Hastelloy Round Bar Supplier in India — C276, C22, B2 & X
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Aashish Metals is a trusted stockist and supplier of Hastelloy round bars in India, maintaining ready inventory of Hastelloy C276, C22, B2, and X in round, hex, square, flat, and forged bar forms from our Mumbai facility. Our Hastelloy round bars are precision-manufactured from premium-grade nickel-based superalloy raw materials conforming to ASTM B574 / ASME SB574 and ASTM B166 / ASME SB166, and are available in diameters from 3 mm to 500 mm, lengths from 100 mm to 3,000 mm (and above on request), in hot rolled, cold drawn, forged, and annealed conditions. Used in applications as diverse as pump shafts, valve stems, fastener blanks, machined components, and structural elements in the chemical, oil & gas, pharmaceutical, aerospace, and power generation industries, Hastelloy round bars deliver a combination of high-temperature strength, corrosion resistance, and machinability that no standard stainless steel grade can match. Our Hastelloy C276 round bars and Hastelloy C22 round bars are available ex-stock. Contact us today for competitive pricing and fast delivery.
What Is a Hastelloy Round Bar?
A Hastelloy round bar is a solid, long-product form of nickel-based superalloy, produced by hot rolling, cold drawing, or forging from a primary billet or ingot. Hastelloy alloys are nickel-chromium-molybdenum systems (with optional tungsten and cobalt additions) that deliver remarkable resistance to corrosion, high-temperature oxidation, and stress-corrosion cracking in environments where conventional stainless steels rapidly fail. Round bars are the raw material of choice for machined components — valve bodies, pump shafts, impellers, fastener blanks, structural pins, and precision instrument parts — in corrosive process industries.
Aashish Metals stocks four primary Hastelloy grades in bar form:
Hastelloy Hastelloy Round Bar Grades
Hastelloy C276 Round Bar
Hastelloy C276 (UNS N10276 / Werkstoff Nr. 2.4819) is the most widely specified corrosion-resistant alloy globally. With 15–17% molybdenum and ~3.7% tungsten, it resists both oxidising and reducing environments — sulphuric acid, hydrochloric acid, wet chlorine, and seawater — with equal competence. Our Hastelloy C276 round bars are the top-selling grade and are available from stock in a wide diameter range.
Hastelloy C22 Round Bar
Hastelloy C22 (UNS N06022 / Werkstoff Nr. 2.4602) has higher chromium (20–22.5%), giving it superior oxidising acid resistance and performance in mixed-acid environments. Our Hastelloy C22 round bars are specified for pharmaceutical reactor shafts, FGD system components, and precision valve internals.
Hastelloy B2 Round Bar
Hastelloy B2 (UNS N10665 / Werkstoff Nr. 2.4617) has the highest molybdenum content (26–30%) of the C-family, making it unrivalled for resisting hydrochloric acid, sulphuric acid (non-oxidising concentrations), and acetic acid. Our Hastelloy B2 round bars are essential for HCl plant equipment.
Hastelloy X Round Bar
Hastelloy X (UNS N06002 / Werkstoff Nr. 2.4665) is the high-temperature specialist of the family — rated up to 1,204 °C (2,200 °F). Its combination of oxidation resistance and high-temperature strength makes it the first choice for aerospace gas turbine components, combustion chambers, and industrial furnace parts.
