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Tuberias

Structural tubing (square and rectangular), round bar, and mechanical tube in special steels offer higher strength, rigidity, and durability—ideal for demanding structures and industrial components.

Square Tubing ASTM A500 – Grade B/C

ASTM A500 square tubing is a cold-formed carbon steel structural tube, available welded or seamless, with a square (and commonly rectangular) section. It is designed for structural applications that require strength, dimensional uniformity, and ease of welding and machining. It complies with ASTM A500-23 in Grades B and C.

  • Material: cold-formed carbon steel.
  • Section: square (primary) and rectangular.
  • Standard length: 20' and 40' (6 m and 12 m); custom cuts available upon request.
  • Typical thicknesses: 0.065" to 0.5" (1.65 mm to 12.7 mm).
  • Weldable and suitable for machining.
  • High dimensional uniformity and flatness.
  • Mechanical strength: supports compression, bending, and torsion loads.
  • Versatility: easy to cut, weld, and assemble.
  • Durability: suitable for structures exposed to static and dynamic loads.
  • Precision: tight tolerances per ASTM A500 for proper assembly.
  • Civil construction: columns, secondary beams, steel frames.
  • Machinery and equipment: support structures, chassis, and frames.
  • Automotive/heavy equipment: frames, rails, and structural elements.
  • Infrastructure: bridges, handrails, sign supports.

Element

Grade B (%)

Grade C (%)

Carbon (C)

0.26 – 0.30

0.30 – 0.33

Manganese (Mn)

1.4 – 1.6

1.4 – 1.7

Phosphorus (P)

≤ 0.035

≤ 0.035

Sulfur (S)

≤ 0.045

≤ 0.045

Copper (Cu)

≤ 0.20

≤ 0.20

Property

Grade B

Grade C

Yield strength (ksi / MPa)

46 ksi / 320 MPa

50 ksi / 345 MPa

Tensile strength (ksi / MPa)

58 ksi / 400 MPa

62 ksi / 430 MPa

Elongation (%)

20%

18%

Brinell hardness (HB)

120 – 150

130 – 160

Nominal sizeTypical thicknessStandard length
1" x 1" – 12" x 12" (25 – 305 mm)0.065" – 0.5" (1.65 – 12.7 mm)20' y 40' (6 m y 12 m)
Rectangular: variations by supplierSimilarSimilar

 

  • ASTM A500 Grade B: similar to ASTM A36 in minimum tensile strength.
  • ASTM A500 Grade C: higher strength, comparable to some high-strength structural steels.
  • In engineering applications, verify weldability and load compatibility according to the selected grade.

ASTM A500 Grade B/C square tubing is a reliable and versatile structural profile, suitable for multiple industries that require strength, durability, and dimensional precision. The grade selection depends on the mechanical demand and application type to ensure safety and structural performance per ASTM.