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Carbon Steel Hollow Sections (CS HS) Manufacturer, Supplier & Exporter – Heavy Structures & Load-Bearing Frames

Inox Steel India is a recognized manufacturer and global supplier of Carbon Steel Hollow Sections (CS HS) engineered specifically for heavy-duty structural applications, large frameworks, industrial platforms, long-span assemblies, and high-load environments. Produced in Square (SHS), Rectangular (RHS), and Circular (CHS) variants, our hollow sections comply with IS 4923, IS 1161, EN 10210 (Hot-Finished), EN 10219 (Cold-Formed), and ASTM A500 standards.

Carbon Steel Hollow Sections are widely preferred for structural systems due to their high yield strength, predictable mechanical properties, superior load distribution, and excellent weldability. With higher carbon content and enhanced structural performance compared to mild steel variants, CS Hollow Sections are ideal for industrial buildings, fabrication of heavy frames, mechanical equipment structures, infrastructure projects, and engineered support systems.

Inox Steel India manufactures hollow sections ranging from 40×40 mm to 500×500 mm (SHS), 50×25 mm to 500×300 mm (RHS), and 21.3 mm to 610 mm OD (CHS) with wall thicknesses up to 25 mm, catering to the demanding needs of structural engineers, EPC contractors, fabricators, and OEMs worldwide. Our production follows strict IS and EN quality controls, with testing facilities capable of UT, impact testing, hydrostatic testing, and weld integrity evaluation.

Carbon Steel Hollow Sections from Inox Steel India are trusted across India, the Middle East, Africa, Europe, and South America for high-load projects in oil & gas, heavy fabrication, industrial engineering, construction, and infrastructure development.

 

Table of Contents

How Carbon Steel Hollow Sections Are Manufactured

Carbon Steel Hollow Sections follow a precise manufacturing sequence to provide high strength, impact resistance, and dimensional accuracy for structural usage.

Manufacturing Steps:

  1. Slit Coil Preparation: High-strength carbon steel coils are slit into strips according to the final section dimensions.
  2. Forming & Shaping: The strip is gradually formed into Square, Rectangular, or Circular shapes using controlled roll-forming equipment to ensure consistent dimensions and straightness.
  3. High-Frequency Induction Welding (HFIW): Edges are welded using high-frequency current, creating a strong, reliable longitudinal weld. (For EN 10210 hot-finished sections, heat treatment ensures enhanced mechanical properties).
  4. Sizing, Shaping & Straightening: Sections pass through sizing rolls to achieve exact width, height, wall thickness, and squareness. This step ensures high load-bearing capacity.
  5. Non-Destructive Testing & Mechanical Testing: UT, Eddy Current, Impact Tests (Charpy), tensile tests, and dimensional checks ensure compliance with structural standards.
  6. Cutting & End Finishing: Hollow sections are cut to standard or customized lengths with plain or bevelled ends depending on structural application.
  7. Surface Protection: Supplied in Black, Painted, Primed, GI, or Shot-Blasted finishes based on project requirements.

Key Features & Advantages:

  • High yield and tensile strength for load-bearing structures
  • Excellent weldability based on controlled carbon levels
  • Superior impact resistance (S355J2H, Hot-Finished EN 10210)
  • Uniform wall thickness and dimensional accuracy
  • Suitable for long-span and high-load applications
  • Predictable structural performance under bending & compression
  • Available in heavy thicknesses up to 25 mm
  • Ideal for industrial and civil engineering structures

These characteristics make Carbon Steel Hollow Sections essential for frames, trusses, and infrastructure systems.

Grades & Standards (Technical Comparison Table)

Below is our Carbon Steel Hollow Section Technical Datasheet for heavy structures, frameworks, and engineering applications.

Carbon Steel Hollow Sections – Standards: IS 4923 | IS 1161 | EN 10210 | EN 10219

Parameter CS SHS (Square) CS RHS (Rectangular) CS CHS (Circular)
Applicable Standards IS 4923, IS 1161, EN 10210, EN 10219 IS 4923, IS 1161, EN 10210 / 10219 IS 1161, IS 3601, EN 10210 / 10219
Typical Grades YSt 210–310, S235JRH, S275JRH, S355J2H Same as SHS Same as SHS
Material Type Carbon Steel (Low/Medium) Carbon Steel (Low/Medium) Carbon Steel (Low/Medium)
Manufacturing Method ERW / HFIW / Hot-Finished ERW / HFIW / Hot-Finished ERW / HFIW / Hot-Finished
Service Use Heavy structures, platforms Large frames, long-span members Industrial frames, bracings
Yield Strength 210–355 MPa 210–355 MPa 210–355 MPa
Tensile Strength 330–510 MPa 330–510 MPa 330–510 MPa
Impact Toughness Excellent (S355J2H hot-finished) Excellent Excellent
Size Range 40×40–500×500 mm 50×25–500×300 mm 21.3 mm – 610 mm OD
Thickness Range 3.0 – 25 mm 3.0 – 25 mm 3.0 – 20 mm
Surface Finish Black, Painted, Shot-Blasted Same Same
Testing Methods Flattening, Drift, UT, Impact Same Same
Equivalent Standards ASTM A500 Gr B/C, EN 10210 Same Same

Key Selection Factors for Structural Buyers

Choosing high-strength carbon sections requires a focus on structural integrity and environment.

