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Inox Steel India is a trusted manufacturer and global supplier of ASTM A500 Hollow Structural Sections (HSS) including Square (SHS), Rectangular (RHS), and Round (CHS) structural tubing designed for architectural, engineering, and fabrication applications. Manufactured in strict accordance with ASTM A500 Grade A, B, C & D, these sections offer dependable strength, weldability, and uniformity for both static and dynamic loading conditions.
ASTM A500 is the primary American specification for cold-formed welded and seamless carbon steel structural hollow sections, extensively used in commercial buildings, stadiums, industrial structures, bridges, transport equipment, and modular fabrication systems. With minimum yield strengths ranging from 33 ksi to 50 ksi (228–345 MPa) depending on the grade, A500 HSS provides excellent strength-to-weight efficiency and structural stability.
Inox Steel India supplies a wide dimensional range of ASTM A500 HSS:
With consistent dimensional accuracy, strong corner profiles, reliable weld seams, and structural predictability, ASTM A500 hollow sections are widely preferred across the USA, Canada, Mexico, Middle East, and Asia for industrial, architectural, and engineered steel frameworks.
ASTM A500 HSS sections follow a controlled cold-forming and welding process that ensures high structural performance, dimensional accuracy, and consistent mechanical properties.
1️⃣ Coil Slitting
High-quality carbon steel coils are slit to required widths depending on the final section dimensions.
2️⃣ Cold Forming
Slit strips are progressively formed into round, square, or rectangular tubular shapes using automated roll forming lines.
3️⃣ Electric Resistance Welding (ERW)
Edges are welded using high-frequency induction to create a uniform, strong longitudinal seam.
4️⃣ Weld Bead Removal & Normalization (Optional)
External and internal weld beads are scarfed, and the weld zone may be normalized in thicker sections for uniformity.
5️⃣ Sizing & Shaping
The hollow tubes pass through calibration stands to achieve exact tolerance, corner radii, straightness, and dimensional accuracy.
6️⃣ Surface Conditioning
Sections may be supplied as:
7️⃣ Quality Control & NDT
Weld seam inspection, tensile testing, dimensional checks, and mechanical property validation ensure compliance with ASTM A500.
This cold-forming production method provides efficient structural hollow sections with predictable strength and weldability.
Key Features & Advantages of ASTM A500 Hollow Sections
ASTM A500 HSS tubing delivers strength, versatility, and reliability for structural and architectural steel applications.
| Property | Grade A | Grade B | Grade C | Grade D |
|---|---|---|---|---|
| Yield Strength | 33 ksi (228 MPa) | 42 ksi (290 MPa) | 46 ksi (317 MPa) | 50 ksi (345 MPa) |
| Tensile Strength | 45 ksi | 58 ksi | 62 ksi | 62 ksi |
| Applications | Light structures | General fabrication | Structural loading | Heavy structures |
Key Selection Factors for Buyers
Global Market Usage & Demand Overview
United States & Canada
Widely used in commercial buildings, stadiums, transportation frames, billboards, and steel structures.
Middle East & GCC
Preferred for warehouses, architectural steel, modular frames, and fabrication projects.
Africa
Used for scaffolding, industrial structures, agricultural buildings, and mechanical supports.
Asia-Pacific
Popular in fabrication workshops, industrial manufacturing, and construction equipment structures.
ASTM A500 HSS sections are widely used across structural steel design due to their high strength, excellent weldability, and predictable mechanical performance. Each grade is selected based on the structural load requirement, fabrication conditions, and end application.
🔹 ASTM A500 Grade A (Light Structural & Architectural Applications)
Service Use:
Handrails • Walkways • Architectural frames • Light structural fabrication
Key Characteristics:
Good strength, smooth formability, cost-effective for non-critical load structures.
Size Range:
SHS 25×25 to 150×150 mm
RHS 40×25 to 200×100 mm
CHS 21.3 to 168 mm OD
Industry Sectors:
Architectural fabrication • Light engineering • Furniture frames
🔹 ASTM A500 Grade B (General Structural Applications)
Service Use:
PEB structures • Frames • Supports • Industrial fabrication • Platforms
Key Characteristics:
Higher yield strength compared to Grade A, excellent dimensional accuracy.
Size Range:
SHS up to 250×250 mm
RHS up to 250×150 mm
CHS up to 219 mm OD
Industry Sectors:
Construction • Warehousing • Commercial structures
🔹 ASTM A500 Grade C (Structural & Load-Bearing Applications)
Service Use:
Columns • Trusses • Lifting frames • Equipment structures • Bridges
Key Characteristics:
High strength with excellent weldability; consistent mechanical properties.
