316L Stainless Steel Square Pipe 30x30mm 3mm Marine Grade

316L stainless steel square tubes are a low-carbon variant of 316 stainless steel, renowned for exceptional corrosion resistance—especially in aggressive environments like saltwater and chemical exposures. Their square cross-section adds structural stability, making them a staple in demanding industrial and architectural applications.

316L stainless steel square tubes are hollow, square-shaped components crafted from 316L alloy, a molybdenum-containing austenitic stainless steel. The "L" denotes low carbon (≤0.03%), which minimizes carbide precipitation during welding—critical for maintaining corrosion resistance in welded structures. This alloy bridges strength, formability, and durability, outperforming standard 304 in harsh conditions.

The precise chemistry of 316L ensures its unique properties:

316L square tubes balance strength and flexibility:

• Side Length: 10mm to 300mm (e.g., 25×25mm, 60×60mm, 150×150mm)
• Wall Thickness: 0.8mm to 12mm (thicker walls for high-pressure or heavy-load use)
• Length: Standard 6m; customizable up to 12m for large-scale projects
• Finish:
  • Mill finish (2B): Smooth, for industrial use
  • Polished (BA/mirror): Reflective, for decorative applications
  • Brushed: Matte texture, common in marine or architectural trim

316L square tubes excel in environments where corrosion resistance is non-negotiable:

• Marine Engineering: Boat railings, hull supports, offshore platforms (resists saltwater)
• Chemical Processing: Piping, reaction vessel frames, and storage tank components (withstands acids/alkalis)
• Medical Equipment: Surgical tool frames, sterilization units (hygienic and rust-proof)
• Food & Beverage: Conveyor systems, brewing equipment (easy to clean, no contamination risk)
• Coastal Architecture: Outdoor handrails, facades, and sculptures (resists sea spray)
• Oil & Gas: Downhole tubing, offshore rig structures (tolerates harsh drilling fluids)

• Superior Corrosion Resistance: Outperforms 304 in chloride-rich environments (e.g., seawater, de-icing salts) due to molybdenum
• Weldability: Low carbon content reduces carbide precipitation, ensuring welded joints retain corrosion resistance
• High-Temperature Stability: Maintains strength at temperatures up to 800°C, suitable for high-heat applications
• Longevity: With minimal maintenance, lifespan exceeds 50 years in most environments
• Hygiene: Non-porous surface resists bacterial growth, ideal for food/medical use

316L stainless steel square tubes stand out for their low-carbon composition, molybdenum-enhanced corrosion resistance, and structural stability. They are the go-to choice for marine, chemical, and high-humidity applications where durability and reliability are critical. Whether in industrial machinery or coastal architecture, 316L delivers performance that balances strength, longevity, and adaptability.