Nicorex Alloys is an ISO 9001 and ISO 14001 certified supplier and stockist of round bars across nickel alloy, duplex, super duplex and speciality steel grades based in Mumbai, India.
A round bar is a solid cylindrical metal product made from billets by hot rolling, forging or cold drawing. In the metals trade, a bar is a straight length with controlled diameter tolerances for machining. A rod is a smaller-diameter round product under 25 mm. We stock bars and rods in many alloys, including Hastelloy C276, C22 and C2000, Inconel 600, 625 and 718, Incoloy 800, 800H, 800HT and 825, Monel 400 and K500, Nickel 200 and 201, Nimonic 75, 80A and 90, XM-19 or Nitronic 50, Alloy 20, Duplex S31803 or S32205 and Super Duplex S32750 or S32760. We stock hot rolled black bars, cold drawn bright bars, centreless ground bars, peeled bars and forged bars. Every bar is supplied with EN 10204/3.1B mill test certificates and PMI reports. Each order comes with full material traceability from mill to dispatch.
Our round bars are available from 3 mm to 500 mm in diameter, with custom forged bars up to 800 mm. Lengths range from 1 m to 6 m in random or fixed sizes, and we also offer customisation to your required length. We offer h6, h7, h9, and h11 tolerances, with black, bright, or ground finishes.
Round Bar Material Grades
Hastelloy Round Bar:
Inconel Round Bar:
Monel Round Bar:
Nickel Round Bar:
NIMONIC Round Bars:
XM19 / NITRONIC 50 Round Bars:
Duplex Steel Round Bar:
Super Duplex Steel Round Bar:
Round Bar Specification
| Parameter | Details |
|---|---|
| Standard | ASTM, ASME, EN, DIN, JIS, AMS |
| Diameter | 3 mm to 500 mm (forged up to 800 mm) |
| Length | 1 m to 6 m (random or fixed), cut-to-length |
| Shape | Round, Hex, Square, Flat |
| Form | Hot Rolled, Cold Drawn, Ground, Peeled, Rough Turned, Forged |
| Tolerance | h6, h7, h9, h11 per ISO 286-2 |
| Condition | As-rolled, Annealed, Solution Annealed, Age Hardened, Cold Worked |
ASTM/ASME Standard for Bar and Rod:
| Material | ASTM | ASME | Note |
|---|---|---|---|
| Inconel 600/601 | B166 | SB166 | Ni-Cr-Fe bar |
| Inconel 625 | B446 | SB446 | Ni-Cr-Mo-Cb bar |
| Inconel 718 | B637 | SB637 | Precipitation hardened |
| Incoloy 800/800H/800HT | B408 | SB408 | Ni-Fe-Cr bar |
| Incoloy 825 | B425 | SB425 | Ni-Fe-Cr-Mo-Cu bar |
| Hastelloy C276/C22/C2000 | B574 | SB574 | Ni-Cr-Mo bar |
| Monel 400 / K500 | B164 / B865 | SB164 / SB865 | Ni-Cu bar |
| Nickel 200/201 | B160 | SB160 | Pure Ni bar |
| Alloy 20 | B473 | — | N08020 |
| Alloy 904L | A276 | — | N08904 |
| Duplex / Super Duplex | A276 + A479 | SA479 | A276 = shapes; A479 = PV |
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Round Bar Tolerance Chart
| Nominal Dia (mm) | h6 (mm) | h7 (mm) | h9 (mm) | h11 (mm) |
|---|---|---|---|---|
| 3–6 | −0.008 | −0.012 | −0.030 | −0.075 |
| 6–10 | −0.009 | −0.015 | −0.036 | −0.090 |
| 10–18 | −0.011 | −0.018 | −0.043 | −0.110 |
| 18–30 | −0.013 | −0.021 | −0.052 | −0.130 |
| 30–50 | −0.016 | −0.025 | −0.062 | −0.160 |
| 50–80 | −0.019 | −0.030 | −0.074 | −0.190 |
| 80–120 | −0.022 | −0.035 | −0.087 | −0.220 |
| 120–180 | — | −0.040 | −0.100 | −0.250 |
Available Bar Shapes
Nicorex stocks round bars, hex bars, square bars, flat bars, threaded bars, hollow bars, bright bars, black bars, and forged bars across nickel alloy, duplex, super duplex, and speciality steel grades.
Round Bar
Round Bar is used for shafts, studs, valve stems, and fastener blanks. We supply these bars in many diameters and in hot rolled, cold drawn, ground or forged form.
