Annealed Sq / Rect Tube

Annealed Square & Rectangular Tube | Highly Formable Steel

Annealed Square and Rectangular Tubes are carbon or alloy steel tubes that have undergone the annealing process to relieve internal stresses, improve ductility, and enhance workability. Through controlled heating and cooling, the steel achieves a uniform microstructure, resulting in reduced hardness, increased flexibility, and improved machinability. This makes annealed tubes ideal for applications where bending, forming, or fabrication is required.

These tubes are extensively used in construction, automotive, manufacturing, furniture, and machinery industries. In construction, annealed square and rectangular tubes are used for frameworks, handrails, supports, and decorative structures, offering ease of shaping without compromising structural integrity. In the automotive and manufacturing sectors, these tubes are utilized for chassis components, machine frames, and equipment housings that require precise dimensions and uniform mechanical properties.

The annealing process ensures that the tubes can withstand forming, welding, and bending operations with minimal risk of cracking or deformation. Their smooth surfaces, dimensional consistency, and enhanced ductility make them suitable for architectural projects, furniture production, and industrial fabrication, where both aesthetics and performance are critical.

product details

Key Features

Enhanced Ductility
Annealed tubes are softer and easier to bend or form without cracking.

Uniform Mechanical Properties
Controlled annealing ensures consistent hardness, strength, and flexibility.

Excellent Workability
Ideal for welding, bending, forming, and other fabrication processes.

Dimensional Accuracy
Maintains precise dimensions and smooth surfaces for industrial and decorative use.

Versatile Applications
Suitable for construction, automotive, furniture, machinery, and industrial fabrication.

Technical Specifications

Product	Annealed Square / Rectangular Tube
Material	Carbon Steel
Steel Grades	Gr.B, Gr.C / S235 / Q235, Q355, etc.
Surface Finish	Annealed, Black, Oiled
Standards	ASTM A500 / EN 10219 / GB/T 6728, etc.

Available Sizes

Below is an overview of our regular production sizes for your reference. Customized dimensions and special standards are also available :

NOMINAL O.D	THICKNESS	NOMINAL O.D	THICKNESS	NOMINAL O.D	THICKNESS	LENGTH
mm	mm	mm	mm	mm	mm	m
12x12	0.4-1.2	48x48	0.4-1.5	20x35	0.4-1.5	0.1-12
13x13	0.4-1.2	50x50	0.4-1.5	20x40	0.4-1.5
14x14	0.4-1.2	58x58	0.4-1.5	24x38	0.4-1.5
15x15	0.4-1.2	60x60	0.4-1.5	25x38	0.4-1.5
16x16	0.4-1.5	70x70	0.4-1.5	25x40	0.4-1.5
18x18	0.4-1.5	73x73	0.4-1.5	25x70	0.4-1.5
19x19	0.4-1.5	75x75	0.4-1.5	25x75	0.4-1.5
20x20	0.4-1.5	80x80	0.4-1.5	25x100	0.4-1.5
22x22	0.4-1.5	8x16	0.4-1.5	30x40	0.4-1.5
23x23	0.4-1.5	8x18	0.4-1.5	30x50	0.4-1.5
24x24	0.4-1.5	8x31	0.4-1.5	30x70	0.4-1.5
25x25	0.4-1.5	9x20	0.4-1.5	35x78	0.4-1.5
29x29	0.4-1.5	10x18	0.4-1.5	38x75	0.4-1.5
30x30	0.4-1.5	10x20	0.4-1.5	40x50	0.4-1.5
32x32	0.4-1.5	10x30	0.4-1.5	40x60	0.4-1.5
35x35	0.4-1.5	10x50	0.4-1.5	40x80	0.4-1.5
37x37	0.4-1.5	15x30	0.4-1.5	50x75	0.4-1.5
38x38	0.4-1.5	15x60	0.4-1.5	60x80	0.4-1.5
40x40	0.4-1.5	19x38	0.4-1.5	50x100	0.8-1.5
45x45	0.4-1.5	20x30	0.4-1.5	50x150	0.8-1.5
If you require other sizes, wall thicknesses, or specific material grades not listed above, please contact us directly for tailored solutions.

Applications

Construction & Architectural Projects
Used for frames, supports, scaffolding, and decorative structures. Their enhanced formability allows easy shaping during installation while maintaining reliable structural performance.

Automotive & Machinery Manufacturing
Applied in chassis frames, equipment housings, and custom-fabricated components where uniform mechanical properties and stable performance are essential.

Furniture & Interior Fabrication
Favored for bending and forming into precise shapes, making them ideal for furniture frames and interior structures that require both visual appeal and mechanical strength.

Industrial Fabrication & Custom Engineering
Suitable for projects requiring cutting, welding, shaping, or other fabrication processes, offering excellent workability and consistent material behavior.

Infrastructure & General Engineering
Used in various support structures, light frameworks, and installation systems, providing dependable performance with easy processing in demanding environments.

Product Inspection

Our steel products undergo comprehensive inspection before delivery to ensure quality and compliance with international standards. Inspections include dimensional measurements such as length, diameter, wall thickness, and width, as well as surface quality and overall appearance. Mechanical properties and chemical composition can also be tested according to customer requirements.