01.

Strength Requirement:
Evaluate if YSt 240 / YSt 310 or high-yield S275JRH / S355J2H is needed for the specific load.

02.

Processing Type:
Choose Hot-Finished (EN 10210) for critical stress relief or Cold-Formed (EN 10219) for dimensional precision.

03.

Shape Selection:
Select SHS / RHS / CHS based on the dominant load direction (bending vs. axial).

04.

Wall Thickness:
Heavier walls (up to 25 mm) are essential for static or high dynamic load-bearing structures.

05.

Impact Toughness:
Essential for low-temperature regions; S355J2H offers the best sub-zero performance.

06.

Surface Finish:
Black, Primed, GI, or Painted finishes depend on the final corrosive environment.

Global & Indian Demand Overview for Heavy Structural Sections

India:

  • Driven by Industrial fabrication, Oil & gas, Bridge projects, and PEB structures.
  • Hubs: Maharashtra, Gujarat, Tamil Nadu, Telangana, NCR.

Middle East & GCC:

  • Used in Oil & gas installations, Equipment skids, Pipe racks, and Industrial platforms.
  • Markets: UAE, Saudi Arabia, Oman, Qatar, Kuwait.

Africa:

  • Adopted for Mining structures, Agricultural frameworks, and Water infrastructure.
  • Regions: Kenya, Nigeria, South Africa, Tanzania.

Europe & Americas:

  • EN 10210 and ASTM A500 sections used in Stadiums, Bridges, and Heavy industrial plants.

Applications and Technical Specifications by Grade & Standard

Carbon Steel Hollow Sections are engineered for heavy-duty structures where strength, toughness, and dimensional accuracy are critical. Their high load-bearing capacity makes them essential for industrial and civil projects.

Applications by Grade / Type / Size

🔹 EN 10210 – S355J2H (Hot-Finished CS Hollow Sections)

  • Service Use: Heavy structures, Industrial buildings, Load-bearing frames, Pipe racks.
  • Key Properties: High yield strength (355 MPa), excellent impact toughness.
  • Size Range: 60×40 mm – 500×300 mm (RHS); 80×80 mm – 500×500 mm (SHS); 76 mm – 610 mm OD (CHS).
  • Industry Sectors: Oil & Gas | EPC | Power Plants | Infrastructure
🔹 EN 10219 – S235JRH / S275JRH (Cold-Formed CS Hollow Sections)

  • Service Use: Medium-to-heavy structural applications requiring dimensional precision.
  • Typical Applications: Machinery frames, Support beams, PEB structures, Platforms.
  • Size Range: 40×20 mm – 400×200 mm (RHS); 50×50 mm – 300×300 mm (SHS).
  • Industry Sectors: Industrial fabrication | Mechanical engineering | Construction
🔹 IS 4923 / IS 1161 – YSt 240 / YSt 310 (CS Structural Hollow Sections)

  • Service Use: General structural work where strength and weldability are required.
  • Typical Applications: Industrial sheds, Fabricated assemblies, Structural trusses.
  • Size Range: 40×40 mm – 300×300 mm (SHS); 50×25 mm – 350×200 mm (RHS).
  • Industry Sectors: Fabrication | Civil Engineering | OEM Manufacturing

CS Hollow Sections – Size & Weight Chart (Indicative)

Type Size Thickness Approx. Weight (kg/m)
SHS 80×80 mm 4.0 mm 10.20
SHS 150×150 mm 8.0 mm 28.50
SHS 300×300 mm 12.5 mm 69.40
RHS 100×50 mm 4.0 mm 8.10
RHS 200×100 mm 8.0 mm 24.70
RHS 500×300 mm 16.0 mm 92.20
CHS 114.3 mm OD 6.0 mm 16.20
CHS 219.1 mm OD 10.0 mm 42.00
CHS 508 mm OD 20.0 mm 125.50
Full EN 10210, EN 10219 & IS weight charts available as PDF upon request.

