- Keywords: Square Hollow Sections (SHS), Rectangular Hollow Sections (RHS), Cold-Formed Hollow Structural Steel
- Size: RHS OD: 20mm*10mm ~ 400mm*300mm
- SHS OD:10mm*10mm ~ 400mm*400mm
- Standard: EN 10210, EN 10219, ASTM A500 Grade B/C, ASTM A513
- Material: Carbon Steel (e.g., Q235, Q345), Low-Alloy Steel
- Surface treatment: Hot-Dip Galvanized, Painted, Powder-Coated
Product Description of Hollow Section
Hollow Section Steel (also known as structural hollow sections) includes Square Hollow Sections (SHS), Rectangular Hollow Sections (RHS), and Circular Hollow Sections (CHS). These are high strength, hollow profile steel products widely used in construction, steel structures, machinery, and engineering projects. Made from premium carbon steel and low alloy steel, our hollow sections offer stable performance, precise dimensions, good weldability, and strong load bearing capacity. They are lightweight, durable, easy to machine and install, and widely recognized in modern structural design.This type of steel is cold-formed hollow section steel, widely used in building structures, machinery manufacturing, and engineering supports.
Types of Hollow Section
1. Rectangular Hollow Section(Rectangular Steel tube)
Rectangular Hollow Section (RHS) is a type of metal profile with a rectangular cross-section and hollow interior, widely used in structural engineering, construction, and machinery frames.
Rectangular tube standard: EN 10210:S235JRH, S355J2H, S355NH, EN 10219:S235-S550, EN ASTM A500:GR.B, ASTM A501:GR.B
RHS is manufactured in a wide range of dimensions and thicknesses, as well as combinations of both. available thicknesses across the board are 1.6 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 5 mm, 6 mm, 8 mm, 9 mm, 10 mm, 12.5 mm, and 16 mm. dimensions range from 50 mm x 20 mm to 400 mm to 300 mm.
2. Square Hollow Section(Square Steel tube)
Square Hollow Section (SHS), also known as square steel tube, is a type of structural hollow steel profile with equal side lengths. It is widely used in construction, steel structures, machinery manufacturing, infrastructure and fabrication projects due to its high strength, stable structure and convenient processing.
Square tube standard: EN 10210:S235JRH, S355J2H, S355NH, S355J0H, EN 10219:S235JRH, S355J2H, S355NH, S355J0H, ASTM A500:GR.A, GR.B ,GR.C
SHS steel tubing has similar uses to rhs and is used for both industrial and construction applications. square section rhs is available in the same thicknesses as rhs and dimensions range from 20 mm x 20 mm to 400 mm x 400 mm.
Main Features of Hollow Section
High strength-to-weight ratio: Provides excellent load-bearing capacity with reduced structural mass
Uniform wall thickness and dimensional accuracy: Achieved through cold-forming and welding processes
Easy to weld, bolt, or assemble: Flat surfaces allow for simple connection with standard fittings
Versatile applications: Suitable for building frames, trusses, machinery supports, and solar mounting systems
Available in seamless or welded types: Welded is most common; seamless offers higher pressure resistance
Application of Hollow Section:
Applications of SHS (Square Hollow Section)
Building structures: Columns, vertical supports, portal frames, and trusses.
Steel racks & shelving: Uprights, beams, and storage system frames.
Furniture & fittings: Table legs, chair frames, display stands, and handrails.
Transport & machinery: Vehicle chassis, trailer frames, machine bases, and protective frames.
Architectural design: Exposed structural elements, curtain wall supports, and decorative frameworks.
Fencing & guardrails: Posts, frames, and safety barriers.
Applications of RHS (Rectangular Hollow Section)
Structural beams: Horizontal beams, lintels, and members under bending in one direction.
Construction & engineering: Roof trusses, bridge components, support frames, and steel structures.
Material handling: Pallet rack beams, conveyor frames, and industrial workstations.
Automotive & machinery: Truck frames, agricultural equipment, mechanical arms, and engineering machinery.
Architectural & exterior: Canopy supports, facade frames, and outdoor structures.
General fabrication: Signposts, stage structures, exhibition booths, and steel fabrication projects.
Orichpipe has engaged in the steel pipe industry for 33 years with rich experience and strong strengths. We offers a comprehensive range of steel hollow sections: RHS and SHS in a range of sizes, lengths and grades.
