Home
About Us
Stainless Steel Square Tube
Product Overview
Stainless steel square tubes are hollow, four-equal-side structural sections widely used in industrial, architectural, and decorative applications. Manufactured from premium stainless steel grades, our square tubes offer excellent corrosion resistance, high strength-to-weight ratio, superior weldability, and an attractive appearance. They are produced through precision welding or seamless processes, strictly controlled to meet international standards, ensuring consistent dimensional accuracy and mechanical properties.
Square tubes combine functionality with aesthetics, making them indispensable in modern construction, machinery manufacturing, transportation, and consumer goods.
Core Advantages for Global Buyers
We’ve designed our stainless steel square pipes to solve the most common pain points faced by international buyers—quality inconsistencies, high costs, delivery delays, and compliance risks.
✅ Superior Corrosion Resistance & Durability
Crafted from high-purity stainless steel, our square pipes resist rust, oxidation, and chemical erosion. The 316L grade, in particular, offers exceptional resistance to saltwater and acidic environments, reducing maintenance and replacement costs over the product’s lifespan—critical for long-term projects like marine construction or industrial piping.
✅ Cost-Effective Procurement
Direct Factory Supply: We eliminate middlemen, offering competitive wholesale prices without sacrificing quality.
Bulk Order Discounts: Volume orders (≥5 tons) enjoy preferential pricing, lowering your per-unit cost.
Minimized Waste: Custom length options reduce on-site cutting waste, while standard sizes simplify inventory control and reduce storage costs.
✅ Global Compliance & Quality Assurance
All products hold ISO 9001/14001 certifications and meet international standards. We provide full documentation for every batch, including:
Material test reports (chemical composition, mechanical properties)
Corrosion resistance test certificates
SGS/BV third-party inspection reports (on request)This ensures full compliance with local regulations, avoiding customs delays and quality disputes.
✅ Flexible Supply & Fast Delivery
In-Stock Standard Sizes: Immediate shipment for 304/316L common sizes (lead time: 7–12 days).
Efficient Custom Orders: Tailored sizes/thicknesses produced in 20–30 days, with optimized workflows to avoid delays.
Global Logistics Partners: Collaborations with Maersk, COSCO, and other top carriers ensure on-time delivery to any port worldwide, with door-to-door options available.
✅ Unmatched Versatility
A single product line caters to multiple industries, reducing your procurement complexity. Our square pipes deliver consistent performance across architectural, industrial, and commercial applications, eliminating the need to source from multiple suppliers.
Common Metric Square Tube Sizes (mm) & Weight (kg/m)
| Size | Wall Thick (t) | Weight (kg/m) | Size | Wall Thick (t) | Weight (kg/m) |
| (A × A) | (A × A) | ||||
| 10 × 10 | 1 | 0.28 | 50 × 50 | 2 | 3.02 |
| 12 × 12 | 1 | 0.34 | 50 × 50 | 2.5 | 3.73 |
| 15 × 15 | 1 | 0.43 | 60 × 60 | 2 | 3.66 |
| 15 × 15 | 1.5 | 0.62 | 60 × 60 | 3 | 5.36 |
| 20 × 20 | 1 | 0.6 | 80 × 80 | 2 | 4.95 |
| 20 × 20 | 1.5 | 0.86 | 80 × 80 | 3 | 7.29 |
| 25 × 25 | 1 | 0.77 | 100 × 100 | 3 | 9.27 |
| 25 × 25 | 1.5 | 1.12 | 100 × 100 | 4 | 12.2 |
| 25 × 25 | 2 | 1.45 | 120 × 120 | 4 | 14.85 |
| 30 × 30 | 1.5 | 1.38 | 150 × 150 | 4 | 18.84 |
| 40 × 40 | 1.5 | 1.86 | 150 × 150 | 5 | 23.35 |
| 40 × 40 | 2 | 2.43 | 200 × 200 | 5 | 31.46 |
| 50 × 50 | 1.5 | 2.36 | 200 × 200 | 6 | 37.55 |
Core Product Specifications (Buyer-Oriented)
We offer a comprehensive range of standard and custom stainless steel square pipes, adhering to global quality standards (ASTM, JIS, GB/T) to ensure precision and compatibility. Each specification is designed to minimize your project costs, reduce installation rework, and align with your operational needs.
