Large Gauge Black Rectangular Tube

For industrial, commercial, and architectural applications demanding exceptional strength, rigidity, and a clean aesthetic, large rectangular tubing is a cornerstone material. Our Large Diameter Black Rectangular Tube provides a robust solution for structural frameworks, heavy machinery, and large-scale fabrications. When your project calls for substantial material with high load-bearing capacity, our Big Bore Black Rectangular Pipe offers the internal volume and structural integrity needed for demanding environments. We also supply Oversized Black Rectangular Tube for custom applications where standard sizes fall short, enabling unique designs and specialized construction. Engineered for performance, our Large Size Black Rectangular Hollow Section combines efficient material use with superior resistance to bending and torsion, making it ideal for columns, braces, and support systems in both interior and exterior settings.

The Large Gauge Black Rectangular Tube is manufactured from high-quality steel, formed through a precise production process to ensure dimensional accuracy and consistency. The distinctive black finish, typically a mill scale or a painted coating, provides a degree of corrosion resistance and a uniform, professional appearance suitable for projects where the structural element may remain exposed. This product’s rectangular geometry offers a flat surface area that facilitates easier connection and welding compared to round tubing, simplifying assembly in frameworks, gates, and industrial equipment. The inherent design of the Large Gauge Black Rectangular Tube provides excellent strength-to-weight ratios, allowing for the creation of sturdy structures without excessive material weight, which can be a critical factor in transportation and installation costs.

Large Gauge Black Rectangular Tube: Standard Specifications & Dimensions

Our product range is available in various grades and wall thicknesses to meet diverse project requirements. Below is a detailed overview of common specifications.

Material: ASTM A500 Grade B Steel, A513
Finish: Black Mill Scale (Hot Rolled) or Black Painted (Cold Rolled)
Tolerance: Complies with ASTM A500 standards for structural tubing.
Common Applications: Structural supports, machine bases, frames, trailers, agricultural equipment, architectural features, and industrial racks.

Nominal Size (inches) H x W	Wall Thickness (inches)	Weight per Foot (lbs)	Theoretical Outer Dimensions (inches)
8 x 4	0.250	20.85	8.000 x 4.000
8 x 6	0.312	30.05	8.000 x 6.000
10 x 4	0.250	23.70	10.000 x 4.000
10 x 5	0.375	39.95	10.000 x 5.000
12 x 6	0.312	38.40	12.000 x 6.000
12 x 8	0.375	54.57	12.000 x 8.000

Note: The table above represents a sample of available sizes. Custom sizes and gauges can be sourced upon request. Weights are approximate and based on theoretical calculations for steel.

Key Mechanical Properties

The performance of Large Gauge Black Rectangular Tube is defined by its mechanical properties, which are guaranteed through standardized testing.

Property	ASTM A500 Grade B Typical Value	Test Method
Tensile Strength (min)	58,000 psi	ASTM A370
Yield Strength (min)	42,000 psi	ASTM A370
Elongation (min in 2")	23%	ASTM A370

