Specializing in the production of various stainless steel pipes, plates, coils, rods, pipe fittings, high nickel alloy steel products, high temperature resistant products
PRODUCTS
Seamless Square Tube
Category:
Seamless Steel Pipe
keywords :
Seamless Steel Pipe
Product Description
Seamless square tube is a hollow structural steel profile with a square cross-section, made from seamless round pipes via precision cold drawing, cold forming or hot extrusion. It has no welded seams, uniform wall thickness, high dimensional accuracy and excellent mechanical performance, with good bending, torsion and compression resistance. Available in carbon steel, alloy steel and stainless steel, it is widely used in construction, machinery manufacturing, automotive and engineering fields, and we support customized sizes and surface treatments to meet specific needs.
Parameter
|
Product name |
Seamless square steel pipe |
|
Standard |
AISI,ASTM,DIN,JIS,GB ,JIS,SUS,EN,etc |
|
Steel Grade |
API 5L、ASTM A213、A312、ASTM A269、ASTM A778、ASTM A789、 DIN 17456、ASTM A106、ASTM A53、ASTM A36、DIN 17457、DIN 17459 JIS G3459、JISG3463、GOS T9941、EN 10216、BS3605、GB13296 10#、20#、45#、Q235、Q345、Q195、Q215、Q345A、Q345B GR.B A135、P265TR1、P265TR2、STPT480、A106、GR.C, A210C ST35.8、ST45.8、ST52, ST37, ST37-2, DIN 1629 ST35, ST45, DIN 17175 ST35.8, DIN 17175 19Mn5 |
|
Wall Thickness |
1-20mm |
|
Length |
1-12m |
|
Type |
Hot-rolled /Cold-rolled /Cold-drawing |
|
Inspection |
With hydraulic testing, eddy current, infrared test |
|
Surface |
Black painted, PE/PVC/PP coated, Galvanized, color coated, anti rust varnished,anti rust oiled, checkered, epoxy coating, etc. |
|
Application |
Seamless pipes are widely used in petroleum、chemical、medical、food、light industry、machinery、instrument and other industrial pipeline and mechanical structure parts and etc. |
Application description:
Widely applied in various fields due to its reliable performance: it is used in construction for structural frameworks, beams and columns; in machinery manufacturing for equipment frames and components; in automotive industry for chassis parts and support structures; and in engineering machinery, hydraulic systems, power facilities and logistics equipment that require high load-bearing capacity and stability, perfectly adapting to both indoor and outdoor working environments.
Production description
Solid square billet is heated, pierced, and hot rolled into a seamless hollow shell. The round shell is then cold drawn through a square die or passed through square-shaped rolls with a mandrel to form a square profile. Multiple cold drawing passes with intermediate annealing ensure precise outer dimensions, uniform wall thickness, and good corner radius. The final tube is straightened, cut to length, and inspected.
Shipping Packaging
For export, seamless square tubes are bundled with plastic end caps, wrapped in VCI paper and moisture-proof polyethylene, packed in wooden crates or on ISPM-15 pallets, secured with steel straps, and fitted with edge protectors. Labels include grade, dimensions, length, quantity, and heat number for safe sea freight.
Why Choose Us?
1.Factory Strength:Direct manufacturer with piercing mills, hot rolling lines, and precision cold drawing equipment for seamless square tubes, ensuring uniform wall thickness, tight corner radius, and consistent mechanical properties.
2.Quality Assurance:Strict control of dimensional tolerances (outer dimension ±0.5mm, wall thickness ±0.1mm), straightness, and surface finish; 100% eddy current or ultrasonic testing; compliant with ASTM A519, EN 10210-2, JIS G3445, GB/T 8162.
3.Certifications & Reports:Mill test certificates (MTC) with each shipment; third-party inspections (SGS, BV) and PMI test reports available upon request.
4.Customization & Service:Wide grade range (carbon steel, alloy steel, stainless steel), sizes from 20×20mm to 500×500mm, wall thickness 1.5–30.0mm, custom lengths, corner radii, and heat treatment (annealed, normalized) with fast lead times.
5. Export Packaging:Plastic end caps + VCI paper + moisture-proof wrapping + wooden crates/ISPM-15 pallets + steel strapping + edge protectors for safe sea freight and damage-free delivery.
FAQ
1. What size range can you produce for seamless square tubes?
Outer dimension: 20×20mm up to 500×500mm. Wall thickness: 1.5mm to 30.0mm. Length: up to 12m or custom. Corner radius can be tailored.
2. How do seamless square tubes compare to welded square tubes?
Seamless tubes have no weld seam, offering higher pressure resistance, uniform structure, and better performance in high-temperature or critical applications. Welded tubes are more cost-effective for general structural use.
3. Can seamless square tubes be supplied with heat treatment?
Yes. We offer annealed, normalized, or quenched & tempered conditions to meet your required hardness, strength, and ductility for forming or load-bearing applications.
Customer Reviews
FACTORY APPEARANCE
HONORS AND QUALIFICATIONS
The company has sufficient inventory and complete varieties and specifications. Special materials and specifications are produced according to customer requirements and exported to Asia, the Middle East, Europe and other countries and regions. We have our own quality management systems: ISO9001, ISO14000, OHSAS18001 standards.
CUSTOMER VISIT
GET A FREE QUOTE
We understand that our customers value quality and after-sales service most. We consistently adhere to high standards and strict requirements, striving to become your preferred partner.
RELATED PRODUCTS
Get ln Touch Now
Need Assistance? We're Here To Help!
Telephones
Contact Address
Building 1, Wealth No.1 Plaza, Huaiyin District, Jinan City, Shandong Province, China
If you have any questions or need help, please feel free to contact us.
Enter your information and our team will reach out to you shortly.
Copyright : © NUCOR STEEL (SHANDONG) CO., LTD.