| Specification | Details | Buyer-Centric Benefit |
| Grade | 304, 316L, 304L, 321 | 304: Cost-efficient general-purpose grade (most widely purchased for standard projects)； 316L: Mo-containing grade with superior saltwater/chemical corrosion resistance (ideal for harsh environments)； Global standard grades eliminate compatibility issues and streamline customs clearance. |
| Size Range | Side Length (SL):20×20mm–200×200mm | Covers small structural components (e.g., frame brackets) to heavy-duty load-bearing supports |
| Wall Thickness (WT): 1.0mm – 12mm | Standard lengths simplify inventory management; custom lengths cut waste and on-site labor costs | |
| Length: 6m,12m (standard); custom lengths (3m–12m) available | ||
| Dimensional Tolerance | Side Length: ±0.1mm | Precise dimensions ensure seamless installation, reduce rework, and avoid project delays caused by ill-fitting parts |
| Wall Thickness: ±0.05mm | ||
| Length: ±50mm | ||
| Surface | 2B(Matte), BA (Mirror), 400#–800# Polished, Pickled & Passivated, Brushed | 2B: Budget-friendly for indoor structural use |
| BA/Polished: High-gloss finish for decorative applications (e.g., handrails, furniture frames) | ||
| Pickled & Passivated: Enhanced corrosion resistance for outdoor/industrial settings | ||
| Mechanical Properties | Tensile Strength: ≥520MPa | Easy to fabricate into custom components; durable under high load-bearing and pressure conditions for long-term projects |
| Yield Strength: ≥205MPa | ||
| Elongation: ≥35% | ||
| Weldable, Drillable, Bendable | ||
| Packing & Logistics | Bundle packing (waterproof paper + steel straps) + wooden pallets; custom laser marking (grade, size, batch number) supported; FOB/CIF/DAP/EXW terms available | Secure packaging prevents scratches, dents, and rust during long-distance shipping |
| Custom marking simplifies inventory tracking and brand identification | ||
| Flexible shipping terms adapt to your budget and delivery timeline |
Applications by Industry
Architecture & Construction: Handrails, balustrades, structural frames, curtain walls, facade cladding, canopies
Food & Beverage Industry: Conveyors, worktables, processing equipment, storage racks, sanitary piping
Chemical & Petrochemical: Heat exchangers, support structures, piping systems, storage tanks
Pharmaceutical: Cleanroom equipment, instrument frames, sterile workstations
Transportation: Bus/truck frames, cargo containers, handrails in transit vehicles, trailer components
Marine & Offshore: Boat rails, dock equipment, offshore platform handrails, shipboard structures
Machinery & Equipment: Machine guards, frames, bases, conveyor guides, robotic arms
Automotive: Exhaust components, trim, roll cages, chassis parts
Aerospace: Aircraft interior components, support brackets, cargo handling systems
Energy: Solar panel mounting structures, wind turbine components, power plant equipment
Consumer Goods: Furniture frames, display racks, shelving, fitness equipment, outdoor structures
FAQs (Frequently Asked Questions for Global Buyers)
We’ve curated the most critical questions from international buyers, addressing specifications, quality, delivery, and compliance to support your decision-making.
Q1: Do you support custom sizes and surface treatments for stainless steel square pipes?
A: Yes, we specialize in custom solutions to meet your unique project needs. We can customize:
Side length: 20mm×20mm – 200mm×200mm (any size in between)
Wall thickness: 1.0mm – 12mm
Length: 3m–12m (non-standard lengths available)
Surface treatments: BA mirror, 800# polished, brushed, or pickled & passivatedThe minimum order quantity (MOQ) for custom orders is 500kg, with lead times of 20–30 days.
Q2: What quality control measures do you implement before shipment to protect buyer interests?
A: We enforce a strict 3-step quality control process for every order:
Pre-Production Inspection: Verifies raw material quality and grade authenticity (via spectral analysis).
In-Production Check: Monitors dimensional accuracy, surface finish, and welding quality during manufacturing.
Final Shipment Inspection: Conducts random sampling to check dimensions, surface condition, and mechanical properties. We can also arrange SGS/BV third-party inspection at your request, providing a detailed inspection report for your records. Unqualified products are replaced immediately at no extra cost to you.
Q3: Do you provide certification and test reports for international shipments?
A: Absolutely. All our stainless steel square pipes come with:
ISO 9001/14001 certification
Batch material certificates (including chemical composition and mechanical properties)
Corrosion resistance test reports
SGS/BV third-party inspection reports (on request)For industry-specific certifications (e.g., FDA for food contact, CE for European markets), we assist in applying for additional documentation to ensure full compliance with local regulations.
Q4: How do you ensure product safety during shipping, and what payment terms do you support?
A: Shipping Safety: We use waterproof paper + steel straps for bundle packing and sturdy wooden pallets to prevent scratches/dents. We apply anti-rust oil for long-distance shipments and offer shipping insurance at your request to cover transportation losses.Payment Terms: We support flexible options for global buyers:
TT (30% deposit + 70% balance before shipment) – most common
L/C at sight – suitable for large orders
We are dedicated to delivering high-performance stainless steel square pipes, professional procurement support, and end-to-end after-sales service. Whether you are a distributor, contractor, or manufacturer, we tailor solutions to match your specific project needs. Contact us today for a competitive quote and sample!
Contact our sales team today for a quotation or to discuss your project requirements. We are committed to providing high-quality stainless steel square tubes that meet your exact specifications and delivery deadlines.
Your trusted partner in stainless steel solutions.For further technical information, pricing, or customization, please contact our sales team:
Tel/WA/Wechat: +86 13225105678
Email: sales01@duohessplate.com
Previous：no more
Next：no more