Product Overview
Cold Formed Square Steel Tube is manufactured by cold forming carbon steel or alloy steel strips into square sections with accurate dimensions and consistent mechanical performance. It is widely used for structural frames, construction supports, machinery structures, and industrial fabrication applications.
Product Specifications
|
Product Name |
Cold formed structural square steel pipe |
|
Material |
Carbon Steel / Alloy Steel |
|
Size Range |
10×10mm – 200×200mm |
|
Wall Thickness |
0.75mm – 6.0mm |
|
Length |
6 m standard or customized |
|
Surface |
Black / Oiled / Coated |
|
Standard |
ASTM / EN / JIS |
|
Manufacturer |
Wuxi Chengxingchuang Metal Products Co., Ltd |
Key Product Features
Produced via precision cold-forming mills, maintaining outer dimension tolerances within ±0.5 mm and squareness of 90° ± 0.5° to eliminate on-site installation misalignment.
Cold working induces strain hardening at the corners, increasing yield strength consistency and allowing engineers to reduce overall structural dead load safely.
Online eddy-current testing compliant with ASTM/EN protocols ensures high weld integrity and structural soundness under demanding load conditions.
Multiple Surface Options for Different Environments
|
Surface |
Application |
|
Black Surface |
General indoor structural fabrication and framing |
|
Oiled Surface |
Temporary corrosion protection during long-distance maritime storage and transport |
|
Coated Surface |
Outdoor exposure, solar mounting structures, or corrosion-resistant applications |
Value-Added Fabrication Services
Precision Cutting: Exact length cutting with high-speed band saws (Tolerance: ±2 mm).
Hole Punching & Drilling: Custom hole patterns for bolt-ready assembly, saving on-site labor time.
Welding & Assembly: Pre-welded base plates or custom brackets tailored to project drawings.
Galvanizing (HDG): Hot-dip galvanizing services available for ultimate outdoor corrosion resistance.
Why Choose Cold Formed Over Hot Finished Tubes
|
Feature |
Cold Formed Square Tube (Our Product) |
Hot Finished Square Tube |
|
Corner Yield Strength |
Higher (due to strain hardening) |
Standard |
|
Dimensional Tolerances |
Extremely precise and tight |
Looser tolerances |
|
Surface Finish |
Smooth, ideal for painting/coating |
Scaly, rougher surface |
|
Cost Efficiency |
Highly cost-effective for most structures |
Typically more expensive |
Manufacturing & Quality Assurance
Raw Material Verification: Incoming steel coils undergo rigorous chemical composition and physical property inspections.
In-Line Quality Testing: Continuous eddy current testing (ECT) is combined with ultrasonic evaluations to verify weld seam soundness and structural continuity.
Finished Product Inspection: Every batch undergoes dimensional checks, flattening tests, and tensile testing. Full traceability is maintained from raw coil to final packing, supported by ISO 9001 quality management standards and verifiable Mill Test Certificates (MTC).
Packaging & Logistics
Professional Packaging: Securely bundled with heavy-duty steel strips and wrapped in moisture-resistant waterproof plastic film to prevent transit corrosion. Special wooden crates or pallets are available upon request.
Optimized Logistics: We support flexible loading in 20GP or 40GP containers, carefully engineering space utilization to minimize freight costs for global wholesalers and project contractors.
FAQ
Q: What is your Minimum Order Quantity (MOQ) and do you accept mixed size containers?
A: Our standard MOQ is 3 metric tons per size, but we fully support mixed size loading in a single 20GP or 40GP container to help overseas wholesalers manage initial inventory and optimize shipping costs.
Q: Can you provide third-party inspection (such as SGS or BV) before shipment?
A: Yes. We fully cooperate with internationally recognized third-party inspection agencies appointed by the buyer. Inspection reports and loading photos are provided prior to final balance payment.
Q: What are your standard payment terms for international orders?
A: We typically accept T/T (30% deposit with balance against copy of B/L) and L/C at sight for stable, long-term wholesale partnerships.
Q: How do you handle anti-dumping or customs clearance support documentation?
A: We provide fully compliant origin documentation, including Certificate of Origin (Form A, Form E, or CO), commercial invoices, packing lists, and detailed mill test certificates to ensure smooth customs clearance in destination ports.
Q: What is the typical lead time for production and shipping?
A: For standard sizes available in stock, shipment can be arranged within 7 to 10 days. For custom production runs, the standard manufacturing lead time is 20 to 25 days depending on the total tonnage.
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