Mild Steel ERW Hollow Sections for General Engineering
Mild Steel ERW Hollow Sections for General Engineering
Specifications
ERW Hollow Section is a type of steel pipe that is commonly used in construction and industrial projects. It is produced using Electric Resistance Welding (ERW) technology, which involves welding the edges of the steel strip together to form a tube.
| American Standard | Standard Name |
| A500/A500M | Standard Specification for Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes |
ERW Hollow Sections 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. |
||||
ERW Hollow Sections 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. |
||||
ERW Hollow Sections Manufacturing Process
ERW Hollow Sections Application
- Structural Frameworks in Construction
- Infrastructure and Public Works
- Oil and Gas Industry
- Water Supply and Fluid Conveyance
- Agriculture and Irrigation
- Automotive and Transportation Industry
- Mechanical and General Engineering
- Scaffolding and Temporary Structures
- Furniture and Retail Displays
ERW Hollow Sections Packing & Loading
Hollow Section is transported in containers
Hollow Section is transported in containers
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.