Technical data
Hastelloy Round Bar Specification
| Parameter | Details |
|---|---|
| Standard | ASTM B574 / ASME SB574, ASTM B166 / ASME SB166 |
| Dimensional standards | EN, DIN, JIS, ASTM, BS, ASME, AISI |
| Grades available | Hastelloy C276, C22, B2, B3, X |
| Round bar size (diameter) | 3 mm to 500 mm |
| Diameter range | 0.1 mm to 100 mm |
| Length | 100 mm to 3,000 mm (Long & Above) |
| Round bar size (flat) | 2 mm – 100 mm thickness |
| Square bar size | 4 mm – 100 mm |
| Hex bar size | 2 mm – 100 mm (A/F) |
| Angle bar | 3° × 20° × 20° × 12° × 100° × 100 |
| Finish | Black, Bright Polished, Rough Turned, No.4, Matt Finish, BA Finish, Peeled, Hairline, Mirror |
| Condition | Hot Rolled, Cold Drawn, Annealed, Forged, Hardened & Tempered, Precipitation Hardened |
| Tolerance | H8, H9, H10, H11, H12, H13K9, K10, K11, K12 or as per client's requirement |
| Hardness | 230 HB (typical) |
| Temperature range | 1,600 °F to 2,150 °F (depending on grade) |
| Form | Round, Square, Hex (A/F), Rectangle, Billet, Ingot, Forging, Threaded, Flat, Half Round, Triangle |
| Test certificates | Mill Test Certificate (MTC), Third-Party Inspection Report, PMI Test, Moisture Testing Report |
| Payment terms | LC (Letter of Credit), TT (Telegraphic Transfer), Cheque |
| Port of dispatch | Mumbai or Kalamboli (Maharashtra, India) |
Hastelloy Round Bar Chemical Composition
| Element | Hastelloy C276 | Hastelloy C22 | Hastelloy B2 | Hastelloy X |
|---|---|---|---|---|
| C (Carbon) | 0.010 max | 0.010 max | 0.02 max | 0.05–0.15 |
| Mn (Manganese) | 1.00 max | 0.50 max | 1.0 max | 1.00 max |
| Si (Silicon) | 0.08 max | 0.08 max | 0.1 max | 1.00 max |
| S (Sulphur) | 0.03 max | 0.02 max | 0.03 max | 0.03 max |
| Co (Cobalt) | 2.50 max | 2.50 max | 1.0 max | 0.50–2.50 |
| Ni (Nickel) | 50.99 min | 50.015 min | Balance | Balance |
| Cr (Chromium) | 14.50–16.50 | 20.00–22.50 | 1.0 max | 20.50–23.00 |
| Fe (Iron) | 4.00–7.00 | 2.00–6.00 | 2.0 max | 8.00–10.00 |
| Mo (Molybdenum) | 15.00–17.00 | 12.50–14.50 | 26–30 | 17.00–20.00 |
| P (Phosphorus) | 0.04 max | 0.02 max | 0.04 max | 0.04 max |
| W (Tungsten) | 3.00–4.50 | 2.50–3.50 | — | 0.50 max |
Hastelloy Round Bar Mechanical Properties
| Grade | Density (g/cm³) | Melting point | Tensile strength | Yield strength (0.2% offset) | Elongation |
|---|---|---|---|---|---|
| C276 | 8.89 | 1,370 °C (2,500 °F) | 790 MPa / 115,000 Psi | 355 MPa / 52,000 Psi | 40% |
| C22 | 8.69 | 1,399 °C (2,550 °F) | 690 MPa / 100,000 Psi | 310 MPa / 45,000 Psi | 45% |
| B2 | 9.20 | 1,370 °C (2,500 °F) | 760 MPa / 110,000 Psi | 350 MPa / 51,000 Psi | 40% |
| X | 8.22 | 1,355 °C | 655 MPa | 240 MPa | 35% |
Hastelloy Round Bars Weight Chart
| Size (mm) | Weight (kg/m) | Size (mm) | Weight (kg/m) | Size (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 7 × 7 | 0.337 | 19 × 19 | 2.479 | 38 × 38 | 9.916 |
| 8 × 8 | 0.440 | 20 × 20 | 2.747 | 40 × 40 | 10.988 |
| 9 × 9 | 0.556 | 21 × 21 | 3.029 | 42 × 42 | 12.114 |
| 10 × 10 | 0.687 | 22 × 22 | 3.324 | 45 × 45 | 13.906 |
| 12 × 12 | 0.989 | 25 × 25 | 4.292 | 50 × 50 | 17.168 |
| 14 × 14 | 1.346 | 28 × 28 | 5.384 | 55 × 55 | 20.774 |
| 16 × 16 | 1.758 | 30 × 30 | 6.181 | 60 × 60 | 24.723 |
| 18 × 18 | 2.225 | 36 × 36 | 8.900 | 65 × 65 | 29.015 |
Hastelloy Round Bar Equivalent Grades
| Grade | UNS no. | Werkstoff Nr. | JIS | GOST | EN | OR |
|---|---|---|---|---|---|---|
| Hastelloy C276 | N10276 | 2.4819 | NW 0276 | XH65MBY | NiMo16Cr15W | ЭП760 |
| Hastelloy C22 | N06022 | 2.4602 | NW 6022 | — | NiCr21Mo14W | — |
| Hastelloy B2 | N10665 | 2.4617 | — | — | — | — |
| Hastelloy X | N06002 | 2.4665 | — | — | NiCr22Fe18Mo | — |
Hastelloy Round Bar Grade Comparison
| Property | C276 | C22 | B2 | X |
|---|---|---|---|---|
| UNS no. | N10276 | N06022 | N10665 | N06002 |
| Key strength | Oxidising + reducing | Oxidising acids + FGD | HCl service | High-temperature |
| Max service temp. | 1,038 °C | 1,038 °C | 1,204 °C | 1,204 °C |
| High-temp suitability | Excellent | Good | Not recommended (reducing environments) | Excellent |