Pricing – Carbon Steel Hollow Sections (Indicative Range)

Type Size Range Avg. Price (₹/kg) Avg. Price ($/kg) Use
CS SHS 80×80 – 500×500 ₹68 – ₹95 $0.85 – $1.25 Heavy frameworks
CS RHS 100×50 – 500×300 ₹70 – ₹105 $0.90 – $1.35 Load-bearing structures
CS CHS 114.3 – 610 OD ₹72 – ₹115 $0.92 – $1.45 Industrial bracing

Prices vary by thickness, grade, finish (Black / Primed), and global steel index movement.

Download: CS Hollow Section Price List 2025 (INR + USD) – PDF

HSN / HS Code Classification

  • HSN 7306 — Carbon Steel Structural Hollow Sections.
  • Used globally for SHS, RHS, and CHS documentation.

Testing & Quality Assurance

CS Hollow Sections for heavy structures undergo comprehensive quality testing to ensure structural integrity.
Key Tests Performed:

  1. Tensile test & Yield strength verification
  2. Impact test (Charpy V-Notch)
  3. Ultrasonic testing (UT) & Eddy current test
  4. Flattening & drift test
  5. Hydrostatic test (on request)
  6. Dimensional & squareness checks
  7. Weld seam integrity evaluation

Documentation: EN 10204 – 3.1 / 3.2 • Third-party inspection (SGS, TUV, BV, DNV) available.

Why Choose Inox Steel India

Inox Steel India is a trusted manufacturer and global supplier of Carbon Steel Hollow Sections (SHS, RHS, CHS) engineered for demanding applications.
Key Advantages Our Clients Rely On:

  1. High-Strength Grades: S275JRH & S355J2H availability for critical structural projects.
  2. Certified Standards: Hot-finished & cold-formed options meeting EN 10210 / EN 10219 standards.
  3. Dimensional Accuracy: Straightness and precision ideal for long-span and load-bearing assemblies.
  4. Heavy Thickness Availability: Supply up to 25 mm thickness for high-engineered structural needs.
  5. Ready-to-Fabricate Finish: Shot-blasted & primed finish available for immediate installation.
  6. Large Inventory: Ready stock ensuring prompt delivery for major industrial projects.
  7. Global Export Expertise: Complete documentation and TPI support for worldwide shipments.

Industries & Applications We Serve

Industry Applications Preferred Grades
Oil & Gas Industry Pipe racks, skid structures, platforms S355J2H / S275JRH
EPC & Engineering Industrial buildings, structural frames EN 10210, IS 4923
Infrastructure Bridges, metro structures, walkways S355J2H
Power Plants Heavy frames, cable tray supports S275JRH / YSt 310
Fabrication & OEM Machinery frames, engineered components YSt 240 / YSt 310
PEB & Civil Trusses, columns, long-span beams RHS / SHS (S355J2H)

Carbon Steel Hollow Sections provide superior load-bearing capacity, stiffness, and strength-to-weight efficiency.

Export Readiness & Packaging

Inox Steel India exports Carbon Steel Hollow Sections to more than 40 countries for major industrial projects.

  • Steel-strapped bundles for secure handling
  • HDPE/PP wrapping for corrosion protection
  • End-cap protection for Circular sections (CHS)
  • Shot-blasted and primed options for ready installation
  • Bundle tags with size, grade, heat number & origin

🌍 Regular Export Markets: UAE • Saudi Arabia • Oman • Qatar • Kuwait • South Africa • Kenya • Nigeria • Egypt • Germany • Italy • UK • USA • Canada • Mexico • Brazil.

Talk to Our Experts – Get Instant Quote

Our technical and commercial team provides support for grade selection, section sizing, load suitability, and project-specific requirements for heavy structural applications.

Request complete EN & IS weight charts, MTCs, and project pricing today.

Inox Steel India

52-A, Mulji Thackersi Bldg, Islampura Street, Shop No. 10, Near Alankar Cinema, Mumbai – 400 004

Email

alloy@inoxsteelindia.in

Phone

+91 9930796690

Frequently Asked Questions (FAQs)

EN 10210 offers superior impact toughness and ductility for heavy structures.

40×40 mm to 500×500 mm (SHS), 50×25 mm to 500×300 mm (RHS), and up to 610 mm OD (CHS) with thicknesses up to 25 mm.

Yes, SGS, BV, TUV, and DNV inspections are available.

Black, painted, primed (shot-blasted), and GI finishes.

Yes, with full export documentation and project-specific compliance.

Get Mill-Tested Carbon Steel Hollow Sections Today

Inox Steel India supplies high-strength Carbon Steel Hollow Sections (EN 10210 / EN 10219 / IS 4923) for heavy structures, industrial frames, and load-bearing applications. Export-ready with full certification.

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