Manufacturer, Supplier & Exporter of Hollow Round Bar
A Hollow Round Bar (sometimes also referred to as hollow bar stock or hollow bar tubing) is a cylindrical steel bar with a hollow center — essentially a tube with uniform wall thickness. This geometry makes it lighter than solid round bars of equivalent outer diameter, while retaining substantial strength and structural integrity. Riddhi Siddhi Impex offers high-quality hollow round bars manufactured as per industrial standards, catering to a wide variety of engineering and industrial requirements across India...
At Riddhi Siddhi Impex, Hollow Round Bars are available in several materials depending on the application — including carbon steel, alloy steel, stainless steel (such as SS 304, SS 316, SS 410, etc.), and special alloy or high-strength steel grades. This variety enables use in general fabrication, corrosion-sensitive environments, heavy machinery, structural components, and specialized industrial conditions. The availability of different grades ensures the product meets varying requirements for strength, corrosion resistance, weldability, and machinability.
Manufacturing a hollow round bar typically involves piercing a solid billet and then rolling or drawing it to achieve the desired outer diameter, inner diameter (bore), and wall thickness. Riddhi Siddhi Impex ensures the process adheres to strict quality control protocols: chemical composition checks, mechanical property verification, wall thickness uniformity, and surface/final finish inspection. The result is bars with uniform wall thickness, smooth outer and inner surfaces, precise dimensions, and consistent mechanical properties..
Hollow Round Bars offer a favorable strength-to-weight ratio. Because of their hollow structure, they provide substantial strength — enough for shafts, structural applications, or pressure-bearing parts — while reducing overall weight compared to solid bars. This weight reduction is beneficial in applications where inertia, fuel efficiency, or load reduction is critical (e.g. rotating shafts, drive components, automotive parts, etc.). Additionally, internal bore allows for internal fluid passage or cable/hydraulic routing, expanding their utility..
Due to their unique geometry and mechanical advantages, hollow round bars are used in a broad spectrum of industries. Common applications include drive shafts, axles, hydraulic and pneumatic cylinders, structural frames, scaffolding, mechanical and automotive components, furniture frames, shaft housings, and pipe-like structural members. Stainless or alloy versions are used in chemical, petrochemical, marine, and food-processing industries where corrosion resistance and hygiene are important..
Hollow Round Bar
Specification
| Product Name | Hollow Round Bar |
|---|---|
| Manufacturer | Riddhi Siddhi Impex |
| Material Grades | SS 304 / 304L / 316 / 316L / 321 / 310 / Alloy Steel / Carbon Steel / Duplex / Super Duplex |
| Standard | ASTM A276 / ASTM A479 / EN 10088 / DIN 17440 |
| Size Range | OD 10 mm to 600 mm |
| Wall Thickness | 1 mm to 50 mm |
| Length | 1 Meter to 6 Meter (Custom Cut Available) |
| Process | Seamless / Welded / Hot Rolled / Cold Drawn |
| Surface Finish | Bright / Black / Polished / Annealed |
| Applications | Automotive, Fabrication, Machinery, Construction, Structural Parts |
Chemical Composition (SS 304)
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.08 Max |
| Manganese (Mn) | 2.00 Max |
| Phosphorus (P) | 0.045 Max |
| Sulfur (S) | 0.030 Max |
| Silicon (Si) | 1.00 Max |
| Chromium (Cr) | 18.0 – 20.0 |