| Density | 8.89 g/cm³ | 8.69 g/cm³ | 9.20 g/cm³ | 8.22 g/cm³ |
| Best for | Chemical reactors, FGD, offshore | Pharma, mixed acid | HCl plants, pickling | Aerospace turbines |
| ASTM standard | B574 | B574 | B574 | B574 |
High-Temperature Suitability by Grade
| Hastelloy grade | High-temp suitability | Key properties |
|---|---|---|
| Hastelloy C276 | Excellent | Maintains strength and corrosion resistance |
| Hastelloy C22 | Good | Good oxidation resistance and strength |
| Hastelloy B2 | Not recommended for oxidising HT environments | Best for reducing environments |
| Hastelloy X | Outstanding | Designed for gas turbines and combustion systems |
Density Comparison — Hastelloy vs Other Metals
| Material | Density (g/cm³) |
|---|---|
| Hastelloy (family) | 8.0–9.2 |
| Stainless Steel | 7.9 |
| Titanium | 4.5 |
| Aluminium | 2.7 |
| Copper | 8.9 |
How Heat Treatment Affects Hastelloy Round Bar Hardness
| Heat treatment | Effect on hardness & properties |
|---|---|
| Annealing | Reduces hardness, increases ductility and corrosion resistance |
| Aging | Increases hardness (in precipitation-hardenable grades) |
| Cold working | Increases hardness, reduces ductility |
| Quenching | Variable effect depending on grade |
| Solution treatment | Moderate effect — optimises microstructure |
How Bar Thickness Affects Properties
| Property | Thicker bars | Thinner bars |
|---|---|---|
| Strength | Higher overall strength | Somewhat lower |
| Ductility | Better ductility | May be less robust |
| Corrosion resistance | Marginally better through-thickness | More susceptible to pitting |
| Machinability | Requires robust tooling | Easier to machine |
| Weldability | Needs preheating consideration | Standard practices apply |
| Heat treatment | Longer heating/cooling cycles | Heats and cools quickly |
Standards We Supply Against
| Standard body | Specification | Application |
|---|---|---|
| ASTM | B574 | Hastelloy round bar, hex bar, square bar |
| ASME | SB574 | Pressure vessel / boiler components |
| ASTM | B166 | Hastelloy rod, bar and wire |
| ASME | SB166 | Pressure vessel rod, bar and wire |
| EN / DIN | 2.4819, 2.4602, 2.4617, 2.4665 | European grade equivalents |
| ISO | 9001:2015 | Quality management system |
Marking on every bar: Nominal Size, Specification, Heat Number, Schedule / Wall Thickness
Test Certificates Available
- Mill Test Certificate (MTC) — standard with every order
- Third-Party Inspection Report (Bureau Veritas, SGS, TÜV, Lloyd's)
- PMI (Positive Material Identification) Test Report
- Raw Materials Certificate
- Fumigation Certificate (for export orders)
- Moisture Testing Report
- Country of Origin Certificate
- Bill of Lading (on dispatch)
Testing Methods
- PMI Test, Flaring Test, Visual Inspection
- Destructive and Non-Destructive Testing (NDT)
Standard Bar Forms
- Hastelloy Round Bar — the most widely used form for machined components and pump shafts
- Hastelloy Hex Bar — for valve bodies, fastener blanks, and bolt stock
- Hastelloy Square Bar — for structural and fabrication applications
- Hastelloy Flat Bar — for custom-machined pads, plates, and strips
- Hastelloy Rectangle Bar — for special machined profiles
- Hastelloy Hollow Bar — for tubular components machined from bar
- Hastelloy Forged Bar — for high-integrity applications requiring superior mechanical properties
- Hastelloy Bright Bar — cold-drawn, precision-tolerance bar for close-fit components
- Hastelloy Rods — in annealed / straightened condition for wire and precision machining
- Hastelloy Threaded Bar — pre-threaded stock for fastener and anchor applications
- Hastelloy Black Bar — hot-rolled, as-rolled surface for structural and non-precision uses
- Hastelloy Billet / Ingot — for further forging or rerolling
For complete Hastelloy bar product coverage, also see our Special Alloy Round Bar range. Pair bar orders with our Hastelloy C276 pipe fittings, Hastelloy C276 tube fittings, and Hastelloy C276 fasteners for a single-source supply solution.
