304 BA Mirror Finish Stainless Steel Square Tube with TIG Welded Construction for Corrosion Resistant Handrails
The 304 BA (Bright Annealed) mirror finish stainless steel square tube delivers a premium chrome-like reflective aesthetic for architectural and interior design applications where visual impact and surface brilliance are primary selection criteria.
The 304 austenitic stainless steel grade (1.4301/S30400) provides excellent atmospheric corrosion resistance in indoor and sheltered outdoor environments, making it the industry standard for handrail systems, balustrade infill tubes, architectural column cladding, furniture frames, and retail display fixtures.
- Bright Annealed Mirror Finish: BA surface delivers bright, reflective appearance comparable to #8 mirror polished sheet metal, achieved without mechanical polishing through controlled atmosphere heat treatment
- No Electroplating Required: Integral BA finish eliminates environmental compliance issues, hydrogen embrittlement risk, and peeling/flaking problems associated with plated finishes
- Consistent Color and Reflectivity: Uniform silvery-white surface color throughout production lots ensures visual consistency in architectural projects
- Excellent Indoor Corrosion Resistance: 304 stainless steel resists tarnishing from humidity, fingerprints, and mild cleaning chemicals
- Weldable Without Finish Damage: TIG welding with argon back-purge protection produces clean, minimal-discoloration welds
- Design Flexibility: Square profile with crisp corner radii provides clean modern lines compatible with standard architectural hardware
| Parameter | Specification |
|---|---|
| Steel Grade | 304 (1.4301 / S30400 / 06Cr19Ni10) |
| Chemical Composition (Cr) | 18.0 - 20.0% |
| Chemical Composition (Ni) | 8.0 - 10.5% |
| Surface Finish | BA (Bright Annealed) Mirror |
| Wall Thickness | 1.0mm - 4.0mm |
| Section Size | 15x15mm to 100x100mm |
| Corner Radius | 1.0T - 2.5T (T = wall thickness) |
| Weld Type | TIG Welded, Bead Controlled |
| Length | 6000mm standard (3000mm / custom available) |
| Tensile Strength (Rm) | 520 MPa min |
| Yield Strength (Rp0.2) | 205 MPa min |
| Applicable Standards | ASTM A554, EN 10357, JIS G3446 |
304 BA mirror finish stainless steel square tubes are the preferred material for premium architectural handrail and balustrade systems in commercial buildings, shopping centers, airports, hotels, and high-end residential developments.
In retail environments, BA square tubes are widely used for display fixture construction including clothing rails, shelving support frames, merchandise presentation stands, and point-of-sale counters. Furniture designers specify these tubes for table bases, chair frames, shelving units, and decorative room dividers.
Exhibition stand builders and interior fit-out contractors utilize BA square tubes for modular structures, graphic panel frames, lighting support systems, wall cladding supports, and column wrapping frameworks in corporate offices, hotels, and restaurant interiors.
Each tube is wrapped with clear PE protective film with UV inhibitors and fitted with plastic end caps to prevent damage during handling and installation. Tubes are packed in ISPM 15 compliant fumigation-free plywood cases with foam interleaving separators.
Each shipment includes an EN 10204 3.1 inspection certificate with chemical analysis, mechanical properties, and dimensional conformance reports. Our ISO 9001:2015 certified quality system maintains full traceability from certified 304 stainless steel coil through every manufacturing operation.
Delivery: Standard stock sections ship within 5 working days; custom dimensions within 15-25 working days. We recommend retaining protective film throughout fabrication and removing only after final installation cleaning.
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