Size Range:
SHS up to 350×350 mm
RHS up to 350×200 mm
CHS up to 355 mm OD
Industry Sectors:
Structural engineering • Heavy fabrication • Industrial plants
🔹 ASTM A500 Grade D (High-Strength Applications)
Service Use:
Cranes • Billboards • Transmission structures • Stadiums • High-load architectural elements
Key Characteristics:
Highest minimum yield strength (50 ksi / 345 MPa) within the standard.
Size Range:
SHS up to 400×400 mm
RHS up to 500×300 mm
CHS up to 508 mm OD
Industry Sectors:
Offshore modular units • Large-span structures • Dynamic load frameworks
ASTM A500 – Size & Weight Chart (Indicative)
| Type | Size | Thickness | Approx. Weight (kg/m) |
|---|---|---|---|
| SHS | 50×50 | 3.2 mm | 4.53 |
| SHS | 150×150 | 6.0 mm | 26.40 |
| SHS | 300×300 | 10.0 mm | 74.10 |
| RHS | 100×50 | 4.0 mm | 8.56 |
| RHS | 250×150 | 8.0 mm | 30.95 |
| RHS | 400×300 | 12.5 mm | 87.50 |
| CHS | 48.3 OD | 3.6 mm | 4.47 |
| CHS | 168.3 OD | 5.0 mm | 19.20 |
| CHS | 355.6 OD | 12.5 mm | 102.80 |
📩 Full ASTM A500 size chart can be provided on request.
Indicative Price Range – ASTM A500 HSS
| Grade | Type | Avg. Price (₹/kg) | Avg. Price ($/kg) | Applications |
|---|---|---|---|---|
| Grade A | SHS/RHS/CHS | ₹78 – ₹95 | $1.05 – $1.25 | Light structures |
| Grade B | SHS/RHS/CHS | ₹85 – ₹105 | $1.12 – $1.30 | Structural frameworks |
| Grade C | SHS/RHS/CHS | ₹95 – ₹125 | $1.22 – $1.55 | Heavy structures |
| Grade D | SHS/RHS/CHS | ₹110 – ₹150 | $1.45 – $1.95 | High-load applications |
Pricing varies by size, thickness, grade, and export destination.
HSN / HS Code Classification
HSN 7306 — Welded / cold-formed carbon steel hollow structural sections.
Applicable for SHS, RHS, and CHS under ASTM A500.
Testing & Quality Assurance
ASTM A500 requires strict testing to ensure compliance with structural design expectations.
Mechanical Tests
Non-Destructive Testing
Documentation We Provide
Inox Steel India is a trusted manufacturer and global exporter of ASTM A500 Hollow Structural Sections (HSS), supplying SHS, RHS, and CHS tubing engineered for structural steel fabrication, architectural frameworks, modular buildings, and industrial applications. Our A500 Grade A/B/C/D sections are produced with precise dimensional tolerances, high weldability, and reliable mechanical performance—ensuring consistent results in structural design.
✔ Key Benefits of Choosing Our ASTM A500 HSS
Our ASTM A500 hollow sections deliver unmatched structural reliability for architects, engineers, and fabricators worldwide.
Industries & Applications We Serve
| Industry | Applications | Preferred A500 Grades |
|---|---|---|
| Construction & Infrastructure | Columns, mezzanines, beams, bracings | Grade B / C |
| Architectural Steel | Facades, frames, glass support systems | Grade A / B |
| Heavy Engineering | Equipment structures, industrial frames | Grade C / D |
| Commercial Buildings | Stadiums, malls, high-rise frameworks | Grade B / C |
| Transport Equipment | Truck frames, trailers, rail components | Grade C |
| Signage & Towers | Billboards, monopoles, transmission masts | Grade D |
| Fabrication & OEM | Machinery frames, modular fabrication | Grade B / C |
ASTM A500’s versatility makes it suitable for load-bearing, architectural, and high-strength engineering applications.
Export Readiness & Packaging
Inox Steel India exports ASTM A500 HSS to 40+ countries, providing consistent quality for international structural steel requirements.
Export Packaging Includes
Major Export Markets
USA • Canada • Mexico • UAE • Saudi Arabia • Qatar • Oman
South Africa • Kenya • Nigeria • Egypt
Singapore • Australia • Malaysia • Philippines
We supply MTCs, NDT reports, and required compliance documents for global projects.
Grade D (50 ksi yield) is the highest strength grade, suitable for heavy structural applications. Yes. A500 HSS has excellent weldability due to controlled chemistry and ERW seam quality. Square, Rectangular, and Round Hollow Structural Sections (HSS). Yes, we supply to multiple North American fabrication and construction companies with complete documentation. Yes. GI, HDG, epoxy, and fire-resistant coatings are available. Which ASTM A500 grade is the strongest?
Are ASTM A500 tubes suitable for welding and fabrication?
What shapes are available under ASTM A500?
Do you export ASTM A500 to the USA and Canada?
Can these sections be galvanized or coated?