Load Bearing Stainless Steel Rectangular Section High Strength Stainless Steel HSS
The Load Bearing Stainless Steel Rectangular Section is a high-strength hollow structural section (HSS) engineered to support significant static and dynamic loads in construction, infrastructure, and industrial applications. Manufactured from premium austenitic or duplex stainless steel grades, this section provides exceptional mechanical properties, corrosion resistance, and fire performance. Its rectangular profile offers superior bending strength, torsional rigidity, and efficient load distribution, making it an ideal choice for columns, beams, trusses, and heavy-duty support structures. Unlike standard decorative tubing, load bearing sections are produced with stricter material certifications and enhanced weld integrity.
| Parameter | Details |
|---|---|
| Standards | EN 10219-2, ASTM A554, JIS G3446 |
| Available Grades | 304, 304L, 316, 316L, Duplex 2205 |
| Rectangular Sizes | Width: 40 mm – 400 mm; Height: 20 mm – 200 mm |
| Wall Thickness | 2.0 mm – 10.0 mm |
| Length | 6m, 12m, or custom lengths up to 18m |
| Manufacturing Process | Cold-formed welded or Hot-finished seamless |
| Heat Treatment | Annealed after manufacturing |
| Surface Finish | Mill finish, pickled, or primed |
| End Finish | Plain ends or beveled ends |
| Grade | C ≤ | Si ≤ | Mn ≤ | P ≤ | S ≤ | Cr | Ni | Mo | N |
|---|---|---|---|---|---|---|---|---|---|
| 304 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0-20.0 | 8.0-10.5 | – | – |
| 304L | 0.03 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0-20.0 | 8.0-12.0 | – | – |
| 316 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | – |
| 316L | 0.03 | 0.75 | 2.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | – |
| Duplex 2205 | 0.03 | 1.00 | 2.00 | 0.030 | 0.020 | 22.0-23.0 | 4.5-6.5 | 3.0-3.5 | 0.14-0.20 |
| Grade | Tensile Strength (MPa) min | Yield Strength (MPa) min | Elongation (%) min | Hardness (HB) max |
|---|---|---|---|---|
| 304 | 515 | 205 | 35 | 201 |
| 304L | 485 | 170 | 35 | 201 |
| 316 | 515 | 205 | 35 | 217 |
| 316L | 485 | 170 | 35 | 217 |
| Duplex 2205 | 620 | 450 | 25 | 290 |
Tested in accordance with EN ISO 6892-1 or ASTM E8.
| Property | Value |
|---|---|
| Mass per meter | 22.5 kg/m |
| Cross-sectional area | 2,860 mm² |
| Moment of inertia (Ixx) | 9.87 × 10⁶ mm⁴ |
| Moment of inertia (Iyy) | 5.12 × 10⁶ mm⁴ |
| Section modulus (Wxx) | 131.6 × 10³ mm³ |
| Section modulus (Wyy) | 68.3 × 10³ mm³ |
| Radius of gyration (ix) | 58.7 mm |
| Radius of gyration (iy) | 42.3 mm |
| Plastic modulus (Zxx) | 152.4 × 10³ mm³ |
Full section property tables available upon request for all sizes and grades.
| Size (mm) | Wall (mm) | Span (m) | Uniform Load (kN/m) | Point Load (kN) |
|---|---|---|---|---|
| 100×50×4 | 4.0 | 2.0 | 12.5 | 6.2 |
| 100×50×5 | 5.0 | 2.0 | 15.3 | 7.6 |
| 150×100×5 | 5.0 | 3.0 | 18.7 | 14.0 |
| 150×100×6 | 6.0 | 3.0 | 22.1 | 16.6 |
| 200×100×6 | 6.0 | 4.0 | 15.8 | 15.8 |
| 200×100×8 | 8.0 | 4.0 | 20.6 | 20.6 |
Values are indicative only. Final design per structural engineer. Contact us for detailed calculations.
High Load Capacity – Engineered for significant static and dynamic loads
Superior Strength-to-Weight Ratio – Efficient material usage
Excellent Torsional Rigidity – Closed section resists twisting
Corrosion Resistance – No coating required for most environments
Fire Resistance – Maintains strength at elevated temperatures
Ductility – Absorbs energy without brittle failure
Long Service Life – 50+ years with minimal maintenance
100% Recyclable – Environmentally sustainable
| Parameter | Tolerance |
|---|---|
| Width / Height | ±1% (min ±0.5 mm, max ±5 mm) |
| Wall thickness | ±10% |
| Length | +0 / -3 mm for fixed lengths |
| Straightness | 0.15% of total length |
| Twist | 2 mm + 0.5 mm per meter |
| Concave / Convex | 0.8% of width |
| Squareness of corners | 90° ± 1° |
Main structural columns
Primary and secondary beams
Roof trusses and rafters
Bracing members
Portal frame components
Mezzanine floor supports
Bridge truss members
Pedestrian footbridge girders
Highway gantry supports
Railway platform structures
Transmission tower components
Crane runway beams
Heavy equipment platforms
Conveyor support structures
Storage rack uprights
Machine bases and frames
Offshore platform structural members
Dock and pier supports
Shipbuilding frames
| Factor | Consideration |
|---|---|
| Buckling | Rectangular sections offer good resistance; check slenderness ratio |
| Deflection | Limit L/250 for floors; L/200 for roofs per building codes |
| Connection Design | Welded or bolted connections; use stainless steel fasteners |
| Local Buckling | Width-to-thickness ratios per EN 1993-1-4 or AISC Design Guide 27 |
| Fire Protection | Stainless steel often requires no additional fireproofing |
| Corrosion Allowance | No additional thickness required for corrosion |
| Property | Carbon Steel (S355) | Stainless 304 | Stainless 316 | Duplex 2205 |
|---|---|---|---|---|
| Yield strength (MPa) | 355 | 205 | 205 | 450 |
| Corrosion resistance | Poor (requires coating) | Excellent | Excellent | Excellent |
| Fire resistance | Good (requires protection) | Excellent | Excellent | Excellent |
| Maintenance | High (repainting) | Low | Low | Low |
| Initial cost | Low | Medium | High | High |
| Life cycle cost (50 years) | High | Low | Low | Low |
| Typical applications | Indoor, coated | Indoor/outdoor | Marine, chemical | High-stress, offshore |
| Process | Recommendation |
|---|---|
| Cutting | Band saw, plasma cutter, or abrasive wheel |
| Welding | TIG (GTAW) or MIG (GMAW); use matching filler (ER308/ER316/ER2209) |
| Drilling | Cobalt or carbide bits; use cutting fluid |
| Bolting | Use stainless steel bolts (A4-80 grade) |
| Grinding | Use dedicated stainless steel abrasives |
For inquiries, technical datasheets, section property tables, or custom sizes, please contact our sales team.
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