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Alloy Steel Square Pipe

Alloy steel square pipe is a pipe made of alloy steel material. Its manufacturing process includes forming, welding, and sometimes seamless extrusion. There are various alloying elements in alloy steel, such as chromium, nickel, molybdenum or vanadium, which enhance strength, corrosion resistance, heat resistance and wear resistance. At the same time, the unique mechanical and physical properties of alloy steel square tubes are added.

Gnee has the widest range of square tubes available in stock. Here are a variety of lengths, widths, and thicknesses to choose from. In addition, we provide test certificates and processing services. We have our own factory and can supply steel pipes in large quantities at factory prices. We are a steel pipe manufacturer and exporter with more than 15 years of experience and strong comprehensive strength.

Gnee has a large inventory of alloy steel square tubes, which allows to meet customers’ needs and deliver products on time. This avoids delays in project progress due to shortages. Our inventory management system is highly precise, ensuring inventory accuracy and real-time updates. Whether it is mass production or individual customized needs, Gnee can provide quick responses, which brings convenience and confidence to customers.

7 days for stock goods/ within 30-50 days / depending on your order quantity

Clear labels are tagged on the outside of the package for easy identification of the quantity and product I.D.

  • Bundles
  • Wooden Boxes
  • Crates
  • Packaging as customer’s requirements

Available, welcome to consult


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General Parameters Of Alloy Steel Square Pipe

ProductAlloy Steel Square Pipe
Sizes10mm x 10mm to 500mm x 500mm or as the customer’s request
Wall Thickness1mm to 40mm or as the customer’s request
Length2.0m~12m or as the customer’s request
StandardASTM A335, ASTM A213, ASTM A519
CertificatesISO 9001 / ISO 18001 / ISO 14001 / CE
Surface ProtectionBlack (Self Coloured uncoated), Varnish/Oil Coating, Pre-Galvanized, Hot Dip Galvanized
Monthly Output20 million-30 million pieces per month
Applicationsconstruction of buildings, bridges, machine components, heat exchangers, etc.

What applications can alloy steel square pipes be used for?

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Structural Applications
Structural Applications
Automotive Industries
Automotive Industries
Oil and Gas Industry
Oil and Gas Industry
Power Generation
Power Generation

Excellent Features Of Alloy Steel Square Pipe

Gnee has been focusing on providing high-quality square tubes with a variety of excellent properties to customers around the world for 15 years. Come and get a quote now.

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Alloy steel square pipes are known for their exceptional strength and toughness. They possess higher tensile and yield strength compared to standard carbon steel pipes, allowing them to withstand heavy loads and impacts.

Many alloy steel square pipes are formulated with specific alloying elements that enhance their corrosion resistance. This makes them ideal for applications in harsh environments, such as the oil and gas industry or marine applications.

Alloy steel square pipes can withstand high temperatures without losing their structural integrity. They exhibit excellent heat resistance, making them suitable for applications involving heat transfer, such as in power generation or high-temperature manufacturing processes.

Alloy steel square pipes are highly resistant to wear and abrasion, making them well-suited for applications that involve sliding or abrasive contact. They can withstand the erosive effects of materials flowing through them, making them suitable for applications in mining, cement plants, and material handling.


Alloy steel square pipes are typically manufactured through a process that includes:

  • Melting and alloying the raw materials
  • Casting the steel into billets
  • Hot or cold forming the billets into square pipes
  • Heat treating to achieve desired mechanical properties
  • Cutting, finishing, and inspection to meet quality standards

Quality control measures include:

  • Chemical composition analysis
  • Mechanical testing (tensile strength, hardness, etc.)
  • Non-destructive testing (ultrasonic testing, radiographic testing)
  • Dimensional and visual inspections
  • Certification and documentation as per industry standards

Common alloying elements include:

  • Chromium (for corrosion resistance)
  • Molybdenum (for strength and toughness)
  • Nickel (for toughness and resistance to impact)
  • Vanadium (for strength and wear resistance)
  • Tungsten (for hardness at high temperatures)

Maintenance of alloy steel square pipes includes:

  • Regular inspections for signs of wear, corrosion, or damage
  • Cleaning to remove debris and prevent buildup of corrosive substances
  • Application of protective coatings if required
  • Proper storage to prevent exposure to harsh environmental conditions

What Can Gnee Guarantee For Our Customers?


Quality Assurance

As a supplier with 15 years of experience, we promise to provide high quality steel pipes, which comply with international standards and industry specifications, such as ISO, ASTM, EN, or JIS, etc. Gnee can provide relevant quality certifications, test reports & material certifications.

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Steel Pipe

Faster Delivery Time

Gnee has a large inventory of steel pipes and multiple production lines. We respond to customers’ orders on time and provide customers with reasonable transportation and delivery solutions. We promise to deliver steel pipes according to the time specified in the contract.

