Cold Drawn Seamless Square Hollow Section Steel Tube
Precision-Manufactured Square Section Pipes for Structural & Hydraulic Applications
Model: CX-06
Brand: CHENGXIN
HS Code: 73049000
Size Range: 70mm × 70mm – 250mm × 250mm (Wall thickness up to 35mm)
Product Overview
CHENGXIN Cold Drawn Seamless Square Hollow Section is a high-precision square steel tube manufactured from high-quality hot rolled seamless steel pipes and shaped by hydraulic cold drawing. Compared with welded square hollow sections, our cold drawn square tube offers seamless structure, better mechanical strength, tighter tolerance, and a smoother surface—making it an ideal solution for high-demand applications such as hydraulic systems, mechanical frames, and precision structures.
This product is widely known as:
Square Hollow Pipe
Square Hollow Section (SHS)
Steel Square Tube
Cold Drawn Square Tube
Seamless Square Steel Pipe
Technical Specifications
Product Name: Cold Drawn Seamless Square Hollow Section Steel Tube
Applicable Standards & Steel Grades:
ASTM A519: SAE 1020, 1026, 1045, 1518, 4130, 4140, etc.
DIN 2391-2: ST35, ST45, ST52
EN 10305-1: E195, E235, E355, C35E, C45E, 25CrMo4, 42CrMo4
EN 10305-4: E215, E235, E355
GB/T 3639: 10#, 20#, 45#, Q345B, 27SiMn, etc.
Size Range:
Side: 70mm × 70mm – 250mm × 250mm
Wall Thickness: up to 35mm
Custom dimensions available upon request
Manufacturing Method: Hydraulic cold drawing, seamless forming without welding
Delivery Conditions:
BKW +LC: Cold drawn, light finishing
BKS +SR: Stress relieved
GBK +A: Annealed
NBK +N: Normalized
End Finishing: Plain ends with square cuts, bevelled ends available, free of burrs and welding seams
Surface Treatment: Internal & external oil coating, optional anti-rust paint, polished surface for critical applications
Marking & Packaging: Standard marking includes size, grade, heat number, and CHENGXIN brand; packed in bundles tied with steel strips, plastic caps for end protection, wrapped with PVC or knit bags, wooden crates available upon request
Product Features & Benefits
Seamless Structure: No welding lines, superior mechanical integrity for structural and fluid systems.
High Dimensional Accuracy: Ideal for applications with tight tolerance requirements.
Excellent Surface Finish: Reduces friction and enhances performance in hydraulic or moving systems.
Versatile Steel Grades: Supports both carbon and alloy steel for flexible usage across industries.
Superior Twist & Straightness Control: Maintains alignment under stress in construction and automation settings.
Applications
Steel structure & construction frameworks
Hydraulic cylinder components
Mechanical parts and equipment frames
Automotive manufacturing
Agricultural & mining machinery
Furniture and sports equipment
Thanks to the seamless finish, they are especially suitable for load-bearing structures and movement mechanisms.
Why Choose CHENGXIN Square Hollow Steel Tubes?
China-based Factory: Over 20 years of tube manufacturing experience
Strict Quality Control: Full inspection from raw material to final tube delivery
Global Export: Supplying welded & seamless square tubes to 50+ countries worldwide
Flexible Customization: OEM/ODM orders available based on your drawing, grade, or tolerance request
FAQ
Q1: Are you a factory or trading company?
A: We are a direct manufacturer located in Changzhou, China, with 12 standard workshops and complete in-house production lines.
Q2: Can you produce square tube sections with customized sizes?
A: Yes. Our cold drawn square hollow sections can be produced in both standard and non-standard sizes.
Q3: What is your MOQ?
A: 5 tons per size, depending on the grade and size.
Q4: What is your lead time?
A: Normally 30–45 days. For urgent orders, we can prioritize production.
Q5: Do you provide quality certificates and inspection?
A: Yes, we provide material certificates, dimensional reports, and third-party inspection support.
Company Profile
CHANGZHOU CHENGXIN PRECISION STEEL TUBE CO., LTD. is a certified manufacturer of cold drawn, cold rolled, and welded steel tubes since 2002. Our 32,000㎡ production base is equipped with 2 hydraulic cold drawing benches, 4 chain drawing benches, 2 ERW welding mills, and full in-house testing & machining capabilities. We supply precision tubes globally and support OEM/ODM projects for square hollow pipes, round mechanical tubing, and custom steel sections.
Looking for a reliable supplier of seamless square hollow section steel tubes? Contact us now for technical specifications, price quotes, and lead time details.