Rod
Rod is a smaller round bar, usually under 25 mm in diameter. Found in straight lengths for small machined parts, it is further processed for wire rods.
Hex Bar
Hex Bar has six flat sides and is supplied in sets across flat sizes and used to make bolt heads, nuts, and various fittings.
Square Bar
Square bar has four equal sides and sharp corners and is used for brackets, keys, small frames, and parts needing a flat bearing surface.
Flat Bar
Flat Bar: A flat rectangular bar with thickness from 3 mm to 50 mm and width from 10 mm to 200 mm, suited for wear strips and base plates.
Threaded Bar
Threaded Bar has threads along its full length, available in metric sizes from M8 to M100. It is used for bolting parts all the way through and for making custom studs.
Hollow Bar
Hollow Bar is a smooth, hollow tube with an outer diameter of 20 to 300 mm that is used for bushings, valve bodies, and other cylindrical parts to reduce internal work.
Bright Bar
Bright Bar is a cold-drawn or centreless ground bar with a clean, oxide-free surface, supplied in h9 or h11 diameter tolerance as per ISO 286-2.
Black Bar
Black Bar is a hot-rolled round bar with a dark, scaled surface applied in conditions where surface finish is not critical before machining.
Forged Bar
Forged Bar is produced by open-die forging. Applied to large, stressed components that need high strength, and sound internal quality.
Round Bar Weight Calculation
| Consumable Type | Storage Condition | Exposure Limit | Re-Baking |
|---|---|---|---|
| Low-H Electrodes (ENiCrMo, E7018, E8018) | Holding oven 100-150°C | Max 4 hr atmosphere | Re-bake 350–400°C x 1–2 hr |
| Rutile Electrodes (E308L-16, E309L-16) | Dry, below 60% humidity | Sealed packaging | Not required |
| TIG Rod | Dry, sealed tube | Sealed packaging | Not required |
| MIG Wire | Sealed bag with desiccant | Sealed packaging | Not required |
| Flux Core Wire | Sealed, dry storage | Sealed packaging | Not required |
| SAW Flux | Sealed; oven-dry before use | Reseal after opening | Dry per manufacturer spec |
Sealed consumables carry a shelf life of 2 to 5 years. Opened low-hydrogen electrodes must be used within 4 to 8 hours or re-baked per AWS A5.11 and AWS D1.1 requirements. Damaged packaging means the consumable must not be used.
Industrial Applications of Round Bars
Round bars are used in many industries to machine strong and corrosion-resistant parts. The right material is chosen based on temperature, pressure and the type of corrosive environment.
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Valve and Pump Components: Used to make valve stems, bodies, pump shafts, impellers, and wear rings. Monel 400 handles HF acid; Inconel 625 is preferred for subsea use.
- Fasteners - Studs, Bolts, Nuts, Threaded Bars: Round bars are turned into studs, hex bolts, U-bolts and threaded rods on CNC lathes. Inconel 718 suits aerospace; Monel K500 suits marine fasteners.
- Oil & Gas - Wellhead, Downhole, Subsea: Used for wellhead stems, downhole mandrels, and subsea connectors. Inconel 625 and 718 can be supplied for NACE-Compliant sour service, provided it meets the required hardness and material condition requirements.
- Chemical & Petrochemical - Reactor Internals: Round bars are used for agitator shafts, tie rods, and thermowells. Hastelloy C276/C22 handle mixed acids; Alloy 20 suits sulfuric acid; Incoloy 825 resists phosphoric acid.
- Power Generation & Nuclear: Applied for turbine bolting, hanger rods, and reactor internals. Inconel 718 suits gas turbine discs; Inconel 600 performs well in nuclear environments.
- Marine & Offshore: Used for propeller shafts, rudder stocks and pump shafts. Monel K500 gives high strength and non-magnetic behaviour, and super duplex is used for offshore bolting.
- Aerospace & Defence: Round bars are used in turbine discs, landing gear bolts and engine mount fasteners. Inconel 718 offers very high strength, with tensile strength that can reach around 1240 MPa in age-hardened condition.
How to Order Round Bars from Nicorex Alloys
- Material Grade + ASTM Spec
- Diameter (mm) + Tolerance Class (h6/h7/h9/h11)
- Length: fixed or random (1–6 m)
- Form: HR / CD / Ground / Peeled / Forged
- Shape: Round / Hex / Square / Flat
- Condition: Annealed / Age Hardened / As-Rolled
- Quantity: pieces, kg, or MT
- Additional: NACE MR0175, UT, AMS spec
- Documentation: MTC 3.1, PMI, TPI + Packaging