Mirror Polished 304 Stainless Steel Square Tubing 50x50mm x 3mm High Gloss Surface for Furniture & Architecture

Products Specification

Stainless Steel Square Tubes: A Technical Overview

1. Introduction
Stainless steel square tubes are hollow structural sections (HSS) with equal side lengths and a square cross-section. Made from iron-chromium (and often nickel) alloys, they combine high strength, excellent corrosion resistance, and aesthetic appeal. They are formed through processes like welding seamless tubing or extrusion, making them versatile for both structural and decorative applications.

2. Common Grades (Alloys)
Key stainless steel grades for square tubes:

• 304/L (1.4301/1.4307): Most common. Excellent corrosion resistance, formability, and hygiene. 304L has low carbon for welding.

• 316/L (1.4401/1.4404): Superior corrosion/chemical resistance (added molybdenum). Ideal for marine, chemical, and coastal environments.

• 201 (1.4372): Lower nickel content. Cost-effective for less corrosive environments (e.g., indoor decor).

• 430 (1.4016): Ferritic, magnetic. Moderate corrosion resistance for appliances and trim.

• Duplex (e.g., 2205): High strength and chloride resistance. Used in demanding offshore/oil & gas applications.

3. Standard Specifications

• Dimensions: Sides typically range from 5mm to 400mm (0.2" to 16").

• Wall Thickness: Commonly 0.5mm to 12.7mm (0.02" to 0.5"), available in schedules (e.g., SCH 5S to SCH 80S) or gauge.

• Length: Standard lengths 6m (20ft), customizable.

• Tolerances: Governed by standards like ASTM A554 (architectural) or ASTM A500 (structural).

4. Key Product Standards

• ASTM A554: Welded tubes for architectural/machine applications.

• ASTM A500: Structural tubing (carbon & stainless).

• ASTM A511/A269: Seamless & welded tubes for mechanical/pressure use.

• EN 10296-2: European standard for welded circular/non-circular tubes.

• JIS G3463: Japanese standard for square/rectangular tubes.

5. Primary Applications

• Construction: Handrails, framing, roofing, structural supports.

• Architecture: Modern façades, curtain walls, decorative elements.

• Industrial: Machinery guards, conveyor systems, process equipment.

• Transportation: Vehicle frames, exhaust components.

• Furniture: Tables, chairs, shelving (indoor/outdoor).

• Food/Beverage/Pharma: Hygienic processing systems (requires polished finishes).

6. Advantages vs. Alternatives

• Corrosion Resistance: Withstands moisture, chemicals, and extreme temperatures.

• Strength-to-Weight Ratio: High load capacity with reduced weight.

• Hygiene & Cleanability: Non-porous surface resists bacterial growth.

• Aesthetics: Sleek, modern look; available in polished, brushed, or colored finishes.

• Sustainability: 100% recyclable, long service life reduces replacement.

• Low Maintenance: No painting/coating required.

7. Related Products

• Stainless Steel Rectangular Tubes: Similar properties, rectangular cross-section.

• Stainless Steel Round Tubes (Pipes): For fluid transport or curved designs.

• Stainless Steel Angle/Channel Profiles: Complementary structural components.

• Carbon Steel Square Tubes: Lower cost but requires corrosion protection.

• Aluminum Square Tubes: Lightweight but lower strength and corrosion resistance.