Square Tubes

ASTM A500 – ERW Square Structural Tubing

ASTM A500 is the standard specification for cold-formed, electric-resistance welded (ERW) carbon steel structural tubing in square, rectangular, and round shapes. This tubing is commonly used in construction, fabrication, and structural applications where strength, weldability, and cost-efficiency are key.

Square tubing produced under ASTM A500 is manufactured through a cold-forming process followed by ERW welding, resulting in a high-strength, uniform product with excellent surface finish and dimensional consistency.

Available in Grades A, B, C, and D, with Grade B and Grade C being the most commonly stocked, ASTM A500 square tubing is ideal for:

  • Structural supports and framing
  • Building and bridge construction
  • Fabricated components
  • Architectural and exposed applications

Key benefits include:

  • High strength-to-weight ratio
  • Excellent weldability and formability
  • Clean, sharp corners and consistent wall thickness
  • Hollow design ideal for concealing wiring or components

ASTM A500 square tubing is offered in a range of wall thicknesses and sizes, making it a versatile solution for a wide variety of structural needs.