Square Steel HSS Tube

Square Hollow Structural Sections (HSS) deliver superior load-bearing capacity and aesthetic consistency for modern construction. Certified to ASTM A500 (Grade B/C) and ASTM A1085, these cold-formed welded tubes achieve 18–22% higher compressive strength than I-beams of equivalent weight. Available in sizes from ½"×½" to 12"×12" with wall thicknesses up to 0.5", they excel in seismic bracing, modular frameworks, and architectural columns.

‌Square HSS Tubing: High-Strength Structural Solutions for Axial & Flexural Load Systems

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Square Hollow Structural Sections (HSS) deliver superior load-bearing capacity and aesthetic consistency for modern construction. Certified to ASTM A500 (Grade B/C) and ASTM A1085, these cold-formed welded tubes achieve 18–22% higher compressive strength than I-beams of equivalent weight. Available in sizes from ½”×½” to 12″×12″ with wall thicknesses up to 0.5″, they excel in seismic bracing, modular frameworks, and architectural columns.

‌Key Technical Specifications & Compliance‌

‌Material Properties by Standard‌:

‌Standard‌	‌Yield Strength (MPa)‌	‌Tensile Strength (MPa)‌	‌Dimensional Tolerances‌
ASTM A500 Gr. B	≥315	400–550	±1% width, ±10% wall thickness
ASTM A1085	≥365	455–620	±0.75% width, ±5% wall
EN 10219 S355J2H	≥355	510–680	±1.2% width, ±8% wall

‌Dimensional Range & Weight‌:

‌Size (inches/mm)‌	‌Thickness (inches/mm)‌	‌Weight (lbs/ft/kg/m)‌	‌Section Modulus (in³/cm³)‌
1×1 / 25.4×25.4mm	0.125″ / 3.18mm	1.35 / 2.01	0.12 / 1.97
4×4 / 101.6×101.6mm	0.250″ / 6.35mm	12.21 / 18.17	7.15 / 117.2
8×8 / 203.2×203.2mm	0.375″ / 9.53mm	37.69 / 56.09	54.3 / 889.8

‌Certifications‌: ISO 9001:2015, CE Marking, AWS D1.1 welding compliance, and LEED v4.1 recyclability credits.

‌Engineering Advantages Over Competing Profiles‌

‌Uniform Stress Distribution‌: Symmetrical geometry reduces torsional buckling risk by 30–40% vs. rectangular HSS.
‌Architectural Versatility‌: 90° corners enable seamless integration with glass/metal cladding (Ra ≤1.6μm surface finish).
‌Corrosion Resistance‌: Hot-dip galvanizing (610 g/m²) or 3-coat epoxy systems (280μm DFT).
‌Cost Efficiency‌: 10–12% material savings vs. built-up box columns in high-rise cores.

‌Critical Applications & Project Case Studies‌

Square HSS is ideal for these demanding scenarios:

‌Commercial‌: High-rise building cores (8″×8″, ASTM A1085, 0.313″ wall).
‌Transportation‌: Pedestrian bridge piers (6″×6″, S355J2H, galvanized).
‌Industrial‌: Robotic arm supports (2″×2″, 0.188″ wall, powder-coated).
‌Energy‌: Solar farm mounting systems (3″×3″, ASTM A500 Gr. C).

‌Project Highlight‌: In Toronto’s SkyTower, 10″×10″ HSS (Grade 50) achieved 450 MPa axial load capacity while reducing column weight by 19% vs. reinforced concrete.

‌Customization & Quality Assurance‌

‌Processing Options‌:

‌Ends‌: Copied, notched, or slotted (ANSI/AISC 360-16).
‌Coatings‌: Interior zinc-rich primer (75μm) for HVAC ducts.
‌Lengths‌: Standard 20’–40’; custom-extruded up to 80’ (24.4m).

‌Testing Protocols‌:

‌Eddy Current Testing‌: Detects surface flaws ≥0.3mm deep.
‌Hardness Testing‌: 150–220 HBW (Brinell scale).
‌Squareness Verification‌: ±0.5° angle tolerance via laser alignment.

‌Why Choose Our Square HSS?‌
Our tubes provide 800–4,200 MPa·mm³ flexural rigidity and 0.98–1.02 squareness ratios for precision assembly. The EN 10219-compliant mill ensures ±0.15mm wall uniformity, while AISC 360-22 certification guarantees North American code compliance.

Download our free HSS load table to compare compression (P/A) and bending (M/S) capacities. Request a corrosion protection guide tailored to your environment (C3 urban to C5 industrial).

‌Packaging‌: Plastic end caps + steel banding; 40ft container holds 22–28 tons.
‌Lead Time‌: 30–50 days for stock sizes; 70–90 days for custom-coated orders.