JIS G3466 G3444 Standard Hot-Dip Galvanized Square and Rectangular Steel Pipe
JIS G3466 G3444 Standard Hot-Dip Galvanized Square and Rectangular Steel Pipe
JIS Standard Square and Rectangular Steel Pipe
FOB, CIF
20tons
tons
Tianjin, China
30Day
Youfa's square and rectangular steel pipes are manufactured in accordance with JIS G3466 and JIS G3444 standards, which are widely used in construction, structural engineering, and general-purpose applications across Japan and many international markets.
Quantity
What is JIS Standard?
JIS stands for Japanese Industrial Standards, which are the national standards established by the Japanese Industrial Standards Committee and maintained by the Japanese government. These standards define the quality, dimensions, performance, and testing methods for various industrial materials and products, including steel pipes.
In the steel industry, JIS standards are widely recognized for their high quality control, dimensional accuracy, and strict technical requirements. Common JIS standards for structural steel pipes include JIS G3444 and JIS G3466, which specify carbon steel pipes for general and structural applications.
Using JIS-standard steel pipes ensures consistency, reliability, and international compatibility, making them a preferred choice in global construction and engineering projects.
What is JIS Standard Square and Rectangular Steel Pipes
Youfa's square and rectangular steel pipes are manufactured in accordance with JIS G3466 and JIS G3444 standards, which are widely used in construction, structural engineering, and general-purpose applications across Japan and many international markets.
JIS G3466 specifies square and rectangular carbon steel tubes intended for general structural use, focusing on dimensional accuracy, surface quality, and mechanical properties. It is often chosen for projects requiring consistent shapes and reliable strength.
JIS G3444 covers carbon steel pipes for general structural applications, commonly used in building frames, civil engineering, and other load-bearing structures. While the standard primarily defines round pipes, it is also applied to square and rectangular sections in practice.
To meet different project requirements, Youfa offers both black (non-galvanized) and hot-dip galvanized versions of JIS-standard square and rectangular pipes. The galvanized type undergoes a hot-dip process where a layer of molten zinc is applied to the surface, providing strong resistance to corrosion and extending the service life of the steel in harsh or outdoor environments.
Whether black or galvanized, all pipes are produced under strict quality control and conform to JIS standards for mechanical strength, uniformity, and structural reliability, making them a dependable choice for customers worldwide.
Details of JIS Square and Rectangular Steel Pipes
| Item | Details |
|---|---|
| Product Type | Square and Rectangular Carbon Steel Pipe |
| Material Grade | SS400 (Equivalent to Q235 / S235 / A53 Gr.B / A500 Gr.A / STK400 / ST42.2) |
| Standard | JIS G3466 |
| Surface Treatment | Black (as rolled), Painted, Oiled, With or Without End Caps & Bundling |
| Pipe End Type | Plain End |
| Square Tube Size | 20×20 mm – 500×500 mm |
| Rectangular Tube Size | 20×40 mm – 300×500 mm |
| Wall Thickness | 1.0 mm – 30.0 mm |
| Length | 2 m – 12 m (customizable upon request) |
JIS Standard Square and Rectangular Steel Pipes Show
Advantages of JIS Square and Rectangular Steel Pipes
High Dimensional Accuracy
Pipes manufactured under JIS G3444 and G3466 feature precise dimensions and consistent wall thickness, ensuring a reliable fit for structural and mechanical applications.
Excellent Corrosion Resistance
The optional hot-dip galvanized coating forms a durable zinc layer that protects the steel from rust and corrosion, making the pipes ideal for outdoor or humid environments.
Good Weldability and Workability
These carbon steel pipes offer stable mechanical properties and are easy to cut, weld, and fabricate, supporting a wide range of construction and engineering uses.
Versatile Application
Suitable for use in building structures, machinery frames, transportation equipment, and other general-purpose structural needs.
