250 x 10 | 75 |
| 250 x 250 x 12.5 | 92.6 | 250 x 250 x 16 | 117 |
| 300 x 300 x 6.3 | 57.9 | 300 x 300 x 8 | 73.1 |
| 300 x 300 x 10 | 57.9 | 300 x 300 x 8 | 90.7 |
| 300 x 300 x 12.5 | 112 | 300 x 300 x 16 | 142 |
| 350 x 350 x 8 | 85.7 | 350 x 350 x 10 | 106 |
| 350 x 350 x 12.5 | 132 | 350 x 350 x 16 | 167 |
| 400 x 400 x 10 | 122 | 400 x 400 x 12 | 141 |
| 400 x 400 x 12.5mm | 152 | 400 x 400 x 16 | 192 |
A500 Rectangular Grade A, B, C, D 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 |
Manufacturing Process of ASTM A500 Tubes
Cold Forming: The steel is cold-formed into the desired shape, ensuring precise dimensions and enhanced mechanical properties.
Welding: The tubes are electric resistance welded (ERW) to form a solid, continuous structure.
Cutting & Sizing: The tubes are cut to required lengths and subjected to dimensional accuracy checks.
Inspection & Testing: Various tests, including hydrostatic and non-destructive examinations, are conducted to ensure structural integrity.
Surface Finish: The tubes undergo surface treatments to enhance corrosion resistance and aesthetics.
Applications
1. Construction and Structural Engineering
Building frames and columns
Bridges and infrastructure projects
Roof trusses and support systems
Canopies and mezzanines
2. Mechanical and Industrial Uses
Conveyor systems
Machinery frames
Storage racks and shelving
Signposts and light poles
3. Transportation and Automotive
Chassis components
Trailer frames
Agricultural equipment
4. Furniture and Architectural Applications
Handrails and guardrails
Decorative structures
Support beams in modern architecture