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3″ Stainless Steel Square Tube 304
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Size: 3
Product Type: Stainless Steel Square Tube
Grade: 304 Stainless Steel
UOM: FT
Product Overview
304 stainless steel square tubes are a cornerstone of modern engineering, combining corrosion resistance, structural strength, and aesthetic appeal. Ideal for high-stress environments, these tubes are widely used in frameworks, machinery, and architectural designs. Our products meet ASTM A554, EN 10296-2, and JIS G3466 standards, ensuring compliance with global quality benchmarks.
Technical Specifications
Below is a detailed breakdown of dimensions, mechanical properties, and manufacturing processes:
| Parameter | Standard Sizes | Wall Thickness | Hardness (HV) | Surface Finish | Manufacturing Process |
|---|---|---|---|---|---|
| Outer Dimensions | 10mm – 150mm | 0.8mm – 12mm | 150–220 | Mill Finish | Cold Rolled & Welded |
| Tolerance | ±0.1mm | ±0.05mm | – | Polished | Seamless (Custom Orders) |
| Length | 1m – 6m | – | – | Brushed | Annealed & Pickled |
| Customization Options | Available | Available | – | Powder-Coated | Laser-Cut Edges |
In-Depth Technical Explanations
1. Tensile Strength & Bending Performance
The tensile strength of 304 stainless steel square tubes ranges between 520 MPa and 650 MPa, making them suitable for load-bearing structures like bridges, conveyor systems, and industrial shelving. This metric defines the maximum stress the material can withstand before fracturing under tension.
Bending strength, measured at 350–550 MPa, ensures the tubes retain their shape under lateral forces. This property is critical for applications like handrails, automotive frames, and support beams, where deformation resistance is paramount.
2. Identification & Certification
Authentic 304 stainless steel is identified through:
- Grade Markings: Laser-etched “304” or “AISI 304” on the surface.
- Chemical Analysis: Confirming 18–20% chromium, 8–10.5% nickel, and ≤0.08% carbon content.
- Certifications: Mill test reports (MTRs) validating compliance with ASTM/EN standards.
Third-party lab testing ensures traceability and material integrity, providing peace of mind for critical projects.
3. Weight Calculation Method
While formulas are avoided per your request, the weight of a stainless steel square tube depends on its outer dimensions and wall thickness. As a general guideline:
- Thinner walls (e.g., 1–3mm) reduce weight for applications like furniture or decorative trim.
- Thicker walls (e.g., 6–12mm) increase load capacity for structural frameworks.
Contact our team for precise weight estimates tailored to your project specifications.
4. Corrosion Resistance & Rust Prevention
Though 304 stainless steel is highly resistant to oxidation, rust can occur under specific conditions:
- Chloride Exposure: Prolonged contact with seawater or de-icing salts may cause pitting corrosion.
- Mechanical Damage: Scratches or dents can compromise the protective chromium oxide layer.
- High-Temperature Environments: Thermal stress in industrial settings may accelerate oxidation.
Preventative Measures:
- Regular cleaning with pH-neutral solutions to remove contaminants.
- Application of protective coatings (e.g., PTFE) for harsh environments.
- Avoid pairing with incompatible metals (e.g., carbon steel) to prevent galvanic corrosion.
Applications Across Industries
304 stainless steel square tubes are indispensable in:
- Construction: Structural frameworks, roofing supports, and modular buildings.
- Food & Beverage: Hygienic processing equipment, storage racks, and conveyor belts.
- Renewable Energy: Solar panel mounts, wind turbine components, and hydropower systems.
- Transportation: Railings, cargo containers, and marine vessel fixtures.
Quality Assurance & Testing Protocols
Our stainless steel square tubes undergo rigorous inspections, including:
- Ultrasonic Testing: Detects internal flaws or inconsistencies in welds.
- Eddy Current Testing: Verifies surface integrity and resistance to cracks.
- Hydrostatic Pressure Tests: Ensures leak-proof performance for fluid transport systems.
Customization & Value-Added Services
- Cut-to-Length: Precision cutting for on-site installation efficiency.
- Surface Treatments: Bead blasting, mirror polishing, or anti-fingerprint finishes.
- Packaging: Wooden crates or PVC wrapping to prevent transit damage.
Why Choose Our 304 Stainless Steel Square Tubes?
- Global Compliance: Adherence to ISO, ASTM, and RoHS directives.
- Competitive Pricing: Factory-direct rates with volume discounts.
- Rapid Lead Times: 90% of orders ship within 48 hours.
- Technical Expertise: 24/7 engineering support for design optimization.
- Sustainability: Eco-conscious production with 70% recycled content.
Frequently Asked Questions (FAQs)
Q: Can 304 stainless steel square tubes withstand outdoor weather?
A: Yes, their chromium content provides excellent resistance to rain, humidity, and UV exposure.
Q: Are these tubes suitable for high-temperature applications?
A: 304 stainless steel performs well up to 870°C (1600°F). For extreme heat, consider 310 or 316 grades.
Q: How do I request a custom size?
A: Submit your requirements via our online form or contact sales@yourcompany.com for a quote.
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