Wuxi Xinshanhu Steel Co., Ltd.
Chinese stainless steel manufacturer existing for eleven years
Heavy-Duty Stainless Steel Square & Rectangular Tubes | Certified ASTM A554 Factory
We manufacture premier industrial and decorative stainless steel square and rectangular welded pipes. Produced strictly under the ASTM A554 standard, our tubing undergoes advanced online weld-bead conditioning and precise sizing induction. This guarantees perfectly square corners, exceptional torsional strength, and uniform wall thickness across every single bundle.
|
Parameter |
Range & Capabilities (ASTM A554 Standard) |
|
Material Grades |
Stainless Steel 304, 304L, 316, 316L, 201 |
|
Square Tube Size |
10mm x 10mm – 300mm x 300mm |
|
Rectangular Tube Size |
20mm x 10mm – 400mm x 200mm |
|
Wall Thickness |
0.5mm – 12.0mm |
|
Length |
Standard 5.8m, 6.0m, or Precise Custom Cut-to-Length |
Elite Weld Seam Integrity: Advanced automatic TIG and Plasma welding with precise online seam flattening. Zero cracking, pinholes, or internal structural weaknesses during 90-degree bending or hydro-testing.
Flawless Corner Geometry: Tight radius corners and high squareness accuracy ensure perfectly flush joints, speeding up your welding and assembly layout.
Strict Tolerance Controls: Outer diameter controlled within ± 0.1mm and thickness tolerances matching strict international ASTM requirements. No "hidden gauge reductions".
Structural & Engineering: Building handrails, structural balustrades, space frames, and glass curtain wall supports.
Machinery & Equipment: Heavy industrial machine frames, material handling conveyors, and automotive chassis components.
Decorative & Furniture: Modern luxury furniture frames, premium display racks, and interior architecture.
Fluid & Fluid Storage: Wastewater treatment frames, chemical framing, and food-grade pipe racking.
Trusted Stainless Steel Manufacturer, Customization, Free Samples, Factory Visits Anytime—Inquire Now!
Skip the local fabrication delays by getting ready-to-weld square tubing directly from our factory:
Surface Finishes: Mill Finish (Industrial unpolished), Grit 180/240/320 Satin Brushed, Hairline, 400#/600# Bright Polish, 8K Mirror Finish.
Precision Processing: Precision Laser Cutting (mitre cuts, hole drilling, slotting), deburring, custom bending, and customized labeling per tube.
Production Scale: 60,000+ Sqm state-of-the-art facility operating 20+ automated high-speed tube welding mills.
Massive Monthly Output: Over 8,000 tons of monthly capacity, with 3,000+ tons of common 304/316 tube sizes in ready stock for fast shipment loading.
Strategic Sourcing: Sourced exclusively from prime steel mill coils (TISCO, BAOSTEEL) ensuring predictable quality.
Eddy Current Testing: 100% online eddy current defect detection to eliminate any hidden weld flaws or micro-cracks.
PMI Verification: Rigorous hand-held spectrometer testing on every heat batch to guarantee correct Nickel, Chromium, and Molybdenum ratios.
Dimensional Accuracy: Digital caliper and micrometer audits at every stage from decoiling to bundling. Full EN 10204 3.1 MTC certificates provided.
Global Footprint: Trusted tube supplier to commercial construction projects and industrial stockists in over 50 countries.
Tariff Optimization: Professional processing of Certificate of Origin documents (Form E, RCEP, CO) to secure maximum tax exemptions for your customs check.
Logistics Delivery: Full operations for FOB China ports, CIF, DDU, and direct DDP delivery to your worksite.
Surface Protection: Each tube individually sleeved in plastic film or wrapped in woven bags to protect the polished surface.
Secure Bundling: Reinforced hexagonal bundling with heavy-duty steel bands and corner protectors to avoid transit deformation.
Timely Delivery: Standard sizes ship within 5–7 days; custom laser cut or processed tubing orders delivered in 14–18 days.
Q: Why choose ASTM A554 standard for square tubes?
A: ASTM A554 is the designated standard for structural and ornamental stainless steel tubing. It guarantees precise mechanical alignment, dimensional tolerances, and surface qualities superior to standard fluid pipes.
Q: Do you support custom hole laser cutting on square tubes?
A: Yes. Our multi-axis tube laser cutting machines can cut any complex slots, bolt holes, and angle cuts directly based on your CAD drawings.
Q: What is the typical MOQ for 316 stainless steel square tubes?
A: For standard in-stock sizes, the MOQ is 1 bundle (approx. 20–50 pieces depending on size). For custom rolling, it typically starts at 2–3 tons.