Hot Products

Small Diameter Galvanized Oval Tube
In the field of architectural decoration, Xinlida’s China Small Diameter Galvanized Oval Tube has a unique performance.Its small and flexible, unique oval section is beautiful and generous, often used to make exquisite railings, handrails, etc., adding elegant temperament to the building and becoming a beautiful landscape in the building.
Hot-Dip Galvanized Angle Steel
Tianjin Xinlida Steel Pipe Co., Ltd. is a leading manufacturer specializing in steel structure profiles. Leveraging its intelligent production base with an annual capacity of 50 million tons and a comprehensive business system integrating domestic production, overseas bases, and global trade, the company provides engineering support services across multiple sectors including construction, energy, and transportation. Its products are exported to Southeast Asia, the Middle East, and other overseas markets, meeting the procurement needs of various large-scale domestic and international projects. Holding formal import and export qualifications, the company adheres to international production standards throughout the entire process, from raw material selection to finished product quality control. With stable product quality and efficient supply services, it has earned the long-term trust of domestic and international buyers, making it a reliable supplier of steel structure materials for engineering projects.
Small-diameter hot-rolled seamless steel pipe
In the fields of precision machinery manufacturing and fluid transmission, small-diameter hot-rolled seamless steel pipes, with their dimensional accuracy and performance stability, have become key components supporting the operation of high-end equipment. Tianjin Xinlida Steel Pipe Co., Ltd., relying on its intelligent production system and global layout, provides small-diameter steel pipes that meet international standards for industries such as construction, energy, and transportation. Its products cover a diameter range of 20mm to 219mm, with wall thickness accuracy controlled within ±0.1mm.
Cold-rolled seamless steel pipes for construction machinery
In the field of construction machinery, steel pipes, as a key basic material, directly affect the stability and safety of projects due to their performance and quality. Tianjin Xinlida Steel Pipe Co., Ltd. has deep expertise in its core steel pipe business and has made significant achievements in the research and development and production of steel pipes for construction machinery. Its Cold-rolled seamless steel pipes for construction machinery , with their excellent properties, have become the ideal choice for numerous engineering projects.
Galvanized U-channel
Tianjin Xinlida Steel Pipe Co., Ltd. has long specialized in the manufacturing of steel pipes and structural steel, establishing a comprehensive business ecosystem that integrates domestic production, overseas bases, and global trade. Our galvanized U-channels offer a core competitive advantage by combining long-lasting corrosion resistance—achieved through hot-dip galvanizing that meets national standards—with a high-strength, one-piece formed structure. This solution effectively addresses four major industry pain points: structural corrosion, insufficient load-bearing capacity, lengthy construction periods, and high maintenance costs—challenges often encountered in coastal saline-alkali areas, humid mountainous regions, and environments subject to rain, snow, and low temperatures. We operate our own intelligent production facilities with substantial annual capacity and a full suite of advanced structural steel processing equipment. Adhering to the GB/T13912 galvanizing standard, we manufacture all U-channels using Q235B and Q355B grade steel, while offering services such as custom specifications, precision cutting, and prefabricated processing. Clients—whether for domestic projects or overseas trade—benefit from rapid production scheduling and flexible order adjustments; profile specifications and order quantities can be modified during production to meet project timelines and minimize inventory waste.
High-pressure cold-rolled seamless steel pipe
High-pressure cold-rolled seamless steel pipes are tubular products formed through a cold-rolling process. The pipe body has no weld seams and is specifically designed for use in high-pressure environments. Cold rolling allows for higher dimensional accuracy, more uniform wall thickness, and better surface quality compared to hot-rolled products. The absence of weld seams is crucial; any defects under high pressure can lead to leaks or even bursts, and the seamless structure significantly reduces this risk.

Related Blog
Reviews

Cold-Rolled Seamless Steel Pipe: Why Is It the Preferred Choice for High-Precision Industrial Applications
Cold-Rolled Seamless Steel Pipe is widely used in industries that demand high dimensional accuracy, smooth surface quality, and excellent mechanical properties. Compared with hot-rolled pipes, cold-rolled seamless pipes offer tighter tolerances and superior performance for applications such as hydraulic systems, automotive components, precision machinery, and energy equipment.
What Is a Straight Seam Welded Steel Pipe and Why Is It Widely Used in Modern Infrastructure
A straight seam welded steel pipe is one of the most commonly used steel pipe products in global infrastructure, energy transmission, and construction projects. Known for its uniform weld seam, stable performance, and cost efficiency, this type of pipe plays a critical role in oil and gas pipelines, water supply systems, structural engineering, and industrial manufacturing.
What Are the Benefits and Applications of Black Striped Rectangular Tubes
Black striped rectangular tubes are gaining popularity across various industries due to their aesthetic appeal, durability, and structural integrity. This blog post will delve into the significance of black striped rectangular tubes, their advantages, uses, and how to choose the right supplier. We will also answer common questions and provide detailed insights into their construction and applications.
The differences between cold-rolled seamless steel pipes and hot-rolled seamless steel pipes
How Does Thin-Wall Spiral Welded Pipe Reduce Cost Without Sacrificing Strength
Thin-wall spiral welded pipe has emerged as a cost-efficient and structurally reliable solution for modern pipeline systems. By optimizing wall thickness while maintaining mechanical integrity, this type of steel pipe offers significant material savings, improved manufacturing efficiency, and excellent performance in water, oil, gas, and infrastructure projects.
Why Are Spirally Welded Steel Pipes Widely Used in Oil, Gas, and Water Transmission
Spirally welded steel pipes have become a cornerstone material in modern infrastructure projects, especially in oil, gas, water transmission, and large-scale construction. Their unique spiral welding process enables superior strength distribution, flexible diameter production, and cost efficiency. This in-depth guide explores what spirally welded steel pipes are, how they are manufactured, their technical advantages, standards, applications, and how to select the right product for your project.

Large Gauge Black Rectangular Tube