Material Grade Options: SS400 and STKR400
SS400: A common structural carbon steel with a minimum yield strength of approximately 400 MPa, offering good weldability and mechanical performance for general applications.
STKR400: A higher strength structural steel pipe grade under JIS standards with a minimum yield strength of 400 MPa, designed specifically for square and rectangular pipes, providing enhanced load-bearing capacity and deformation resistance for demanding structural projects.
Compliant with Japanese Industrial Standards
JIS G3444 covers general structural pipes, while G3466 focuses on structural square and rectangular pipes — both ensuring strict quality control and performance consistency.
Applications of JIS Square and Rectangular Steel Pipes
JIS G3444 / G3466 square and rectangular steel pipes are widely utilized in various structural and engineering sectors due to their excellent mechanical performance, accurate dimensions, and optional corrosion-resistant coating. Key application areas include:
Building and Civil Construction
These pipes are commonly used in the construction of steel frameworks, columns, crossbeams, scaffolding, fencing, and temporary or permanent support systems. Their uniform shape and structural strength make them ideal for load-bearing applications in commercial and residential buildings.
Infrastructure and Public Projects
Widely applied in the development of infrastructure such as pedestrian bridges, highway guardrails, signposts, street furniture, and municipal fencing systems. When galvanized, they provide long-term durability in outdoor and exposed environments.
Mechanical Structures and Industrial Equipment
In machinery manufacturing and industrial setups, these pipes serve as key components in equipment frames, conveyor supports, storage racks, brackets, and protective enclosures. Their good weldability and stable structure ensure reliable performance under mechanical stress.
Automotive and Transportation Equipment
Used for fabricating frames of trailers, truck beds, container structures, and transport platforms where strength, weight balance, and shape uniformity are essential.
Agricultural and Greenhouse Projects
Suitable for constructing greenhouse frames, irrigation system supports, livestock pens, and other agricultural facilities, especially when galvanized pipes are used to resist rust and weather conditions in rural settings.
Interior Design and Architectural Applications
Increasingly adopted in industrial-style furniture, decorative wall structures, handrails, shelving units, and partitions. The clean, geometric look of square and rectangular tubing fits well with modern architectural aesthetics.
Whether black (non-galvanized) or hot-dip galvanized, JIS G3444 / G3466 pipes offer versatile solutions across both indoor and outdoor applications, meeting the needs of engineers, builders, and designers alike.
FAQ of JIS Square and Rectangular Steel Pipes
Q1: What is the difference between JIS G3444 and JIS G3466?
A: JIS G3444 applies to circular, square, and rectangular carbon steel pipes for general structural purposes, while JIS G3466 specifically covers square and rectangular steel pipes used in structural applications such as building frames and machinery components.
Q2: Do you offer both black and galvanized square/rectangular pipes?
A: Yes. We can supply both black (non-galvanized) and hot-dip galvanized square and rectangular steel pipes, depending on your application needs.
Q3: What are the common material grades for your JIS square and rectangular pipes?
A: We mainly offer pipes in SS400 and STKR400 grades. SS400 is a widely used structural carbon steel, while STKR400 is designed specifically for structural pipe applications with enhanced mechanical strength.
Q4: What surface treatment options are available?
A: We provide plain (black) surface, anti-rust oil coating, and hot-dip galvanizing. Galvanized pipes offer superior corrosion resistance, especially for outdoor or humid environments.
Q5: Can these pipes be used for welding and fabrication?
A: Absolutely. JIS G3444 / G3466 pipes have excellent weldability and formability, making them suitable for various fabrication processes such as cutting, bending, and welding.
Q6: What is the typical length of your square and rectangular steel pipes?
A: Our standard length is 6 meters, but customized lengths can be provided upon request.
Q7: Are these pipes suitable for load-bearing applications?
A: Yes. Both SS400 and STKR400 pipes offer sufficient strength and reliability for structural support, especially in construction and engineering projects.