| Nickel (Ni) | 8.0 – 11.0 |
| Iron (Fe) | Balance |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 515 MPa |
| Yield Strength | ≥ 205 MPa |
| Elongation | ≥ 40% |
| Hardness | ≤ 201 HB |
| Density | 8.0 g/cm³ |
Dimension Chart (Nominal)
| Outer Diameter (OD mm) | Inner Diameter (ID mm) | Wall Thickness (mm) |
|---|---|---|
| 20 | 10 | 5 |
| 30 | 15 | 7.5 |
| 40 | 20 | 10 |
| 50 | 25 | 12.5 |
| 80 | 40 | 20 |
| 100 | 60 | 20 |
| 150 | 100 | 25 |
Equivalent Grades
| Standard | Grade |
|---|---|
| ASTM | 304 / 316 / 321 / 310 |
| UNS | S30400 / S31600 / S32100 / S31008 |
| EN | 1.4301 / 1.4401 / 1.4541 / 1.4845 |
| JIS | SUS 304 / SUS 316 / SUS 321 / SUS 310 |
Equivalent Standards
| Standard | Description |
|---|---|
| ASTM A276 | Hot & Cold Finished Stainless Steel Bars |
| ASTM A479 | Stainless Steel Bars for Pressure Vessels |
| EN 10088 | Stainless Steel Material Specifications |
| DIN 17440 | German Stainless Steel Standard |
Other Types of Round Bars
| Type | Description |
|---|---|
| Solid Round Bar | Fully solid round steel bars used in machining & construction |
| Hex Bar | 6-sided bars used in fasteners & precision components |
| Square Bar | Square profile bars for engineering and fabrication |
| Bright Bar | Cold drawn bars with smooth bright finish |
| Black Bar | Hot rolled bars with black oxide surface |
| Flat Bar | Rectangular profile bars for structural applications |
FAQ
| Question | Answer |
|---|---|
| What are the applications of Hollow Round Bars? | Used in automotive, fabrication, structural, machinery, and heavy engineering. |
| Do you offer customized OD/ID sizes? | Yes, custom sizes are manufactured as per drawings. |
| Which materials are available? | Stainless steel, carbon steel, alloy steel, duplex, and super duplex. |
| Are Hollow Bars corrosion resistant? | Yes, stainless steel grades offer excellent corrosion resistance. |
Riddhi Siddhi Impex offers customization of hollow round bars based on client requirements — custom outer diameter, inner bore size, wall thickness, length, and finish (hot rolled, cold drawn, polished). They also provide services such as cut-to-length, end-machining, internal bore finishing, and pre-inspection for client more precise requirements. This flexibility makes them suitable for both small-batch custom projects and large-scale industrial orders.
- Q1: What are the main applications of Hollow Round Bar?
- A1: Hollow Round Bars are widely used in structural engineering, automotive components, construction frameworks, machinery parts, furniture manufacturing, and general fabrication.
- Q2: Do you provide customized sizes and wall thicknesses?
- A2: Yes, we offer Hollow Round Bars in custom diameters, lengths, and wall thicknesses as per client requirements and industry standards.
- Q3: Are Hollow Round Bars corrosion-resistant?
- A3: Depending on the grade used, Hollow Round Bars provide excellent corrosion resistance. Stainless steel, alloy steel, and duplex grades offer superior resistance to rust and chemical environments.
- Q4: What material grades are available for Hollow Round Bar?
- A4: We supply Hollow Round Bars in Stainless Steel, Carbon Steel, Alloy Steel, Duplex Steel, Super Duplex, Nickel Alloys, Titanium, Copper Alloys, Aluminum, and custom grades on request.
Cities we have supplied our products to
