Carbon steel welded square tubing is a critical component in modern steel construction due to its exceptional strength, durability, and cost-effectiveness.They are particularly useful in:

· Building Construction: As vertical columns, horizontal beams, and bracing elements in both commercial and industrial buildings.

· Bridges: As primary members in bridge decks and trusses.

· Industrial Equipment: In support structures for heavy machinery and conveyor systems.

Material Properties

· Typical Grades: ASTM A36, ASTM A500 (Grades A, B, and C), ASTM A501. 

· Sizes: Ranging from 10 mm x 10 mm to 300 mm x 300 mm, with wall thicknesses from 1.0 mm to 15 mm.

· Chemical Composition: Carbon (C) up to 0.25% max, Manganese (Mn) up to 0.60% max, Phosphorus (P) up to 0.040% max, Sulfur (S) up to 0.040% max, Silicon (Si) up to 0.35% max .

Specific Applications and Data

Example 1: Structural Columns in Commercial Buildings

· Scope: A commercial building utilizing carbon steel square tubes as load-bearing columns.

· Material: ASTM A36, 100x100x4.5 square tube.

· Load Capacity: Designed to support a compressive load of 1200 kN.

· Performance: The column's resistance is verified through both static and dynamic load tests, ensuring safety and reliability.

Example 2: Bridge Construction

· Scope: A pedestrian bridge using carbon steel square tubes for the handrails and crossbeams.

· Material: ASTM A500 Grade B, 80x80x3.5 square tube.

· Load Capacity: Estimated to withstand a load of 750 kN per beam.

· Durability: The tubes are galvanized for enhanced corrosion resistance, ensuring a service life of over 50 years.

Example 3: Industrial Support Structure

· Scope: A support frame for heavy machinery in a manufacturing plant.

· Material: ASTM A501, 150x150x6 square tube.

· Load Capacity: Capable of supporting a dynamic load of 2000 kN.

· Safety Features: The structure includes additional bracing for increased stability under heavy machinery operation.

The Advantage of Square Tubing in Steel Construction

· Strength and Rigidity: Provides robust support in structural applications.

· Cost-Effectiveness: Offers a competitive price-to-performance ratio.

· Versatility: Easily adaptable to various structural designs and loads.

· Weldability: Facilitates easy fabrication and integration into complex structures.

The Future of Square Tubing  

Carbon steel welded square tubing is a versatile and reliable choice for structural applications due to its strength, durability, and economic benefits. With proper design and engineering, these tubes ensure structural integrity and longevity in a variety of construction projects.