Product Introduction

Carbon Steel Square Hollow Section (SHS) is a cold-formed welded structural steel tube with a uniform square cross-section. Designed for fabrication and structural applications, square hollow sections offer a practical combination of strength, dimensional consistency, and efficient material use.

MGTSP supplies structural square steel tubes in steel grades including Q235 and Q355 series, with options corresponding to ASTM, EN, JIS, and other project specifications. Available processing and finishing options include cutting, punching, beveling, painting, and hot-dip galvanizing.

These structural steel square tubes are used in building frameworks, industrial equipment supports, machinery bases, storage systems, and infrastructure applications.

The required steel grade, section dimensions, wall thickness, and surface treatment should be selected according to the project’s structural design and service environment.

Key Features

1. Cold-Formed Welded Construction

Manufactured using cold-bending and high-frequency welding processes to create a regular square hollow section with consistent wall geometry.

2. Efficient Structural Profile

The hollow square cross-section provides bending and torsional resistance while offering efficient material use compared with some solid-section alternatives.

3. Suitable for Structural Fabrication

Flat external surfaces and a regular cross-section facilitate cutting, drilling, welding, and assembly into different structural configurations.

4. Multiple Steel Grade Options

Material options include Q235B, Q235C, Q355B, Q355C, and Q355ND, alongside other grades listed in the original product range.

5. Surface Treatment Options

Black steel, bright-finish, and hot-dip galvanized options are listed to accommodate different finishing and environmental requirements.

6. Custom Processing Options

Cutting, punching, and beveling services can be specified to support project fabrication and installation.

Technical Specifications

Parameter	Specification
Product	Carbon Steel Square Hollow Section (SHS)
Product Type	Cold-Formed Welded Square Steel Tube
Chinese Steel Grades	Q235B, Q235C, Q355B, Q355C, Q355ND
ASTM Grades Listed	A36, A572 Grade 50
EN Grades Listed	S235, S355 Series
JIS Grades Listed	SS400, SM490
Russian Grades Listed	St Series, 09G2S
Cross-Section	Square Hollow Section
Dimensions	Standard and custom section sizes
Wall Thickness	Thin-wall and heavy-wall options
Standard Length	6 m, 9 m, 12 m
Surface Options	Black, bright-finish, hot-dip galvanized
Processing Options	Cutting, punching, beveling
Manufacturing Method	Cold Forming and High-Frequency Welding

Applications

Structural Steel Frameworks

Square hollow sections are used for factory structures, columns, support frames, and other building components where their dimensions and mechanical properties meet the design requirements.

Industrial Equipment Supports

Suitable for machinery bases, conveyor structures, working platforms, and industrial support frames.

Storage and Material Handling

Used in heavy-duty storage racks, equipment frames, and supporting structures for industrial facilities.

Architectural and Building Components

Applicable to door and window frames, guardrails, sunroom structures, curtain-wall framing, and outdoor structural fabrication.

Infrastructure and Municipal Projects

Can be used in road barriers, pedestrian bridge components, and other engineered steel structures when the required material grade and structural performance are verified.

Product Details & Surface Treatments

Carbon steel square hollow sections have flat external faces and a regular internal hollow profile, allowing different structural components to be joined and assembled.

The original product range includes several finishing and processing options.

Black Steel Finish

Suitable for projects where additional surface treatment or coating may be applied during fabrication.

Hot-Dip Galvanized Finish

A zinc-coated finish option for projects requiring additional protection against atmospheric corrosion, subject to the specified coating standard and service conditions.

Cut-to-Length Processing

Standard lengths of 6 m, 9 m, and 12 m are listed, with cutting services available for project-specific dimensions.

Fabrication Options

Punching and beveling can be specified to support subsequent processing and installation.

Recommended product images include cross-section views, actual wall thickness, cut ends, available surface finishes, and completed structural fabrication examples.

Ordering & Quality Documentation

When requesting a quotation for carbon steel square hollow sections, please provide the following details:

Steel grade or applicable material standard

Square section dimensions

ü Wall thickness

ü Required length

ü Surface finish or coating requirements

ü Cutting, punching, or beveling requirements

ü Order quantity

ü Destination country or delivery location

For structural applications, buyers should identify the applicable product standard, material properties, dimensional tolerances, and inspection requirements in the purchase specification.

MGTSP can review the requested details and confirm suitable product specifications, available processing services, material documentation, and delivery arrangements before the order is finalized.

Frequently Asked Questions

What is a carbon steel square hollow section?

A carbon steel square hollow section is a steel tube with a square-shaped cross-section and a hollow interior. It is commonly used for structural frames, equipment supports, and fabricated steel assemblies.

What is the difference between square hollow sections and solid square steel bars?

A square hollow section has a hollow interior, whereas a solid square steel bar is filled throughout its cross-section. Their weights, sectional properties, fabrication characteristics, and structural applications differ.

Which steel grades are available?

The original product range lists Q235 and Q355 series, ASTM A36 and A572 Grade 50, EN S235 and S355 series, and other regional grades. Actual product specifications and availability should be confirmed when ordering.

Can square hollow sections be hot-dip galvanized?

Hot-dip galvanizing is listed as a surface treatment option. Coating requirements and availability should be confirmed according to the intended project application.

What lengths are available?

Standard lengths listed include 6 m, 9 m, and 12 m. Cutting services can be discussed for project-specific requirements.

Request a Quote

Need carbon steel square hollow sections for structural fabrication, building construction, or industrial equipment applications?

Contact MGTSP with your required steel grade, section dimensions, wall thickness, length, surface finish, and order quantity for a project-specific quotation.