Mumbai, Hollow Round Bar Suplier in Delhi, Hollow Round Bar Suplier in Bengaluru(Bangalore), Hollow Round Bar Suplier in Hyderabad, Hollow Round Bar Suplier in Chennai, Hollow Round Bar Suplier in Kolkata, Hollow Round Bar Suplier in Pune, Hollow Round Bar Suplier in Ahmedabad, Hollow Round Bar Suplier in Surat, Hollow Round Bar Suplier in Vadodara, Hollow Round Bar Suplier in Rajkot, Hollow Round Bar Suplier in Nagpur, Hollow Round Bar Suplier in Indore, Hollow Round Bar Suplier in Bhopal, Hollow Round Bar Suplier in Jaipur, Hollow Round Bar Suplier in Kanpur, Hollow Round Bar Suplier in Lucknow, Hollow Round Bar Suplier in Agra, Hollow Round Bar Suplier in Varanasi, Hollow Round Bar Suplier in Amritsar, Hollow Round Bar Suplier in Chandigarh, Hollow Round Bar Suplier in Mysuru (Mysore), Hollow Round Bar Suplier in Udaipur, Hollow Round Bar Suplier in Jodhpur, Hollow Round Bar Suplier in Visakhapatnam, Hollow Round Bar Suplier in Coimbatore, Hollow Round Bar Suplier in Madurai, Hollow Round Bar Suplier in Kochi, Hollow Round Bar Suplier in Thiruvananthapuram, Hollow Round Bar Suplier in Mangalore, Hollow Round Bar Suplier in Nagpur, Hollow Round Bar Suplier in Nashik, Hollow Round Bar Suplier in Kolhapur, Hollow Round Bar Suplier in Chandrapur, Hollow Round Bar Suplier in Akola, Hollow Round Bar Suplier in Vilayat, Hollow Round Bar Suplier in Somnath, Hollow Round Bar Suplier in Dahej, Hollow Round Bar Suplier in Vadodara, Hollow Round Bar Suplier in Narmada, Hollow Round Bar Suplier in Surat, Hollow Round Bar Suplier in Ankleshwar, Hollow Round Bar Suplier in Navsari, Hollow Round Bar Suplier in Valsad, Hollow Round Bar Suplier in Rajpipla, Hollow Round Bar Suplier in Veraval, Hollow Round Bar Suplier inKovvur, Hollow Round Bar Suplier in Andra Pradesh, Hollow Round Bar Suplier inKarwar, Hollow Round Bar Suplier in Karnataka, Hollow Round Bar Suplier inKosamba, Hollow Round Bar Suplier in Gujarat, Hollow Round Bar Suplier in Vishakapatnam, Hollow Round Bar Suplier in Shahad, Hollow Round Bar Suplier in Pondicherry, Hollow Round Bar Suplier in Kakkinada, Hollow Round Bar Suplier in Andra Pradesh, Hollow Round Bar Suplier in Nagda, Hollow Round Bar Suplier in Madhya Pradesh, Hollow Round Bar Suplier inHarihar, Hollow Round Bar Suplier in Karnataka, Hollow Round Bar Suplier in Tuticorin, Hollow Round Bar Suplier in Tamilnadu, Hollow Round Bar Suplier in Trivandrum, Hollow Round Bar Suplier in KeralaKurnool, Hollow Round Bar Suplier in Andra Pradesh, Hollow Round Bar Suplier in Rourkela, Hollow Round Bar Suplier in Hindupur, Hollow Round Bar Suplier in Orissa, Hollow Round Bar Suplier in Renukoot, Hollow Round Bar Suplier in Uttar Pradesh, Hollow Round Bar Suplier in Morbi, Hollow Round Bar Suplier in Kerala , Hollow Round Bar Suplier inHimachal, Hollow Round Bar Suplier in Dehradun, Hollow Round Bar Suplier in Visakhapatnam , Hollow Round Bar Suplier inJamnagar, Hollow Round Bar Suplier in Kozhikode, Hollow Round Bar Suplier in Pondicherry, Hollow Round Bar Suplier in Ludhiana, Hollow Round Bar Suplier inLatur, Hollow Round Bar Suplier in Nanded, Hollow Round Bar Suplier in Vijaywada, Hollow Round Bar Suplier in Alwar, Hollow Round Bar Suplier in Bareilly, Hollow Round Bar Suplier in Bikaner, Hollow Round Bar Suplier in Andheri, Hollow Round Bar Suplier in Marol, Hollow Round Bar Suplier in Taloja, Hollow Round Bar Suplier in Turbhe, Hollow Round Bar Suplier in TTC (Thane-Belapur), Hollow Round Bar Suplier in Pimpri-Chinchwad, Hollow Round Bar Suplier in Chakan, Hollow Round Bar Suplier in Talegaon, Hollow Round Bar Suplier in Ranjangaon, Hollow Round Bar Suplier in Jejuri, Hollow Round Bar Suplier in Baramati, Hollow Round Bar Suplier in Satpur, Hollow Round Bar Suplier in Ambad, Hollow Round Bar Suplier in Sinnar, Hollow Round Bar Suplier in