Get a free quote and special discount now: info@orichpipe.com
Standard of Hollow Section
1. European Standard (EN)
EN 10210: Hot-finished welded hollow sections (for heavy-wall, high-load structures)
EN 10219: Main standard – Cold-formed welded hollow sections (most widely used)
Applies to SHS, RHS, CHS (circular)
Common grades: S235JR, S275JR, S355JR/J0/J2
Dimensions: 20×20 to 400×400 mm (SHS); thickness 1.5–20 mm
2. American Standard (ASTM)
ASTM A500: Cold-formed carbon & high-strength hollow structural sections (HSS)
Grades: A, B, C (Grade C: highest strength)
Used in North American construction, bridges, machinery
3. Chinese Standard (GB)
GB/T 6728: Cold-formed square/rectangular hollow sections
GB/T 3094: Seamless square/rectangular tubes
Common grades: Q235B, Q355B (equivalent to S235/S355)
4. Japanese Standard (JIS)
JIS G 3466: Carbon steel square/rectangular tubes for general structure
Standard dimensions, tolerances, mechanical properties
5. British Standard (BS)
BS EN 10210 / BS EN 10219: Aligned with European standards
Historically: BS 4848 (now replaced by EN)
Specification of Hollow Section
Rectangular Hollow Section | Square Hollow Section | ||||||
Size | Thickness | Size | Thickness | Size | Thickness | ||
mm | mm | mm | mm | mm | mm | ||
50 X 25 | 2.0 | 120 X 40 | 3.0 | 20 x 20 | 2.0 | ||
50 X 25 | 2.5 | 120 X 40 | 3.6 | 20 x 20 | 2.5 | ||
50 X 25 | 3.0 | 120 X 40 | 4.0 | 25 x 25 | 2.0 | ||
50 X 30 | 2.5 | 120 X 40 | 5.0 | 25 x 25 | 2.5 | ||
50 X 30 | 3.0 | 120 X 40 | 6.0 | 25 x 25 | 3.0 | ||
50 X 30 | 3.2 | 120 X 40 | 6.3 | 30 x 30 | 2.5 | ||
50 X 30 | 4.0 | 120 X 60 | 3.0 | 30 x 30 | 3.0 | ||
60 X 40 | 2.5 | 120 X 60 | 3.6 | 40 x 40 | 2.0 | ||
60 X 40 | 3.0 | 120 X 60 | 4.0 | 40 x 40 | 2.5 | ||
60 X 40 | 3.2 | 120 X 60 | 5.0 | 40 x 40 | 3.0 | ||
60 X 40 | 4.0 | 120 X 60 | 6.0 | 40 x 40 | 4.0 | ||
80 X 40 | 3.0 | 120 X 60 | 6.3 | 50 x 50 | 2.0 | ||
80 X 40 | 3.2 | 120 X 80 | 3.0 | 50 x 50 | 2.5 | ||
80 X 40 | 4.0 | 120 X 80 | 4.0 | 50 x 50 | 3.0 | ||
80 X 60 | 2.5 | 120 X 80 | 5.0 | 50 x 50 | 4.0 | ||
80 X 60 | 3.0 | 120 X 80 | 6.0 | 50 x 50 | 5.0 | ||
80 X 60 | 3.6 | 120 X 80 | 6.3 | 60 x 60 | 3.0 | ||
80 X 60 | 4.0 | 150 X100 | 3.0 | 60 x 60 | 4.0 | ||
80 X 60 | 5.0 | 150 X100 | 4.0 | 60 x 60 | 5.0 | ||
90 X 50 | 2.5 | 150 X100 | 5.0 | 70 x 70 | 3.0 | ||
90 X 50 | 3.0 | 150 X100 | 6.0 | 70 x 70 | 3.6 | ||
90 X 50 | 3.6 | 150 X100 | 6.3 | 70 x 70 | 5.0 | ||
90 X 50 | 4.0 | 160 X 80 | 3.0 | 80 x 80 | 3.0 | ||
90 X 50 | 5.0 | 160 X 80 | 4.0 | 80 x 80 | 3.6 | ||
100 X 40 | 3.0 | 160 X 80 | 5.0 | 80 x 80 | 5.0 | ||
