1. What Is 304 Stainless Steel Rectangular Tubing?
304 stainless steel rectangular tubing is a hollow structural section (HSS) manufactured from grade 304 austenitic stainless steel. This alloy contains approximately 18-20% chromium and 8-10.5% nickel, with controlled amounts of carbon (≤0.08%), manganese (≤2.0%), silicon (≤1.0%), phosphorus (≤0.045%), and sulfur (≤0.03%). When selecting 304 stainless steel rectangular tube sizes for your project, it is essential to consider wall thickness, outer dimensions, and surface finish according to application requirements.
The rectangular profile provides superior structural integrity compared to round tubes in applications requiring flat surfaces and directional load-bearing capacity. Typical stainless steel rectangular hollow section price varies depending on dimensions, wall thickness, surface finish, and market conditions, with 304 grade offering an optimal balance of cost and performance. Thanks to its excellent combination of strength, formability, and corrosion resistance, 304 SS rectangular tubing has become a preferred material choice across diverse industries worldwide.
Manufactured through cold-forming and welding processes in accordance with ASTM A554 304 stainless steel tubing and ASTM A312 standards, the tubing is available in a wide range of dimensions. Leading 304 SS rectangular pipe suppliers offer both standard stock sizes and custom fabrication services to meet precise engineering specifications, enabling designers and fabricators to source exactly what they need.
2. Mechanical & Physical Performance
304 stainless steel rectangular tubing delivers outstanding 304 stainless steel rectangular tube properties suitable for demanding structural and industrial environments. For quick estimation, most suppliers provide a stainless steel rectangular tubing weight chart based on standard dimensions and wall thickness combinations.
| Property | Value |
|---|---|
| Tensile Strength | ≥ 515 MPa (75,000 psi) |
| Yield Strength (0.2% offset) | ≥ 205 MPa (30,000 psi) |
| Elongation | ≥ 40% in 50 mm |
| Hardness | Rockwell B70 max / Brinell 201 max |
| Density | 8.0 g/cm³ |
| Melting Range | 1400 – 1450°C |
| Thermal Conductivity | 16.2 W/m·K at 100°C |
| Oxidation Resistance | Excellent up to 870°C (intermittent) |
304 SS exhibits exceptional corrosion resistance in a broad range of atmospheric environments and corrosive media, including most oxidizing acids. It maintains good mechanical properties at both cryogenic and elevated temperatures, making it versatile across temperature extremes. These 304 ss rectangular tube mechanical specifications ensure reliable performance in applications ranging from cryogenic storage to high-temperature exhaust systems.
3. Key Advantages of 304 SS Rectangular Tubing
- Superior Corrosion Resistance: The high chromium content forms a passive chromium oxide layer, providing excellent protection against oxidation, pitting, and crevice corrosion in various environments including acidic, alkaline, and chloride-containing media. This makes corrosion resistant rectangular stainless steel tubing an ideal choice for marine, chemical, and outdoor architectural applications where long-term durability is critical.
- High Strength-to-Weight Ratio: The rectangular hollow profile delivers exceptional structural performance while maintaining a lightweight design, reducing material cost and structural load. For applications demanding both lightweight and strong stainless steel rectangular tubes, 304 grade consistently outperforms carbon steel alternatives in strength-to-weight comparisons.
- Excellent Weldability & Formability: Easily welded using standard techniques (TIG, MIG, resistance welding) without requiring post-weld annealing for most applications. Can be bent, cut, and fabricated to precise specifications. The weldability of 304 stainless rectangular hollow sections significantly reduces fabrication time and cost compared to higher-alloy stainless grades.
- Aesthetic & Hygienic Surface: Smooth, bright finish ideal for architectural and food-grade applications. Non-porous surface resists bacterial growth and is easy to sanitize. Polished stainless steel rectangular tubing with 180-grit or 240-grit finishes is widely specified for visible architectural elements and food grade stainless steel rectangular tubing applications requiring sanitary standards.
- 100% Recyclable: 304 stainless steel is fully recyclable at end-of-life, supporting sustainable construction and LEED certification goals.
- Low Lifecycle Cost: Minimal maintenance requirements and long service life (decades) significantly reduce total ownership cost compared to carbon steel alternatives. For buyers evaluating 304 stainless rectangular tube for construction projects, the long-term savings in maintenance and replacement costs deliver compelling total-cost-of-ownership advantages.
4. Industrial & Commercial Application Areas
304 stainless steel rectangular tubing serves a wide spectrum of industries, with rectangular stainless steel structural tubing applications spanning from heavy industrial environments to precision commercial installations:
| Industry | Typical Applications |
|---|---|
| ️ Construction & Architecture | Handrails, balustrades, structural frames, curtain wall supports, column cladding |
| Automotive & Transportation | Exhaust systems, roll cages, chassis components, roof racks |
| ️ Food & Beverage Processing | Conveyor systems, storage tanks, processing tables, sanitary piping |
| ️ Chemical & Petrochemical | Heat exchangers, pressure vessels, process piping, reactor components |
| Medical & Pharmaceutical | Hospital bed frames, surgical tables, cleanroom equipment, sterilization racks |
| Marine & Offshore | Boat railings, dock fittings, offshore platform handrails, desalination equipment |
| Furniture & Interior Design | Modern chair/table frames, shelving systems, display fixtures, decorative trims |
| ️ Oil & Gas | Refinery piping supports, umbilical tubing, instrumentation tubing |
Whether you require standard sizes or custom-fabricated rectangular tubing, 304 stainless steel provides the reliability, durability, and performance your project demands. For OEM buyers and project procurement teams seeking wholesale 304 stainless steel rectangular tubing from China, we offer competitive pricing, complete mill test certificates (MTC), and flexible delivery options including FOB, CIF, and DDP terms. Contact us today for a tailored quotation and technical consultation.