Wuxi Xinshanhu Steel Co., Ltd. is a Chinese stainless steel manufacturer existing for eleven years with rich production experience, well-trained workers and excellent engineers, Our factory has a mature production system with several steel production lines, including a high-precise acid continuous rolling line, a cold plate production line; a high-precise metal sheet flattening line; a high-precise metal sheet rewinding and tension straightening line; a metal sheet cutting and distribution line; High precision sheet rewinding and tension straightening lines; sheet cutting and assembly lines. Our products include various stainless steel plates, stainless steel tubes, stainless steel bars, stainless steel strips, stainless steel coils, stainless steel angles, stainless steel flat bars, stainless steel profiles, stainless steel wires, etc.
Our company’s processing center is located in Wuxi, Jiangsu, China. It is well equipped with kinds of machines, such as laser cutting machine, mirror polishing machine and so on. We can provide a wide range of personalized services according to the customers’needs.
Our main products are stainless steel plate/sheet, coil, round/square pipe, bar, channel, etc.
Mill Test Certification is supplied with shipment, Third Party Inspection is available.
We have many professionals, technical personnel, more competitive prices, and best after-sales service than other stainless steel companies.
Exported to more than 50 countries mainly from America, Russia, UK, Kuwait, Egypt, Turkey, Jordan, India, etc.
Skip the local fabrication delays by getting ready-to-weld square tubing directly from our factory:
Surface Finishes: Mill Finish (Industrial unpolished), Grit 180/240/320 Satin Brushed, Hairline, 400#/600# Bright Polish, 8K Mirror Finish.
Precision Processing: Precision Laser Cutting (mitre cuts, hole drilling, slotting), deburring, custom bending, and customized labeling per tube.
Production Scale: 60,000+ Sqm state-of-the-art facility operating 20+ automated high-speed tube welding mills.
Massive Monthly Output: Over 8,000 tons of monthly capacity, with 3,000+ tons of common 304/316 tube sizes in ready stock for fast shipment loading.
Strategic Sourcing: Sourced exclusively from prime steel mill coils (TISCO, BAOSTEEL) ensuring predictable quality.
Eddy Current Testing: 100% online eddy current defect detection to eliminate any hidden weld flaws or micro-cracks.
PMI Verification: Rigorous hand-held spectrometer testing on every heat batch to guarantee correct Nickel, Chromium, and Molybdenum ratios.
Dimensional Accuracy: Digital caliper and micrometer audits at every stage from decoiling to bundling. Full EN 10204 3.1 MTC certificates provided.
Global Footprint: Trusted tube supplier to commercial construction projects and industrial stockists in over 50 countries.
Tariff Optimization: Professional processing of Certificate of Origin documents (Form E, RCEP, CO) to secure maximum tax exemptions for your customs check.
Logistics Delivery: Full operations for FOB China ports, CIF, DDU, and direct DDP delivery to your worksite.
Surface Protection: Each tube individually sleeved in plastic film or wrapped in woven bags to protect the polished surface.
Secure Bundling: Reinforced hexagonal bundling with heavy-duty steel bands and corner protectors to avoid transit deformation.
Timely Delivery: Standard sizes ship within 5–7 days; custom laser cut or processed tubing orders delivered in 14–18 days.
Q: Why choose ASTM A554 standard for square tubes?
A: ASTM A554 is the designated standard for structural and ornamental stainless steel tubing. It guarantees precise mechanical alignment, dimensional tolerances, and surface qualities superior to standard fluid pipes.
Q: Do you support custom hole laser cutting on square tubes?
A: Yes. Our multi-axis tube laser cutting machines can cut any complex slots, bolt holes, and angle cuts directly based on your CAD drawings.
Q: What is the typical MOQ for 316 stainless steel square tubes?
A: For standard in-stock sizes, the MOQ is 1 bundle (approx. 20–50 pieces depending on size). For custom rolling, it typically starts at 2–3 tons.
Wuxi Xinshanhu Steel Co., Ltd. is a Chinese stainless steel manufacturer existing for eleven years with rich production experience, well-trained workers and excellent engineers, Our factory has a mature production system with several steel production lines, including a high-precise acid continuous rolling line, a cold plate production line; a high-precise metal sheet flattening line; a high-precise metal sheet rewinding and tension straightening line; a metal sheet cutting and distribution line; High precision sheet rewinding and tension straightening lines; sheet cutting and assembly lines. Our products include various stainless steel plates, stainless steel tubes, stainless steel bars, stainless steel strips, stainless steel coils, stainless steel angles, stainless steel flat bars, stainless steel profiles, stainless steel wires, etc.
Our company’s processing center is located in Wuxi, Jiangsu, China. It is well equipped with kinds of machines, such as laser cutting machine, mirror polishing machine and so on. We can provide a wide range of personalized services according to the customers’needs.
Our main products are stainless steel plate/sheet, coil, round/square pipe, bar, channel, etc.
Mill Test Certification is supplied with shipment, Third Party Inspection is available.
We have many professionals, technical personnel, more competitive prices, and best after-sales service than other stainless steel companies.
Exported to more than 50 countries mainly from America, Russia, UK, Kuwait, Egypt, Turkey, Jordan, India, etc.
sales@xshsteel.com
+8615961815651