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Comprehensive Services

Comprehensive Services

Gnee provides comprehensive services for customers. Services include steel pipe customization, technical support & consultation, sample provision, etc. Through the guidance of a professional team, customers can ultimately purchase steel pipe specifications, sizes, and materials that meet project requirements.

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Competitive Price

Competitive Price

As a supplier, Gnee can promise to provide competitive prices and conduct reasonable negotiations with customers. Gnee has its own factory and production lines. Also, we have established stable cooperative relationships with many reliable raw material suppliers and can provide high-quality steel pipes to the world at factory prices.

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Why Choose Gnee Square Pipe?
Gnee’s alloy steel square pipes are distinguished by superior quality, performance, and compliance with strict industry standards. At Gnee, we prioritize customer satisfaction and strive to meet our customers’ needs and exceed their expectations. Our steel tubes are manufactured using high-quality materials and advanced production techniques. We employ stringent quality control measures to ensure that each pipeline meets the highest industry standards. The result is a durable and reliable product that provides long-lasting performance.

In addition, our pipe has been successfully exported to more than 60 countries such as Vietnam, Malaysia, Indonesia, Pakistan, UAE, and South Korea, etc. Many regular customers visit our company and factory and make multiple orders.

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What Services Does Gnee Provide?

Gnee can provide the following measurement services for pipe:

1. Dimensional measurement: Measure the dimensional parameters such as length, width, and thickness by measuring instruments to ensure the pipe is qualified and meets the design requirements.
2. Surface measurement: Measure parameters such as flatness, unevenness, and surface roughness of pipe surface to help ensure that the quality and surface state of the pipe meet the requirements.
3. Thickness measurement: Use a thickness measuring instrument to accurately measure the thickness of the pipe to ensure that it meets the design requirements.
4. Material measurement: Use material analysis instruments to measure the chemical composition and mechanical properties of the product to ensure that the quality and performance meet the requirements.
5. Bending and Deformation Measurements: The degree of bending and deformation of the steel pipe is measured and monitored by using tools such as bending measuring instruments and displacement sensors to ensure that it is within the allowable range.

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Gnee can customize the size and shape of steel pipes for your project according to specific project needs. The custom design of the pipe is carried out by a professional engineer and design team. Based on the requirements and constraints of the project, they will use calculation and simulation tools, combined with experience and technical knowledge, to optimize the steel pipe design to meet the specific needs of your engineering.

● According to the strength requirements of structural design, adjust the thickness, width, and length of pipes.
● The shape of the steel pipe can be designed according to the characteristics of the project.
● If you consider the convenience of installation and maintenance, we can also add openings and passages for easy access and operation in the design for areas that require frequent maintenance.

Ask Customized Services

Purchasing Gnee steel pipe can provide the following deep processing services. We can customize according to the specific needs of customers to meet the requirements.

Cutting service: Pipe can be custom cut to obtain the desired shape and size according to the needs of customers. For example, flame cutting, plasma cutting, laser cutting, etc., can cut steel pipes into required blocks, special-shaped parts.
Bending and forming: Pipes are bent and formed by stress application and appropriate processes to obtain the desired shape.
Welding service: Pipe can be subjected to various types of welding services, including manual arc welding, gas-shielded welding, laser welding, etc.
Turning and machining of holes: Turning and machining of holes in pipes by using machining equipment. These processes produce smooth surfaces, precise holes and threads to meet specific assembly requirements.
Surface treatment: In order to improve the corrosion resistance and aesthetics of the steel pipe, surface treatment can be carried out. This includes methods such as spraying, hot-dip galvanizing, electroplating, etc. to add a protective layer and provide corrosion resistance.

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Gnee can provide the following testing services through third-party testing agencies. These third-party testing services can provide independent, objective verification that pipes comply with relevant standards and regulations.

Material chemical composition analysis: Through chemical composition analysis, determine whether the composition of the steel pipe meets the standard requirements.
Mechanical performance test: Mechanical performance test includes tensile test, impact test, bending test, etc., which are used to determine whether the mechanical properties such as strength, toughness and ductility of products meet the specified requirements.
Metallographic testing: Through metallographic testing, check the structure, grain size, non-metallic inclusions, etc. of pipes to evaluate their quality and performance.
Corrosion performance test: Through the corrosion performance test, evaluate the corrosion resistance of pipes, including salt spray corrosion resistance, chemical corrosion resistance, etc.
Hardness test: Hardness test is used to measure the hardness of pipe, and its strength and wear resistance can be evaluated according to the hardness value.
Ultrasonic flaw detection: Ultrasonic flaw detection is used to detect internal defects of pipes, such as cracks, pores, inclusions, etc.

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