ASTM A500 Grade C welded square steel tube is a high-strength structural tubing solution engineered for demanding load-bearing applications. Cold-formed from carbon steel and electric resistance welded (ERW), this Grade C tubing delivers superior mechanical properties over Grades A and B, providing an excellent combination of strength, weldability, and dimensional precision for construction and industrial projects.
Key Features:
1) High yield strength for structural applications
2) Cost-effective solution for large-scale projects
3) Excellent weldability and formability
4) ERW process ensures uniform wall thickness
ASTM A500 Gr. C Chemical Composition & Mechanical Property:
Chemical Composition |
Chemical Composition, % | Grade C | Grade B |
C, max | 0.27 | 0.30 |
Mn, max | 1.40 | 1.40 |
P, max | 0.045 | 0.045 |
S, max | 0.045 | 0.045 |
Cu, min | 0.18 | 0.18 |
Tensile Requirements |
Grade | Yield Strength (min)
MPa (psi) | Tensile Strength (min)
MPa (psi) |
Grade C | 345 (50,000) | 425 (61,600) |
Grade B | 315 (46,000) | 400 (58,000) |
General information:
Standard: ASTM A500
Grade: C
Round: OD: 21.3-660mm; WT: 1.0-25mm; L: 6m / 12m
Square: 20x20mm - 500x500mm; WT: 1.0-25mm; L: 6m / 12m
Rectangular: 20×30 mm - 400×600 mm; WT: 1.0-25mm; L: 6m / 12m
Ends:
1) Plain or straight ends
2) Beveled ends
3) Threaded ends
Available Coating: Bared, black painted (mill varnish), oiled, hot-dip galvanized, anti-corrosion coating.
Package: bundled with steel strips for small or medium sizes, loose packing for large diameter pipes, each bundle will not exceed 3tons.
Shipment: Land transportation by truck or train, sea transportation by container shipment or bulk vessel.
Our Hebei K-Steel Pipe Industry advantage:
Flexible Project Customization
We provide tailored manufacturing solutions to meet diverse project requirements, including customized outer diameter, wall thickness, and length specifications. In addition, we offer precision end preparation and a full range of anti-corrosion coating options to ensure optimal performance in various operating environments. This flexibility enables us to deliver line pipe solutions that align seamlessly with your technical and application needs.
Fast & Reliable Lead Time
With strong mill partnerships and readily available inventory resources, we are able to shorten production cycles and respond quickly to urgent project demands. Our integrated supply network ensures stable material availability, efficient scheduling, and on-time delivery — helping clients keep their projects on track without delay.
Advanced Technical & Quality Assurance
Equipped with our own metallurgical laboratories and supported by trusted third-party inspection agencies, we ensure every line pipe meets international standards and project specifications. Comprehensive testing and verification guarantee consistent mechanical properties, chemical composition, and coating integrity, providing clients with reliable, high-quality pipeline solutions.
Rapid Delivery & Complete Logistics
Leveraging fast supply capabilities and a well-established logistics network, we ensure timely delivery of line pipes to any project location. Our streamlined transportation and warehousing system minimize lead time, helping clients maintain smooth operations and meet critical project schedules.
