The Architectural Stainless Steel Rectangular Tube is specifically designed for visible, aesthetically demanding applications in building and design projects. Manufactured from high-quality austenitic stainless steel, this tube combines structural integrity with superior surface finish options. Its clean lines, sharp corners, and polished surfaces provide a modern, sophisticated appearance that complements contemporary architecture. Unlike standard industrial tubing, architectural grades feature enhanced surface quality, tighter dimensional tolerances, and superior finish consistency.
Product Specifications
| Parameter |
Details |
| Standards |
ASTM A554, EN 10219-2, JIS G3446 |
| Available Grades |
304, 304L, 316, 316L |
| Rectangular Sizes |
Width: 10 mm – 300 mm; Height: 20 mm – 200 mm |
| Wall Thickness |
0.8 mm – 4.0 mm |
| Length |
3m, 4m, 6m, or custom lengths |
| Manufacturing Process |
Welded – TIG (GTAW) or laser welded |
| Heat Treatment |
Annealed after welding |
| Surface Finish |
Brushed (180-400 grit), Polished (400-600 grit), Mirror (800+ grit), Satin |
| Corner Radius |
Sharp square or radiused (1.5x to 2.5x wall thickness) |
| Protection |
PVC film on polished surfaces |
Chemical Composition (Typical Values, %)
| Grade |
C ≤ |
Si ≤ |
Mn ≤ |
P ≤ |
S ≤ |
Cr |
Ni |
Mo |
| 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 |
Mechanical Properties (at Room Temperature)
| Grade |
Tensile Strength (MPa) min |
Yield Strength (MPa) min |
Elongation (%) min |
Hardness (HRB) max |
| 304 |
515 |
205 |
35 |
92 |
| 304L |
485 |
170 |
35 |
92 |
| 316 |
515 |
205 |
35 |
95 |
| 316L |
485 |
170 |
35 |
95 |
Tested in accordance with ASTM E8 / E8M.
Surface Finish Options
| Finish |
Grit |
Appearance |
Application |
| Brushed / Satin |
180-240 |
Directional grain, satin sheen |
Handrails, furniture, frames |
| Fine Brushed |
320-400 |
Fine grain, low reflectivity |
Interior trim, display cases |
| Polished |
400-600 |
Semi-reflective, smooth |
Elevator interiors, columns |
| Mirror |
800+ |
Highly reflective, glossy |
Luxury architecture, art pieces |
| Bead Blasted |
N/A |
Matte, uniform texture |
Anti-glare surfaces |
Key Features
- Superior Surface Quality – Scratch-free, consistent finish
- Tight Dimensional Tolerances – ±0.2 mm on width and height
- Sharp Corner Profile – Clean, modern aesthetic
- Excellent Corrosion Resistance – Suitable for indoor and outdoor use
- Low Maintenance – Easy to clean; resists fingerprints (brushed finish)
- High Strength-to-Weight Ratio – Efficient structural material
- Weldable – Clean welds with minimal discoloration
- 100% Recyclable – Environmentally sustainable
Dimensional Tolerances (Architectural Grade)
| Parameter |
Tolerance |
| Width / Height |
±0.2 mm for sizes ≤ 50 mm; ±0.4% for larger |
| Wall thickness |
±8% |
| Length |
+0 / -2 mm for fixed lengths |
| Straightness |
0.1% of total length |
| Twist |
1 mm + 0.3 mm per meter |
| Squareness |
90° ± 0.5° |
Fabrication Guidelines
| Operation |
Recommendation |
| Cutting |
Fine-tooth band saw or abrasive wheel; protect finish |
| Welding |
TIG (GTAW) with back purge; use matching filler |
| Drilling |
Sharp cobalt bits; low speed; protect surface |
| Bending |
Mandrel bender; radius ≥ 3x width |
| Cleaning |
Mild detergent; stainless steel cleaner; avoid abrasives |
| Surface Protection |
Keep protective film until final installation |
Contact Us
For inquiries, technical datasheets, or custom sizes, please contact our sales team.
