High Quality Mild Steel Hollow Structural Section
Specifications
ASTM A500 is the standard specification for cold-formed, welded, and seamless carbon steel structural tubing. Primarily used in construction and industrial fabrication, these square hollow sections provide a high strength-to-weight ratio. They are produced in Grades A, B, C, and D, with Grade C being the most common due to its superior yield strength (50,000 psi) compared to Grade B (46,000 psi) and Grade A (39,000 psi).
| American Standard |
Standard Name |
| A500/A500M |
Standard Specification for Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes |
Hollow Structural Section Chemical Composition
Sources American Standard A500 / A500M TABLE 1 Chemical Requirements
| Element |
Composition, % |
| Grades A, B and D |
Grace C |
| Heat |
Product |
Heat |
Product |
| Analysis |
Analysis |
Analysis |
Analysis |
| Carbon, max A |
0.26 |
0.3 |
0.23 |
0.27 |
| Manganese, max A |
1.35 |
1.4 |
1.35 |
1.4 |
| Phosphorus, max |
0.035 |
0.045 |
0.035 |
0.045 |
| Sulfur, max |
0.035 |
0.045 |
0.035 |
0.045 |
| Copper, min B |
0.2 |
0.18 |
0.2 |
0.18 |
A For each reduction of 0.01 percentage point below the specified maximum for carbon, an increase of 0.06 percentage point above the specified maximum for manganese is permitted, up to a maximum of 1.50% by heat analysis and 1.60% by product analysis.
B If copper-containing steel is specified in the purchase order. |
Hollow Structural Section Mechanical Properties
Sources American Standard A500 / A500M TABLE 2 Tensile Requirements
| Round structural tubing |
|
Grade A |
Grade B |
Grade C |
Grade D |
| Tensile strength, min, psi (MPa) |
45,000 (310) |
58,000 (400) |
62,000 (425) |
58,000 (400) |
| Yield strength, min, psi, (MPa) |
33,000 (230) |
42,000 (290) |
46,000 (315) |
36,000 (250) |
| Elongation in 2 in. (50 mm), min, %D |
25A |
23B |
21C |
23B |
| Shaped structural tubing |
|
Grade A |
Grade B |
Grade C |
Grade D |
| Tensile strength, min, psi (MPa) |
45,000 (310) |
58,000 (400) |
62,000 (425) |
58,000 (400) |
| Yield strength, min, psi, (MPa) |
39,000 (270) |
46,000 (315) |
50,000 (345) |
36,000 (250) |
| Elongation in 2 in. (50 mm), min, %D |
25A |
23B |
21C |
23B |
A Applies to specified wall thicknesses (t) equal to or greater than 0.120 in. (3.05 mm). For lighter specified wall thicknesses, the minimum elongation values shall be calculated by the formula: percent elongation in 2 in. (50mm) = 56t + 17.5, rounded to the nearest percent. For A500M use the following formula: 2.2t + 17.5, rounded to the nearest percent.
B Applies to specified wall thicknesses (t) equal to or greater than 0.180 in. (4.57 mm). For lighter specified wall thicknesses, the minimum elongation values shall be calculated by the formula: percent elongation in 2 in. (50 mm) = 61t + 12, rounded to the nearest percent. For A500M use the following formula: 2.4t + 12, rounded to the nearest percent.
C Applies to specified wall thicknesses (t) equal to or greater than 0.120 in. (3.05 mm). For lighter specified wall thicknesses, the minimum elongation values shall be by agreement with the manufacturer.
D The minimum elongation values specified apply only to tests performed prior to shipment of the tubing. |
Hollow Structural Section Manufacturing Process
Hollow Structural Section Application
- Structural Columns and Beams
- Bridge and Overpass Construction
- Transmission and Telecommunication Towers
- Mechanical and Engineering Applications
- Transportation and Heavy-Duty Trailers
- Infrastructure and Public Works
- Mining and Oil & Gas Industries
- Fencing, Gates, and Security Bollards
- Solar and Renewable Energy Mounts
- Architectural and Modern Design
- Shipbuilding and Marine Applications
Hollow Structural Section Packing & Loading
Hollow Section is transported in containers
Hollow Section is transported in containers
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