Product description:

Square and rectangular sectioned steel pipes are collectively referred to as square and rectangular sectioned steel pipes, and they belong to a type of welded steel pipes. They are also known as "steel cold-formed sections".

Due to their unique cross-sectional shape and excellent mechanical properties, square and rectangular sectioned steel pipes are widely used in modern industries, construction and manufacturing, and have become an indispensable basic steel material.

Small-angled square and rectangular tubes are precision-engineered hollow steel sections designed with smooth, slightly rounded corners (also known as small-radius corners or small-angle edges). These tubes combine the strength and rigidity of traditional hollow sections with enhanced aesthetics, better formability, and improved safety. They are widely used in construction, machinery manufacturing, transportation equipment, furniture design, and architectural decoration, offering both functional performance and modern appearance.

Small-angled tubes are typically manufactured by hot-rolled, cold-formed, or cold-drawn processes using high-quality carbon steel, alloy steel, or stainless steel. Their small-radius corner design reduces stress concentration, improves bending strength, and facilitates easier fabrication compared to sharp-cornered tubes.

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Manufacturing Process

The production of small-angled Square and rectangular tubes involves several controlled steps to ensure accuracy and strength:

Material Selection: High-quality steel coils or seamless billets (S235, S355, E355, 20#, 45#, 304, 316L, etc.) are selected for processing.

Forming: The material is formed through cold bending or hot rolling into square or rectangular shapes with precise radius corners.

Welding (if applicable): For welded versions, high-frequency electric resistance welding (ERW) or submerged arc welding (SAW) is applied to ensure strong, smooth seams.

Cold Drawing or Sizing: To achieve small corner radii, tubes are cold-drawn through precision dies, ensuring tight tolerances and uniform wall thickness.

Heat Treatment: Normalizing or annealing enhances the tube’s mechanical properties and structural stability.

Finishing and Inspection: Tubes are straightened, cut, and inspected using ultrasonic or eddy current testing to guarantee internal soundness and surface quality.

The resulting tubes exhibit excellent dimensional accuracy, smooth surfaces, and consistent corner radii, making them ideal for high-precision and aesthetic applications.

Material Grades

Small-angled square and rectangular tubes are available in various steel grades to suit different performance needs:

Carbon Steel: S235JR, S275JR, S355JR, Q195, Q235, Q345

Alloy Steel: 20MnV6, 40Cr, 42CrMo4, 15CrMo

Stainless Steel: 304, 316L, 321, 201, 310S

Each grade provides unique advantages in terms of tensile strength, weldability, corrosion resistance, and formability.

Advantages of Small-Angled Square and Rectangular Tubes

Smooth Corners for Better Formability: Rounded edges reduce stress concentration during bending or fabrication.

Improved Aesthetics: Soft corner transitions give a sleek, modern appearance ideal for architectural and decorative use.

Enhanced Safety: Smooth edges minimize risk of injury during handling and installation.

High Dimensional Accuracy: Cold-drawn or precision-formed production ensures consistent geometry.

Excellent Weldability and Machinability: Compatible with standard welding, cutting, and coating techniques.

Optimized Strength-to-Weight Ratio: Ideal for lightweight structural applications requiring rigidity and durability.

Corrosion Resistance: Available with galvanized, pickled, or stainless steel options for long-term use.

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Applications:

Small-angled square and rectangular tubes are used across multiple industries:

Construction and Architecture: Building frameworks, curtain walls, handrails, and decorative structures.

Mechanical Engineering: Equipment supports, machine frames, and precision assemblies.

Automotive and Transport: Chassis components, roll cages, and load-bearing structures.

Furniture and Interior Design: Modern furniture frames, shelving, and industrial décor.

Energy and Infrastructure: Solar panel supports, piping frameworks, and lightweight trusses.

Their refined design and robust performance make them a preferred choice for both industrial and aesthetic applications.

Company profile:

Since its establishment in 2014, Wuxi Hengxin Zhicheng Co., Ltd. has rapidly grown into a leading enterprise in the steel manufacturing industry. We focus on the research, production and sales of seamless steel pipes, special-shaped steel pipes and hydraulic cylinders, and are committed to providing customers with high-quality, customizable products that fully meet diverse application needs.

Our products are exported to global markets such as the Middle East, South America, Africa, and Southeast Asia, and are highly trusted by large purchasers and customers in the steel industry. We always prioritize quality, reliability and customer service, and attach great importance to establishing long-term and stable cooperative relationships with customers. We provide each customer with tailor-made solutions.

We continuously promote technological innovation and improve service capabilities and production efficiency. Through an efficient online platform, you can browse our best-selling products at any time and communicate with the sales and support teams in real time to conveniently obtain the information you need. We sincerely invite partners from all countries to visit, exchange and provide guidance, and jointly explore more possible cooperation opportunities!

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Packaging and Transportation:

【Package standard】

We use steel bands to tightly package the products into hexagonal bundles. The structure is stable and not prone to deformation. Each bundle is equipped with two high-strength nylon straps to ensure the safety and convenience of the lifting operation.

To meet various maritime transportation needs, we offer a range of customized packaging options, including full coverage with oilcloth, moisture-proof wooden boxes, and high-strength protective frame packaging, to ensure the maximum safety of goods during transportation.

【Guarantee for transportation】

We offer 20-foot and 40-foot standard container transportation services. Each container can carry up to 25 tons of goods and we can accept trial orders with a minimum of 5 tons. This allows for flexible adaptation to your purchasing scale. All packaging complies with maritime shipping standards to ensure that the goods are delivered to the destination efficiently and safely.

Why us?

We focus on the research, development, production and sales of seamless steel pipes, special-shaped steel pipes and hydraulic cylinders. We have a complete production chain and an advanced equipment system, including piercing machines, cold drawing machines, hot rolling machines, high-precision flaw detection and testing equipment. The company has passed multiple authoritative certifications such as ISO9001, API, SGS, CCS, DNV, ABS, CE, RoHS, etc., ensuring that each product complies with international standards. We are committed to providing customers with high-quality, customizable solutions to meet diverse application needs.

Relying on our own built processing base and modern workshops, combined with multiple branches and storage centers across the country, we have achieved sufficient inventory and efficient logistics coordination, significantly shortening the delivery cycle and ensuring the rapid delivery of orders.

We have established a complete service and support system. After the order is signed, the professional after-sales team can provide timely and safe on-site guidance and technical support to ensure that customers are at ease throughout the process from procurement to use.

FAQ：

1. Do you support customized design and production?

Sure. We have a professional engineering team that can conduct customized design and production with special sizes, control systems or OEM according to your requirements.

2. How fast can you deliver?

In stock sizes, it takes 3-5 days. For customized sizes, it takes 30-35 days.

3. What payment methods do you support?

We support TT payment. Generally, 30% to 50% of the payment is made in advance, and the remaining amount is paid before shipment.

4. Can you provide material certification (MTC)?

Yes, we will provide MTC to you after production is completed to ensure that the material quality meets the standards.

5. What is the minimum order quantity?

Generally, we accept trial orders. The minimum order quantity is 1-3 tons, which can be determined according to different products.