Igatpuri, Hollow Round Bar Suplier in Shendra, Hollow Round Bar Suplier in Waluj, Hollow Round Bar Suplier in Chikalthana, Hollow Round Bar Suplier in Paithan, Hollow Round Bar Suplier in Hingna, Hollow Round Bar Suplier in Butibori, Hollow Round Bar Suplier in Kalmeshwar, Hollow Round Bar Suplier in Umred, Hollow Round Bar Suplier in Shiroli, Hollow Round Bar Suplier in Kagal, Hollow Round Bar Suplier in Gokul Shirgaon, Hollow Round Bar Suplier in Akkalkot, Hollow Round Bar Suplier in Chincholi, Hollow Round Bar Suplier in Lote-Parshuram, Hollow Round Bar Suplier in Dombivli, Hollow Round Bar Suplier in Ambernath, Hollow Round Bar Suplier in Mahad, Hollow Round Bar Suplier in Roha, Hollow Round Bar Suplier in Palghar, Hollow Round Bar Suplier in Tarapur (Boisar) and for inder national
Countries we have supplied our products to
South Korea, Hollow Round Bar Exporter in Africa, Hollow Round Bar Exporter in Sri Lanka, Hollow Round Bar Exporter in Syria, Hollow Round Bar Exporter in Taiwan, Hollow Round Bar Exporter in Tanzania, Hollow Round Bar Exporter in Tajikistan, Hollow Round Bar Exporter in Thailand, Hollow Round Bar Exporter in Turkey, Hollow Round Bar Exporter in Turkmenistan, Hollow Round Bar Exporter in Ukraine, Hollow Round Bar Exporter in United Kingdom, Hollow Round Bar Exporter in Arab Emirates (UAE), Hollow Round Bar Exporter in Uzbekistan, Hollow Round Bar Exporter in Vietnam, Hollow Round Bar Exporter in Yemen, Hollow Round Bar Exporter in France, Hollow Round Bar Exporter in Germany, Hollow Round Bar Exporter in Greece, Hollow Round Bar Exporter in Oman, Hollow Round Bar Exporter in Colombia, Hollow Round Bar Exporter in Portugal, Hollow Round Bar Exporter in Japan, Hollow Round Bar Exporter in Lithuania, Hollow Round Bar Exporter in Macau, Hollow Round Bar Exporter in Mongolia, Hollow Round Bar Exporter in Qatar, Hollow Round Bar Exporter in Ireland, Hollow Round Bar Exporter in Malaysia, Hollow Round Bar Exporter in Bangladesh, Hollow Round Bar Exporter in Russia, Hollow Round Bar Exporter in Iran, Hollow Round Bar Exporter in Jordan, Hollow Round Bar Exporter in Singapore, Hollow Round Bar Exporter in Bulgaria, Hollow Round Bar Exporter in Poland, Hollow Round Bar Exporter in Denmark, Hollow Round Bar Exporter in Nigeria, Hollow Round Bar Exporter in Gambia, Hollow Round Bar Exporter in Indonesia, Hollow Round Bar Exporter in Finland, Hollow Round Bar Exporter in Argentina, Hollow Round Bar Exporter in Chile, Hollow Round Bar Exporter in Spain, Hollow Round Bar Exporter in Peru, Hollow Round Bar Exporter in Kuwait, Hollow Round Bar Exporter in India, Hollow Round Bar Exporter in Saudi Arabia, Hollow Round Bar Exporter in Slovakia, Hollow Round Bar Exporter in Slovenia, Hollow Round Bar Exporter in Sweden, Hollow Round Bar Exporter in Switzerland, Hollow Round Bar Exporter in Bahrain, Hollow Round Bar Exporter in the Netherlands, Hollow Round Bar Exporter in United Kingdom, Hollow Round Bar Exporter in Mexico, Hollow Round Bar Exporter in Bulgaria, Hollow Round Bar Exporter in Spain, Hollow Round Bar Exporter in France, Hollow Round Bar Exporter in Germany, Hollow Round Bar Exporter in Colombia, Hollow Round Bar Exporter in Brazil, Hollow Round Bar Exporter in Saudi Arabia, Hollow Round Bar Exporter in Iraq, Hollow Round Bar Exporter in Iran, Hollow Round Bar Exporter in Sudan, Hollow Round Bar Exporter in Libya, Hollow Round Bar Exporter in Tanzania, Hollow Round Bar Exporter in Nigeria, Hollow Round Bar Exporter in New Zealand, Hollow Round Bar Exporter in Paris, Hollow Round Bar Exporter in Switzerland
