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2″ Stainless Steel Rectangular Tube 316
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Size: 2
Product Type: Stainless Steel Rectangular Tube
Grade: 316 Stainless Steel
UOM: FT
Product Overview
Stainless steel rectangular tube 316 (AISI 316) is a premium austenitic alloy celebrated for its molybdenum content (2–3%), which enhances resistance to chlorides, acids, and pitting corrosion. Ideal for marine, chemical, and high-humidity environments, it combines strength, flexibility, and low maintenance into a single solution. Our brushed stainless steel rectangular tube variant offers a matte finish for enhanced durability and visual appeal, while standard polished versions provide a sleek, reflective surface.
As a leading supplier of 316 stainless steel rectangular tube, we adhere to international standards (ASTM A513, ISO 6385) and offer seamless, welded, or extruded tubing in custom dimensions. Perfect for bridges, pipelines, furniture, and automotive frames, our products are designed to withstand extreme conditions without compromising performance.
Key Specifications & Technical Attributes
Table 1: Core Specifications of 316 Stainless Steel Rectangular Tube
| Specification | Details |
|---|---|
| Material | AISI 316 stainless steel (16–18% Cr, 10–14% Ni, 2–3% Mo) |
| Wall Thickness | 1.2mm – 120mm (standard), Custom thickness available |
| Outer Diameter | 15mm – 600mm (standard), Up to 1,200mm for specialized projects |
| Length | 3m – 12m (standard), Custom lengths per order |
| Hardness | Rockwell B 85–95, Brinell 190–220 (annealed or cold-worked states) |
| Corrosion Resistance | Superior resistance to seawater, chlorides, and organic acids |
| Heat Resistance | Stable up to 1,600°C (short-term exposure), Ideal for high-temperature systems |
| Density | 8.03 g/cm³ |
| Young’s Modulus | 193 GPa |
Mechanical Properties & Performance
1. Tensile Strength & Bending Strength
Stainless steel rectangular tube 316 delivers exceptional tensile strength (515–700 MPa) and bending strength (420–570 MPa), making it suitable for load-bearing structures like bridge supports, railings, and industrial frames. Its high ductility allows seamless bending, cutting, or welding into complex shapes, while its fatigue resistance ensures longevity in dynamic environments such as automotive exhaust systems or conveyor belts.
2. Corrosion Resistance Mechanism
The chromium oxide layer in 316 stainless steel forms a self-healing barrier against oxidation, while molybdenum enhances resistance to pitting corrosion caused by chlorides. This dual defense makes it ideal for:
- Marine applications: Boat hulls, dock structures, and tidal energy systems.
- Chemical processing: Tanks, reactors, and piping exposed to corrosive fluids.
- High-humidity environments: Outdoor furniture, roofing, and ventilation systems.
3. Weight Calculation
The weight of a stainless steel rectangular tube is calculated using:
Weight (kg/m) = (Outer Diameter – Wall Thickness) × Wall Thickness × Density / 1000
Example: A 100mm × 6mm tube weighs 3.85 kg/m. Custom calculations are provided for bulk orders, including logistics and handling fees.
4. Common Rusting Issues & Solutions
Despite its corrosion resistance, stainless steel rectangular tube 316 may rust under specific conditions:
- Chloride Exposure: Saltwater or de-icing salts can degrade the passive layer. Regular cleaning and coatings (e.g., epoxy) mitigate risks.
- Mechanical Damage: Scratches or weld spatter exposes bare metal. Proper handling and post-processing (e.g., passivation) reduce this likelihood.
- High Temperatures: Prolonged exposure to extreme heat may weaken the oxide layer. Cooling systems and thermal insulation are recommended.
Manufacturing Process & Quality Assurance
Table 2: Production Workflow
| Step | Process | Purpose |
|---|---|---|
| Raw Material | High-purity chromium, nickel, molybdenum | Ensures alloy composition accuracy |
| Hot Rolling | Controlled heating at 1,150°C | Achieves uniform microstructure |
| Extrusion or Welding | Precision forming into rectangular cross-sections | Maintains dimensional accuracy |
| Annealing | Solution annealing at 1,040°C | Relieves internal stresses |
| Pickling & Passivation | Acid treatment to remove impurities | Restores corrosion resistance |
| Quality Control | UT, MT, and chemical analysis | Compliance with ASTM/ISO standards |
Applications Across Industries
- Infrastructure: Bridge supports, railway tracks, and highway guardrails.
- Construction: Steel frames, staircases, and façade cladding.
- Marine: Shipbuilding components, offshore platforms, and buoy structures.
- Automotive: Exhaust systems, chassis frames, and interior trim.
- Aerospace: Aircraft structural components and satellite housings.
Why Choose Our Stainless Steel Rectangular Tube?
- Superior Alloy Composition: Guaranteed 16–18% chromium, 10–14% nickel, and 2–3% molybdenum for unmatched corrosion resistance.
- Customization Options: Tailored wall thickness, outer diameter, and surface finishes (polished, brushed, matte).
- Rapid Delivery: State-of-the-art facilities ensure prompt delivery, with global logistics partnerships.
- Cost Efficiency: Bulk order discounts and competitive pricing without compromising quality.
- Technical Support: Free CAD drawings, material selection guidance, and compliance certificates (ISO, ASTM).
Frequently Asked Questions (FAQs)
Q: How does 316 stainless steel tube compare to 304?
A: 316 contains molybdenum, enhancing corrosion resistance to chlorides and acids—ideal for marine/chemical use.
Q: Can it be welded?
A: Yes, compatible with TIG, MIG, and plasma welding. Pre-heating may be required for thick walls.
Q: What is the maximum service temperature?
A: Up to 1,600°C for short-term exposure (e.g., aerospace applications).
Q: How do I prevent rust on brushed stainless steel tube?
A: Regular cleaning, avoid abrasive tools, and apply protective coatings for harsh environments.
Conclusion
Stainless steel rectangular tube 316 is a game-changer for industries demanding reliability in corrosive or high-stress conditions. At [Your Company Name], we specialize in delivering stainless steel rectangular tube 316 with precision, durability, and sustainability. Partner with us to unlock the full potential of this alloy for your next project!
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