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Girgaon, Mumbai - 400004
Hollow Bar Manufacturer, Supplier & Exporter in India
Hollow Bar Manufacturers in India
Kamal Steels is a leading Hollow Bar Manufacturer in Mumbai, supplying high-quality hollow bars for industrial, engineering and structural applications. Established in 1984, we have extensive experience in manufacturing, stocking, supplying and exporting precision-engineered hollow bars across domestic and international markets.
As a trusted Hollow Bar Supplier in India, we maintain a wide range of hollow bars in various materials, sizes, wall thicknesses and specifications to meet diverse industrial requirements. Our hollow bars are widely used in machining, hydraulic cylinders, mechanical engineering, construction, automotive and heavy equipment industries.
We are also a reliable Hollow Bar Exporter, supplying premium-quality hollow bar products to global markets with export-grade packaging and strict quality control standards. Every product is manufactured using high-grade raw materials and advanced production technology to ensure superior performance, dimensional accuracy and long service life.
Kamal Steels is a certified ASTM Hollow Bar Supplier, offering products manufactured as per international ASTM and ASME standards. These hollow bars are widely used in applications requiring excellent machinability, high strength and reliable structural performance.
Our Hollow Bars are manufactured using premium quality raw materials and advanced manufacturing processes to ensure outstanding durability, corrosion resistance, strength and precision finish. Every hollow bar undergoes strict quality testing and inspection to deliver reliable industrial performance in demanding operating conditions.
Why Hollow Bars?
Hollow bars are precision-engineered tubular products widely used in machining, engineering and industrial applications requiring high strength, durability and dimensional accuracy. These bars provide excellent machinability, superior structural integrity and efficient material utilization for various manufacturing processes.
Hollow bars are preferred for applications where reduced machining time, lower material wastage and reliable mechanical performance are important. Their uniform wall thickness, smooth internal surface and excellent mechanical properties make them suitable for hydraulic cylinders, machine components, construction equipment, automotive parts and general engineering industries.
Why Choose Kamal Steels?
- Manufacturer & Stockist Since 1984
- Large Ready Stock Available
- ASTM & ASME Standard Hollow Bars
- Third Party Inspection
- Mill Test Certificates Provided
- PAN India & Export Supply
- Competitive Prices
- Fast Delivery Support
Types of Hollow Bars
- Seamless Hollow Bars
- Welded Hollow Bars
- Precision Machined Hollow Bars
- Hydraulic Cylinder Hollow Bars
Hollow Bar Equivalent Grades
| Material | UNS Number | Werkstoff No. |
|---|---|---|
| Carbon Steel Hollow Bar | A105 | 1.0460 |
| Stainless Steel Hollow Bar 304 | S30400 | 1.4301 |
| Stainless Steel Hollow Bar 316 | S31600 | 1.4401 |
Hollow Bar Pressure Ratings & Schedule
Surface Finish & End Types
- Hot Rolled Finish
- Cold Drawn Finish
- Turned & Polished Finish
- Annealed Finish
- Plain End
- Beveled End
- Threaded End
Advantages of Hollow Bars
- High Strength-to-Weight Ratio
- Excellent Machinability for Precision Components
- Reduced Material Wastage During Machining
- Uniform Wall Thickness and Structural Stability
- Suitable for Hydraulic and Mechanical Applications
- Good Wear and Fatigue Resistance
- Long Service Life in Industrial Conditions
- Cost-Effective for Heavy Engineering Use
Hollow Bar Weight Chart
Hollow Bar Weight Calculator
Result: 0 kg
Hollow Bar Specifications
| Specification | Details |
|---|---|
| Product Name | Hollow Bar |
| Materials | Carbon Steel, Alloy Steel, Stainless Steel |
| Type | Seamless / Machined Hollow Bar |
| Size Range | 20 mm to 500 mm |
| Wall Thickness | As per requirement / Customized |
| Length | Single Random / Double Random / Cut Length |
| Standards | ASTM A511, ASTM A519, EN 10294 |
| End Finish | Plain End, Beveled End, Machined End |
Chemical Composition of Hollow Bar
| Grade | Carbon (C) | Manganese (Mn) | Chromium (Cr) | Other Elements |
|---|---|---|---|---|
| Carbon Steel | 0.15 – 0.45 | 0.30 – 1.00 | — | Fe Balance |
| Alloy Steel | 0.20 – 0.50 | 0.50 – 1.20 | 0.40 – 2.00 | Mo, Ni, Fe Controlled |
| Stainless Steel | ≤ 0.08 | ≤ 2.00 | 10.5 – 18.0 | Ni, Mo, Fe Balanced |
Hollow Bar Size Chart & Dimensions
Hollow bars are available in a wide range of sizes and wall thicknesses suitable for hydraulic, machining and engineering applications.
| Outer Diameter (OD) | Bore (ID) | Wall Thickness | Weight (Approx.) |
|---|---|---|---|
| 30 mm | 10 mm | 10 mm | — |
| 50 mm | 20 mm | 15 mm | — |
| 80 mm | 40 mm | 20 mm | — |
| 120 mm | 60 mm | 30 mm | — |
| 200 mm | 100 mm | 50 mm | — |
Hollow Bar Standards
| ASTM Standards | EN Standards |
|---|---|
| ASTM A511 | EN 10294 |
| ASTM A519 | EN 10297 |
Mechanical Properties of Hollow Bar
Tensile Strength
Hollow bars provide high tensile strength suitable for heavy-duty machining and structural applications.
