Black Round Bars are hot-rolled steel bars with a dark oxide finish produced from mild steel, carbon steel, or alloy steel. They are widely used in structural, mechanical, and industrial applications due to their durability, strength, and cost-effectiveness. Riddhi Siddhi Impex is a trusted manufacturer and domestic supplier of Black Round Bars across India, offering high-quality products to meet diverse industrial requirements..
Riddhi Siddhi Impex provides Black Round Bars in various material grades including mild steel (IS 2062), carbon steel (C45, C55), and alloy steel. These bars are suitable for applications where high strength and structural integrity are required. Multiple grades ensure that customers can choose bars according to their specific mechanical and chemical property needs..
Black Round Bars are manufactured by hot rolling billets through rolling mills, followed by cooling under controlled conditions to achieve required mechanical properties. The black oxide layer naturally forms during hot rolling, providing minimal corrosion resistance. Riddhi Siddhi Impex ensures quality through dimensional checks, surface inspections, and mechanical testing, ensuring the bars meet international and Indian standards...
Due to their strength and durability, Black Round Bars are widely used in construction for beams, rods, and reinforcements, as well as in manufacturing components such as shafts, bolts, axles, and machinery parts. They are also used in automotive, agricultural, and general engineering industries, providing a cost-effective solution for heavy-duty applications..
Riddhi Siddhi Impex offers Black Round Bars in customized diameters, lengths, and grades to meet specific project requirements. Value-added services include cutting, straightening, and surface treatments. These services allow industries to receive bars ready for immediate use, reducing project timelines and improving manufacturing efficiency..
| Product Name | Black Round Bar |
|---|---|
| Manufacturer | Riddhi Siddhi Impex |
| Material | Mild Steel (IS 2062), Carbon Steel (C45, C55), Alloy Steel |
| Standard | IS, ASTM, DIN, JIS |
| Finish | Hot Rolled Black Surface |
| Diameter Range | 8 mm to 150 mm |
| Length | 3,000 mm / 6,000 mm / Custom |
| Applications | Construction, Machinery Components, Shafts, Bolts, Axles, Industrial Fabrication |
| Grade | C (%) | Mn (%) | Si (%) | P (%) | S (%) |
|---|---|---|---|---|---|
| IS 2062 / Mild Steel | 0.20-0.25 | 0.60-1.00 | 0.15-0.35 | 0.05 Max | 0.05 Max |
| C45 | 0.42-0.50 | 0.50-0.80 | 0.17-0.37 | 0.05 Max | 0.05 Max |
| C55 | 0.52-0.60 | 0.60-0.90 | 0.17-0.37 | 0.05 Max | 0.05 Max |
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| IS 2062 / Mild Steel | 250-410 | 410-550 | 20-25 | 120-180 |
| C45 | 350 | 580-680 | 16-18 | 170-210 |
| C55 | 410 | 620-720 | 14-16 | 190-220 |
| Diameter (mm) | Length (mm) |
|---|---|
| 8-20 | 3,000 / 6,000 / Custom |
| 25-50 | 3,000 / 6,000 / Custom |
| 60-100 | 3,000 / 6,000 / Custom |
| 110-150 | 3,000 / 6,000 / Custom |
| Indian Grade | ASTM | DIN | JIS |
|---|---|---|---|
| IS 2062 | A36 | St 37-2 | S25C |
| C45 | 1045 | C45 | S45C |
| C55 | 1055 | C55 | S55C |
| Standard | Description |
|---|---|
| IS 2062 | Hot Rolled Medium and High Tensile Steel Bars for Structural Applications |
| ASTM A36 | Standard Specification for Structural Steel |
| DIN St37-2 | German Standard for Carbon Steel Structural Bars |
| JIS S25C | Japanese Industrial Standard for Carbon Steel Round Bars |
| Type | Description |
|---|---|
| Hot Rolled Round Bars | Rough surface bars for structural and mechanical applications |
| Cold Drawn Round Bars | Precision bars with smooth finish and tight tolerances |
| Forged Round Bars | High-strength bars for critical industrial components |
| Peeled Round Bars | Surface peeled bars for precision machining |
| Bright Drawn Round Bars | High-precision, polished round bars |
| Centerless Ground Round Bars | Precision bars with excellent roundness and surface finish |
Beyond major metros, Riddhi Siddhi Impex also caters to Tier-2 and Tier-3 cities including Nagpur, Indore, Bhopal, Jaipur, Kanpur, Lucknow, Agra, Varanasi, Amritsar, Chandigarh, Mysuru (Mysore), Udaipur, Jodhpur, Visakhapatnam, Coimbatore, Madurai, Kochi, Thiruvananthapuram, Mangalore, Nashik, Kolhapur, Chandrapur, Akola, Vilayat, Somnath, Dahej, Narmada, Ankleshwar, Navsari, Valsad, and Rajpipla, ensuring comprehensive domestic coverage..
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