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Help Center304 Stainless Steel Square Pipe 20x20mm-100x100mm 1.5mm-5mm Wall Thickness for Construction
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Hemaokang Steel (Shandong) Co., Ltd. proudly presents our premium 304 Stainless Steel Square Pipe – a versatile and durable solution for construction and structural applications. Manufactured with precision and backed by our ISO9001 quality management system, these square pipes offer excellent corrosion resistance, high strength, and a clean aesthetic finish. With sizes ranging from 20x20mm to 100x100mm and wall thicknesses from 1.5mm to 5mm, our product line meets diverse project requirements worldwide. As a company with annual export value exceeding US$50 million, we ensure consistent quality, competitive pricing, and reliable supply to global markets.
Key Features and Product Details
- Material Excellence: Grade 304 stainless steel (0.08% carbon max, 18-20% chromium, 8-10.5% nickel) provides outstanding resistance to rust, oxidation, and chemical exposure, making it ideal for both indoor and outdoor construction.
- Precision Dimensions: Sizes available from 20x20mm up to 100x100mm, with wall thickness options of 1.5mm, 2.0mm, 2.5mm, 3.0mm, 4.0mm, and 5.0mm. Tolerance meets ASTM A554 and GB/T 6728 standards.
- Durable Construction: Manufactured by cold forming from stainless steel coils and TIG welded longitudinally, ensuring seamless appearance and consistent mechanical properties.
- Surface Options: Choose from 2B mill finish, No.4 brushed, BA bright annealed, or custom polishing to match your project’s aesthetic requirements.
- Customizable Lengths: Standard length is 6 meters, but we can cut to your specified length (minimum 1 meter) or supply random lengths upon request.
- Wide Application: Ideal for structural supports, handrails, balustrades, frames, architectural trims, machinery guarding, and decorative elements in commercial buildings, bridges, and industrial facilities.
Technical Specifications
| Parameter | Value |
|---|---|
| Standard | ASTM A554, JIS G3446, GB/T 6728 |
| Grade | 304 (1.4301) |
| Outside Dimensions | 20x20mm – 100x100mm (square) |
| Wall Thickness | 1.5mm – 5.0mm |
| Length | 6m (standard) or customizable |
| Surface Finish | 2B, No.4, BA, brushed, or mirror polish |
| Tensile Strength | ≥515 MPa |
| Yield Strength | ≥205 MPa |
| Hardness | ≤ HRB 90 |
| Certification | ISO9001:2015 |
Advantages and Benefits
- Long Service Life: 304 stainless steel offers excellent corrosion resistance in atmospheric, fresh water, and many chemical environments, reducing maintenance costs and replacement frequency.
- High Load-Bearing Capacity: The square cross-section provides superior torsional rigidity compared to round pipes of similar weight, making it ideal for structural frames and columns.
- Easy Fabrication: Can be cut, welded, drilled, and bent using standard methods. Our pipes are straight and square, ensuring accurate fit-up during assembly.
- Consistent Quality: Each batch undergoes strict raw material inspection, dimensional checks, and mechanical testing in our ISO9001-certified facility.
- Cost-Effective: Direct factory supply eliminates middleman markups. We offer competitive pricing for both small and large volume orders (MOQ: 1 ton per size).
- Global Logistics: With 51-100 employees and a dedicated export team, we ship to North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East. Sea freight can be arranged with LCL or FCL containers.
Trusted by the Industry
Hemaokang Steel (Shandong) Co., Ltd., established in 2025, has quickly grown to an annual export value of US$50 million – US$100 million. Our main markets cover over 30 countries across all continents, and we maintain a professional team of 51-100 employees. Our products are manufactured under strict ISO9001 quality control, ensuring that every square pipe meets the highest standards of dimensional accuracy, material composition, and surface finish. Whether you need a small quantity for a prototype or a full container for a large construction project, we are ready to serve you with fast response, competitive terms, and reliable after-sales support. Contact us today for a quote or technical consultation.
Frequently Asked Questions
1. What is the difference between 304 and 316 stainless steel square pipe?
304 is the most common grade for general construction and food processing, offering excellent corrosion resistance. 316 contains molybdenum, providing better resistance to chlorides and sea water, but at a higher cost. For most indoor and outdoor construction applications, 304 is sufficient.
2. Can you supply square pipes with a length longer than 6 meters?
Yes, we can produce custom lengths up to 12 meters, depending on the thickness and size. Please specify your required length when ordering.
3. What surface finishes are available?
We offer standard 2B (cold rolled, matte), No.4 (brushed), BA (bright annealed), and mirror polish. Custom finishes like hairline or embossed are available for large orders.
4. How do you ensure the quality of the pipes?
Our factory is ISO9001 certified. Every production batch is tested for chemical composition, tensile strength, yield strength, hardness, and dimensional tolerance. We also provide a mill test certificate upon request.
5. What is the minimum order quantity (MOQ)?
The MOQ is 1 ton per size per order. For smaller quantities, we may be able to accommodate from stock, subject to availability.
6. Do you offer samples before bulk order?
Yes, sample lengths of 300mm or 500mm can be provided. The sample is free of charge, but the buyer pays for shipping. We will deduct the sample cost from the first order.
7. What is the typical lead time?
For standard sizes and 1-10 tons, lead time is 7-10 days after order confirmation. Larger quantities or non-standard sizes may require 15-20 days.
8. Can you cut the pipes to specific lengths?
Yes, we can cut to any length between 1m and 6m with a tolerance of ±2mm. Custom cutting is included in the price for standard orders.
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