Hollow Structural Section Steel Pipe - Square & Rectangular by China Suppliers and Factory for Construction
Product Overview
| Product | Square and Rectangular Steel Pipe |
| Material | Carbon Steel |
| Grade | Q195 = S195 / ASTM A53 Grade A |
| Q235 = S235 / ASTM A53 Grade B / ASTM A500 Grade A / STK400 / SS400 / ST42.2 | |
| Q345 = S355JR / ASTM A500 Grade B / ASTM A500 Grade C | |
| Standard | DIN 2440, ISO 65, EN10219, GB/T 6728 |
| JIS G3444, JIS G3466 | |
| ASTM A53, ASTM A500, ASTM A36 | |
| Surface | Bare / Natural black / Painted |
| Oiled with or without wrapping | |
| Ends | Plain ends |
| Specification | Square: 20×20 mm – 500×500 mm |
| Rectangular: 20×40 mm – 300×500 mm | |
| Wall Thickness: 1.0 mm – 30.0 mm | |
| Length: 2 m – 12 m |
Key Features
High Strength-to-Weight Ratio
Hollow cross-section provides excellent load-bearing capacity while minimizing material consumption.
Versatile Applications
Suitable for structural, mechanical, architectural, and industrial uses.
Precise Dimensions
Manufactured to tight tolerances for consistent quality and ease of fabrication.
Excellent Weldability
Compatible with standard welding techniques for assembly and joining.
Multiple Finishes
Available in bare, painted, or oiled surfaces to suit different environmental conditions.
Customizable Lengths
Can be cut to specific lengths per project requirements.
Application
| Application Area | Common Uses |
| Construction & Building | Structural support, building frameworks, architectural components |
| Structural Pipe | Load-bearing columns, trusses, industrial frameworks |
| Fence Posts | Perimeter fencing, security barriers, agricultural fencing |
| Solar Mounting Components | Support structures for solar panels and mounting systems |
| Handrail Pipe | Stair railings, balcony railings, safety barriers |
Frequently Asked Questions
Q1
What steel grades are available for square and rectangular steel pipes?
Our square and rectangular steel pipes are available in Q195 (equivalent to S195 / ASTM A53 Grade A), Q235 (equivalent to S235 / ASTM A53 Grade B / ASTM A500 Grade A / STK400 / SS400 / ST42.2), and Q345 (equivalent to S355JR / ASTM A500 Grade B / ASTM A500 Grade C), covering a wide range of international standards.
Q2
What size range is available for square and rectangular steel pipes?
Square pipes are available from 20×20 mm up to 500×500 mm, while rectangular pipes range from 20×40 mm to 300×500 mm. Wall thickness options span from 1.0 mm to 30.0 mm, and lengths can be supplied from 2 m to 12 m.
Q3
What surface finishes are available for these steel pipes?
We offer multiple surface finish options including bare (natural black), painted, and oiled — with or without protective wrapping. These finishes help protect the pipes during transportation and storage, and can be selected based on your project's environmental requirements.
Q4
Which international standards do these steel pipes comply with?
Our square and rectangular steel pipes comply with multiple international standards, including DIN 2440, ISO 65, EN10219, GB/T 6728, JIS G3444, JIS G3466, ASTM A53, ASTM A500, and ASTM A36, making them suitable for projects worldwide.
Q5
Can the steel pipes be customized to specific lengths?
Yes. We offer customizable cutting services to meet your specific project requirements. Pipes can be supplied in lengths ranging from 2 m to 12 m, and custom lengths within this range can be arranged upon request.
Q6
What are the main application areas for square and rectangular steel pipes?
These pipes are widely used across multiple industries, including construction and building (structural support and frameworks), structural applications (load-bearing columns and trusses), fence posts (perimeter and agricultural fencing), solar mounting systems (panel support structures), and handrail installations (stair and balcony railings).