100 X 40 | 3.6 | 160 X 80 | 6.0 | 80 x 80 | 6.0 | ||
100 X 40 | 4.0 | 160 X 80 | 6.3 | 90 x 90 | 3.0 | ||
100 X 40 | 5.0 | 200 X 100 | 4.0 | 90 x 90 | 3.6 | ||
100 X 50 | 3.0 | 200 X 100 | 5.0 | 90 x 90 | 5.0 | ||
100 X 50 | 3.6 | 200 X 100 | 6.0 | 90 x 90 | 6.0 | ||
100 X 50 | 4.0 | 200 X 100 | 6.3 | 100 x 100 | 4.0 | ||
100 X 50 | 5.0 | 200 X 100 | 8.0 | 100 x 100 | 5.0 | ||
100 X 50 | 6.0 | 200 X 100 | 10.0 | 100 x 100 | 6.0 | ||
100 X 50 | 6.3 | 200 X 100 | 12.5 | 100 x 100 | 8.0 | ||
100 X 60 | 3.0 | 200 X 100 | 16.0 | 100 x 100 | 10.0 | ||
100 X 60 | 3.6 | 250 X 150 | 6.3 | 120 x 120 | 5.0 | ||
100 X 60 | 4.0 | 250 X 150 | 8.0 | 120 x 120 | 6.0 | ||
100 X 60 | 5.0 | 250 X 150 | 10.0 | 120 x 120 | 8.0 | ||
100 X 60 | 6.0 | 250 X 150 | 12.5 | 120 x 120 | 10.0 | ||
100 X 60 | 6.3 | 250 X 150 | 16.0 | 150 x 150 | 5.0 | ||
100 X 80 | 3.0 | 300 X 200 | 6.3 | 150 x 150 | 6.0 | ||
100 X 80 | 3.6 | 300 X 200 | 8.0 | 150 x 150 | 8.0 | ||
100 X 80 | 4.0 | 300 X 200 | 10.0 | 150 x 150 | 10.0 | ||
100 X 80 | 5.0 | 300 X 200 | 12.5 | 180 x 180 | 6.0 | ||
100 X 80 | 6.0 | 300 X 200 | 16.0 | 180 x 180 | 8.0 | ||
100 X 80 | 6.3 | 400 X 200 | 10.0 | 180 x 180 | 10.0 | ||
400 X 200 | 12.5 | 180 x 180 | 12.5 | ||||
400 X 200 | 16.0 | 200 x 200 | 6.0 | ||||
450 X 250 | 10.0 | 200 x 200 | 8.0 | ||||
450 X 250 | 12.5 | 200 x 200 | 10.0 | ||||
450 X 250 | 16.0 | 200 x 200 | 12.5 | ||||
250 x 250 | 8.0 | ||||||
250 x 250 | 10.0 | ||||||
250 x 250 | 12.5 | ||||||
300 x 300 | 8.0 | ||||||
300 x 300 | 10.0 | ||||||
300 x 300 | 12.5 | ||||||
Steel Grade: Q195, Q215, Q235, Q345, S235JR, S275JR, SS4007
Data | Elements（%） | ||||
Materal Grade | C | Mn | S | P | Si |
Q195 | 0.06-0.12 | 0.25-0.50 | <0.05 | <0.045 | <0.30 |
Q215 | 0.09-0.15 | 0.25-0.55 | <0.05 | <0.045 | <0.30 |
Q235 | 0.12-0.20 | 0.30-0.70 | <0.045 | <0.045 | <0.30 |
Q345 | <0.20 | 1.0-1.6 | <0.04 | <0.04 | <0.55 |
Mechanical property
Materal Grade | Yield point (Mpa) | Tensile Strength (Mpa) | Elongation(%) |
Q195 | >195 | 315-430 | 32-33 |
Q215 | >215 | 335-450 | 26-31 |
Q235 | >235 | 375-500 | 24-26 |
Q345 | >345 | 470-630 | 21-22 |
Tolerance:
Length | +/- 50 MM |
Wall Thickness | +/- 12.5% |
Weight | +/- 8% |
Note:
A: with, T: wall thickness,
SHS:Square Hollow Section
RHS: Rectangular Hollow Section
Surface Finish: hot dipped galvanized, electro galvanized, black
Mill Test Certificate: EN 10204/3.1B
Third party inspection: SGS, BV, Lloyds etc.
Note: Pre-galvanized square / rectangular hollow section with OD 19mm-70mm and thickness 1mm-2.3mm are also available.
Manufacturing of Hollow Section
