Leading Supplier, Stockist and Exporter of Round Bars
BB Infras is a recognised supplier, stockist and exporter of round bars for machining, fabrication, forging and structural applications across industries including automotive, oil & gas, aerospace, tooling, and general engineering. We maintain extensive stock in a wide range of diameters, lengths and material grades at our Mumbai warehouse.
Our round bar inventory covers bright drawn, hot rolled, cold drawn, peeled and ground finish bars in diameters from 6 mm to 500 mm and lengths from 3 m to 7 m. Cut-to-length, turned, and polished bars are available to specific customer requirements.
Materials available include Mild Steel (IS 2062), Carbon Steel (EN8, EN8D, EN9, C45, AISI 1020/1045), Alloy Steel (EN19, EN24, EN36C, AISI 4140, 4340, 8620), Stainless Steel (AISI 304/316/410/420/431/440C, ASTM A276/A479), Tool Steel (H13, D2, O1), Nickel Alloys (Inconel 625/718, Monel 400) and Titanium.
Round Bar Grades and Specifications
| Grade | Standard | Typical Application |
|---|---|---|
| EN8 / EN8D (AISI 1040) | BS 970 / IS 1570 | Shafts, axles, gears, couplings |
| EN19 (AISI 4140) | BS 970 / IS 1570 | High-strength shafts, studs, bolts |
| EN24 (AISI 4340) | BS 970 / IS 1570 | High-impact shafts, connecting rods |
| C45 / EN43 | DIN 17200 / IS 1570 | Gears, spindles, machine components |
| AISI 304 / 304L | ASTM A276 / A479 | Food, pharmaceutical, chemical |
| AISI 316 / 316L | ASTM A276 / A479 | Marine, chemical, high-corrosion |
| H13 Tool Steel | AISI H13 / W.-Nr. 1.2344 | Hot work dies, extrusion tooling |
| Inconel 625 | UNS N06625 / AMS 5666 | Aerospace, subsea, high-temperature |
Frequently Asked Questions
- Q: What is the difference between EN8 and EN19?
- A: EN8 is a medium carbon steel (AISI 1040) used for general-purpose shafts and axles. EN19 (AISI 4140) is a Cr-Mo alloy steel with higher strength and toughness, used for critical components requiring heat treatment to 850–1000 MPa tensile strength.
- Q: Do you supply heat-treated bars?
- A: Yes — bars are available in annealed, normalised, quenched & tempered (Q&T) and hardened & tempered (H&T) conditions. Hardness reports and heat treatment certificates are provided.
- Q: What is the minimum order quantity?
- A: Typically 50 kg for standard grades in stock. Custom heat treatment, special lengths or exotic alloys may require higher MOQ — contact us for details.
