Fábrica de tubos de acero inoxidable de Foshan Xinliheng
201 / 304 Tubo cuadrado sin costura de acero inoxidable
Seamless Strength. Dual Material Choice. Engineered for Performance.
🔲 No Weld Seam. Maximum Integrity. Choose: Cost-Effective 201 or Premium 304.
Introducing 201 / 304 Stainless Steel Seamless Square Tubes —
precision-engineered seamless structural profiles designed for high-pressure, high-strength, and critical applications where uniformity, durability, and reliability are non-negotiable.
Unlike welded tubes, our seamless square tubes are formed in a single extrusion process — eliminating weak points along the weld line. This results in:
- ✅ Higher burst pressure resistance
- ✅ Superior structural integrity
- ✅ Uniform wall thickness & dimensional accuracy
- ✅ Ideal for load-bearing, hydraulic, and precision machinery use
Disponible en SUS201 (economical) o SUS304 (premium corrosion resistance), these tubes offer the perfect balance of performance, cost, and longevity for industrial, mechanical, and architectural projects worldwide.
✅ Why Choose Our 201/304 Seamless Square Tubes?
1. True Seamless Construction – No Weak Points
- Manufactured via hot extrusion + cold drawing – no weld seam
- No risk of weld cracking, leakage, or uneven stress distribution
- Perfect for high-pressure systems, structural frames, and dynamic loads
- Smooth internal surface – ideal for fluid/gas transport or cable routing
2. Dual Material Options – Optimize Cost & Performance
| Grade | Best For | Corrosion Resistance | Cost Efficiency |
|---|---|---|---|
| SUS201 | Indoor industrial use, dry environments, cost-sensitive projects | Moderate | ✅✅✅ (Most Economical) |
| SUS304 | Outdoor exposure, humid conditions, food/pharma equipment | High | ✅✅ (Premium Durability) |
💡 Choose 201 for budget-friendly structural needs. Choose 304 for long-term corrosion resistance and broader application range.
3. Precision Dimensions & Tight Tolerances
- Size Range: 10×10mm – 100×100mm (outer dimensions)
- Wall Thickness: 1.0mm – 6.0mm
- Length: 1m, 2m, 3m, 4m, 5.8m, 6m (custom cut-to-length available)
- Tolerance:
- Dimension: ±0.1mm
- Wall Thickness: ±0.08mm
- Straightness: < 0.5mm/m
- Process: Hot Extruded → Cold Drawn (CD) for enhanced strength and finish
4. Available Surface Finishes
- Pickled & Annealed (2B) – standard industrial finish, smooth and clean
- Bright Annealed (BA) – reflective, low roughness, used in precision equipment
- Polished (Mirror 8K or Hairline HL) – decorative-grade finish for visible applications
- Oiled or Dry – anti-rust protection options
5. Rigorous Quality Control & Certifications
- Standard Compliance: ASTM A554, ASTM A312, JIS G3463, ISO 1127
- Testing Included:
- Eddy Current Testing (ECT)
- Hydrostatic Test (opcional)
- Tensile Test
- Flattening Test
- Intergranular Corrosion Test (for 304)
- Certifications: ISO 9001, SGS, RoHS
- MTR (Mill Test Report) provided with every batch
- Packaging: Anti-rust paper + plastic film + steel-banded wooden pallet (export-safe)
🏭 Premium Applications
| Industry | Use Cases |
|---|---|
| Industrial Machinery | Machine frames, robotic arms, linear guides, jigs & fixtures |
| Hydraulic & Pneumatic Systems | Fluid conveyance, cylinder components, high-pressure lines |
| Automotive & Transportation | Chassis parts, roll cages, interior support structures |
| Construction & Architecture | Load-bearing columns, structural supports, seismic bracing |
| Energy & Utilities | Solar mounting systems, battery enclosures, pump frames |
| Food & Pharma Equipment | Processing racks, conveyor frames, hygienic structures (304 only) |
🔧 Product Specifications
| Parameter | Details |
|---|---|
| Material | SUS201 o SUS304 (1.4301 / 06Cr19Ni10) |
| Shape | Square Tube – Seamless |
| Outer Size (milímetros) | 10×10 – 100×100 |
| Wall Thickness | 1.0mm – 6.0mm |
| Length | 1m, 2m, 3m, 4m, 5.8m, 6m (custom) |
| Process | Seamless (Hot Extruded + Cold Drawn) |
| Surface Finish | 2B (Pickled), BA (Bright), 8K Mirror, Hairline HL |
| Tolerance | ±0.1mm (size), ±0.08mm (wall) |
| Standards | ASTM A312, ASTM A554, JIS G3463, ISO 1127 |
| Optional | MTR, hydro test, laser marking, OEM packaging |
💬 Customer Feedback
“We switched from welded to seamless 304 square tubes for our machine frames — zero failures after 18 months. Worth the investment.”
— Robert, Mechanical Engineer, Alemania
“Used SUS201 seamless tubes for indoor equipment. Strong, straight, y 20% cheaper than 304. Perfect for our budget.”
— Anita, Procurement Lead, India
📞 Request a Free Sample & Quote Today!
✅ Tell us your size, material, and finish – we’ll provide a fast, accurate quote
✅ Free sample (100–200mm) for quality & fit testing
✅ MOQ bajo: 50 pcs per size (negotiable for trial orders)
✅ OEM/ODM supported – private label, custom lengths, logo engraving
👉 Contact Us Now o Correo electrónico: ventas@xlhsteel.com
📞 +86 133 6030 1537 | 🌐 www.xlhsteel.com
🌐 Why Choose Our 201/304 Seamless Square Tubes?
- ✅ No Weld Seam = Higher Strength & Reliability
- ✅ Dual Material Choice – Save with 201 or Upgrade to 304
- ✅ Precision Tolerances – Ideal for Engineering & Machinery
- ✅ Global Standards Compliant – Trusted Quality Worldwide
Strength without compromise. Precision without seams.