Where Hastelloy Round Bars Are Used
Hastelloy tube fittings are indispensable wherever process media would destroy conventional stainless steel fittings within months. The following industries rely on them daily:
Chemical Processing Instrument tubing loops, sampling systems, chemical injection lines, and vent connections in reactors, columns, and storage vessels handling acids, chlorides, and oxidising/reducing mixed streams. Hastelloy C276 is the standard grade here; C22 steps in where oxidising conditions dominate.
Oil & Gas / Petrochemical Wellhead instrument connections, chemical injection quills, subsea control umbilicals, and offshore platform process lines exposed to H₂S-bearing sour gas and high-chloride brine. NACE MR0175-compliant fittings are readily available from Aashish Metals. Pair with our Hastelloy C276 pipes and tubes for complete instrument loop packages.
Pharmaceutical & Biotechnology High-purity sample lines, solvent transfer loops, and CIP/SIP connections in API synthesis plants and biofermentation facilities, where both aggressive solvents and oxidising sterilants must be handled by the same fitting.
Power Generation Steam and condensate sampling systems, flue-gas desulphurisation (FGD) scrubber instrumentation, and cooling water chemistry monitoring loops in power plants.
Aerospace & Defence Fuel system fittings, hydraulic lines, and test-rig connections for aircraft and defence applications where Hastelloy X and C276 are specified for their combination of corrosion resistance and high-temperature strength.
Marine & Shipbuilding Seawater cooling system connections, ballast water treatment instrument lines, and desalination plant tubing where marine-grade corrosion resistance is non-negotiable.
Water Treatment & Environment Hypochlorite dosing systems, acid scrubber instrument lines, and effluent treatment plant connections.
Food & Beverage / Research Laboratories Analytical instrument connections, HPLC sample lines, and chromatography column fittings where chemical inertness and freedom from contamination are critical.
Manufacturing, Heat Treatment & Fabrication
Hastelloy round bars are produced through three primary manufacturing routes — the choice depends on the required mechanical properties, tolerance, and surface finish:
Hot Rolling — Bars are produced at high temperature (above recrystallisation temperature), giving good ductility and reduced hardness. Surface is rough (black scale) and tolerances are wider. Best for general structural and fabrication use where precision is not critical.
Cold Drawing — Bars are drawn through a die at room temperature after hot rolling, improving surface finish, tightening tolerances, and increasing strength and hardness. Cold drawn bars are ideal for precision machining with tight dimensional requirements.
Forging — Bars are worked by compressive forces (hammer or press), producing superior grain structure, enhanced fatigue strength, and excellent impact toughness. Forged Hastelloy bars are specified for high-integrity applications such as pump shafts, valve bodies, and aerospace components.
Annealing — Solution annealing relieves internal stresses, restores ductility, and precipitates chromium carbides back into solution, restoring corrosion resistance after machining or cold working.
FAQs Hastelloy Round Bar
Hastelloy round bars conform to ASTM B574 / ASME SB574. Hastelloy rod, bar, and wire in general conform to ASTM B166 / ASME SB166. Dimensional and tolerance standards include EN, DIN, JIS, ASTM, BS, and AISI as applicable.
Aashish Metals stocks Hastelloy C276 round bars from 3 mm to 500 mm diameter, with lengths from 100 mm to 3,000 mm (and above on request). Hex bars are available from 2 mm A/F, square bars from 4 mm, and flat bars from 2 mm thickness.
Hastelloy C276 has higher molybdenum and tungsten content, making it superior in reducing environments such as HCl and H₂SO₄. Hastelloy C22 has more chromium, giving it better performance in oxidising environments like nitric acid and FGD scrubber streams. For general chemical service, C276 is the standard choice; for strongly oxidising conditions, C22 is preferred.
Yes. Hastelloy X (UNS N06002) is rated to 1,204 °C (2,200 °F), making it the top choice for gas turbine components, combustion chambers, afterburners, and industrial furnace parts. Its density is 8.22 g/cm³ and tensile strength is approximately 655 MPa.
We supply Hastelloy round bars in black (as-rolled/hot rolled), bright polished, rough turned, No.4 finish, matt finish, bright annealed (BA), peeled, hairline, and mirror finish. Cold drawn bars offer tighter tolerances and improved surface quality.
The primary applications include pump shafts, agitator shafts, valve stems and trim, impellers, fastener blanks (for machining into bolts and studs), precision-turned components, structural pins, bearing-quality bar, and aerospace turbine components (Hastelloy X).
Get a Fast Quote for Hastelloy Round Bars
Whether you need a single bar cut to length for a one-off repair, or a bulk order of round bar stock for a fabrication project, Aashish Metals can supply with speed and the full documentation your project requires.
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