Yield Strength
They offer excellent yield strength ensuring stability under load and pressure conditions.
Elongation
Good elongation ensures ductility and ease of machining into complex components.
| Material | Tensile Strength (MPa, Min) | Yield Strength (MPa, Min) | Elongation (% Min) |
|---|---|---|---|
| Carbon Steel | 400 – 600 | 250 – 350 | 15% |
| Alloy Steel | 600 – 900 | 350 – 600 | 12% |
| Stainless Steel | 520 – 750 | 205 – 450 | 40% |
Features of Hollow Bar
- High Strength and Rigidity: Hollow bars offer excellent mechanical strength and rigidity, making them suitable for heavy-duty machining and structural applications.
- Weight Reduction Advantage: Due to their hollow design, they reduce overall component weight without compromising strength.
- Excellent Machinability: Hollow bars are easy to machine into precise components, reducing material wastage and production time.
- Uniform Material Quality: Manufactured with consistent wall thickness and material integrity for reliable performance.
- High Pressure Resistance: Suitable for hydraulic and mechanical applications requiring pressure-bearing capability.
- Good Corrosion Resistance: Depending on material grade, hollow bars offer resistance against corrosion in industrial environments.
- Reduced Material Wastage: Ideal for deep machining applications, minimizing scrap generation.
- Long Service Life: Designed for durability and consistent performance in demanding industrial applications.
Applications of Hollow Bar
Hollow bars are widely used in engineering and industrial applications where high strength, precision machining and weight optimization are required.
Hydraulic Systems
Used in hydraulic cylinders and systems requiring pressure resistance and precision performance.
Heavy Engineering
Ideal for manufacturing heavy-duty mechanical components and structural parts.
Automotive Industry
Used in automotive components requiring strength, accuracy and reduced weight.
Machine Tools
Widely used in machine tool manufacturing for precision-engineered parts.
Engineering Components
Suitable for shafts, bushings and other machined engineering components.
Oil & Gas Industry
Used in high-pressure and demanding environments in oil and gas operations.
Aerospace Industry
Applied in aerospace structures where lightweight and strength are critical.
Fabrication Industry
Used in fabrication projects requiring easy machining and structural reliability.
Industries We Serve
Kamal Steels supplies hollow bars to industries requiring precision, strength, reduced weight and high machining efficiency.
Hydraulic Industry
Widely used in hydraulic cylinders and fluid power systems.
Engineering Industry
Used in general and heavy engineering applications for machined components.
Automotive Industry
Applied in vehicle components requiring strength and weight optimization.
Manufacturing Industry
Used in production of precision-machined industrial parts.
Oil & Gas Industry
Suitable for high-pressure and demanding operational environments.
Aerospace Industry
Used in aerospace systems requiring high strength-to-weight ratio.
Fabrication Industry
Ideal for structural fabrication and custom engineering solutions.
Machine Tool Industry
Used in machine tool components and precision equipment manufacturing.
Packaging, Testing & Inspection
Packaging
- Wooden Box Packing: Hollow bars are securely packed in wooden boxes for safe export and transportation.
- Bundle Packing: Bars are bundled properly to ensure safe handling and storage.
- Protective Wrapping: Surface protection is provided to avoid scratches and damage.
- Export Standard Packaging: Packaging is done as per international export guidelines for global delivery.
Testing & Inspection
- Ultrasonic Testing: Detects internal defects and ensures material integrity.
- Dimensional Inspection: Ensures accurate size, wall thickness and tolerance compliance.
- Hardness Testing: Verifies mechanical strength and material grade.
- Hydrostatic Testing: Confirms pressure-bearing capability where applicable.
- Visual Inspection: Ensures surface finish and overall product quality.
- Third Party Inspection: Independent agencies verify quality standards and compliance.
Frequently Asked Questions
A Hollow Bar is a steel bar with a central hole (bore) designed for machining and engineering applications. It helps reduce machining time and material wastage.
Hollow bars are widely used in hydraulic cylinders, machine tools, automotive components, engineering equipment and heavy industrial applications.
Hollow bars are commonly manufactured from carbon steel, alloy steel and stainless steel depending on application requirements and operating conditions.
They offer reduced machining time, lower material wastage, high strength, good dimensional accuracy and cost-effective production.
Yes, hollow bars are suitable for high-pressure applications such as hydraulic systems, depending on grade, wall thickness and manufacturing standards.
Yes, hollow bars are designed for excellent machinability, allowing easy fabrication into precise components with minimal material loss.
They are widely used in hydraulic, automotive, aerospace, engineering, oil & gas, machine tools and manufacturing industries.
The main benefit is weight reduction and reduced machining time while maintaining required strength and performance.
Yes, hollow bars are available in a wide range of diameters, wall thicknesses and lengths based on industrial requirements.
Hollow bars are preferred for their efficiency in machining, cost savings, structural strength and suitability for precision engineering applications.