- Home
- Round Bar
- Hastelloy Round Bars
- Hastelloy C22 Round Bars
Hastelloy C22 Round Bars Supplier in Mumbai, India – ASTM B574 UNS N06022
Nicorex Alloys is an ISO 9001 / ISO 14001 certified importer, stockist, and trading company of Hastelloy C276 round bars based in Mumbai, India. Alloy C-276 (UNS N10276, Werkstoff 2.4819, EN NiMo16Cr15W) is a nickel-molybdenum-chromium-tungsten alloy manufactured to ASTM B574 / ASME SB574 and AMS 5750. Our products of the given specification are supplied throughout the country and worldwide.
The 16% Mo + 4% W combination is what makes C276 the industry benchmark for reducing-acid and chloride-rich service. That tungsten addition sets it apart from every other C-family alloy, giving unmatched corrosion-resistance service to pitting and crevice attack in HCl, H₂SO₄, and chloride process streams, performing for longer. Minimum tensile reaches 690 MPa (100 ksi) with 283 MPa (41 ksi) yield and 40% elongation in the solution-annealed condition at 1121°C (2050°F). Hastelloy C276 density is 8.89 g/cm³. Melting range: 1325-1370°C (2455-2500°F). Maximum service: 1038°C (1900°F) in oxidising atmospheres. NACE MR-01-75 / ISO 15156 listed for sour gas service.
The diameters vary from 3 mm to 500 mm, with a length of up to 6000 mm. The shapes include round bars, hex bars, flat bars, square bars, rectangular bars, forged bars, hollow bars, and rods. The conditions of heat and processing include solution annealed, cold drawn, hot rolled, and forged. The surface finishes include black, bright, turned, peeled, and polished. The welding process uses ERNiCrMo-4 (AWS A5.14) matching filler wire. All shipments are accompanied by EN 10204 3.1 mill test certificates, PMI reports, and traceability documents.
Hastelloy Alloy C22 Round Bar Specifications
| Specification | ASTM B574 / ASME SB574 |
|---|---|
| Diameter | 3 – 500 mm; Hex 2–100 mm A/F; Square 4–100 mm |
| Length | 100 – 6000 mm (SRL, DRL, cut-to-length) |
| Condition | Solution Annealed at 1121°C (2050°F); Cold Drawn; Forged |
| Surface | Black, Bright, Turned, Peeled, Polished, Ground |
| Hardness | ≤241 HB (solution annealed) |
| Tolerance | h8–h13, k9–k12 |
| Forms | Round, Hex, Flat, Square, Rectangular, Forged, Hollow |
Chemical Composition of Alloy C22 Bars
| Element | Nickel (Ni) | Chromium (Cr) | Molybdenum (Mo) | Tungsten (W) | Iron (Fe) | Cobalt (Co) | Vanadium (V) | Silicon (Si) | Carbon (C) |
|---|---|---|---|---|---|---|---|---|---|
| Content (wt%) | Balance | 20.0 – 22.5 | 12.5 – 14.5 | 2.5 – 3.5 | 2.0 – 6.0 | 2.5 max | 0.35 max | 0.08 max | 0.015 max |
Mechanical Properties of ASTM B574 Hastelloy C22 Bar and Rod
| Property | Tensile Strength | Yield 0.2% Offset | Elongation | Hardness |
|---|---|---|---|---|
| ASTM B574 Min | 690 MPa (100 ksi) | 310 MPa (45 ksi) | 45% | ≤241 HB |
| Typical | 800 MPa (116 ksi) | 370 MPa (53.7 ksi) | 62% | – |
Hastelloy C22 Round Bar & Rod Equivalent Grades
| Standard | UNS / Werkstoff | EN / BS | JIS | GOST |
|---|---|---|---|---|
| Designation | N06022 / 2.4602 | NiCr21Mo14W / NA59 | NW 6022 / ХН55МВЦ | ХН55МВЦ |
Physical Properties of Nickel Alloy C22 Round Bars
| Property | Density | Melting Range | Elastic Modulus | Thermal Conductivity (25°C) | Thermal Expansion (25–100°C) | Electrical Resistivity (25°C) |
|---|---|---|---|---|---|---|
| Value | 8.69 | 1357–1399 | 206 | 10.1 | 12.4 × 10⁻⁶ | 1.14 |
| Unit | g/cm³ | °C | GPa | W/m·°C | /°C | µΩ·m |
Premium Industrial Materials
Get Hastelloy C22 Round Bars
at Competitive Prices
Available Forms of Hastelloy C22 Bars
Hastelloy C22 Round Bar
Alloy C22 Hex Bar
Hastelloy C22 Flat Bar
Nickel Alloy C22 Square Bar
C22 Forged Round Bar
Hastelloy C22 Hollow Bar
UNS N06022 Rectangular Bar
Hastelloy C22 Rod
Machining, Hot Working & Heat Treatment of Hastelloy C22 Round Bars
Hastelloy C22 machining is moderate to difficult. Use carbide inserts at 15–25 m/min with positive rake, rigid setups, and flood coolant. The alloy work-hardens rapidly; avoid light rubbing cuts. Hot forge from 1232°C (2250°F) down to 954°C (1750°F) with moderate reductions. Re-anneal after all hot work.
Solution anneal at 1121°C (2050°F), water quench. Cold-worked parts with >7% outer fibre elongation must be re-annealed. Stress relief at 650°C is not recommended (risk of intermetallic precipitation). Weld by GTAW, GMAW, or SMAW using ERNiCrMo-10 (AWS A5.14) matching filler. No preheat required. ERNiCrMo-10 also serves as a universal overmatching filler for joining C276, 625, and dissimilar Ni-Cr-Mo alloys.
Industries Using Hastelloy C22 Round Bars
- Reactor internals, agitator shafts, and heat exchanger baffles in mixed HNO₃/HCl and H₂SO₄/HNO₃ service. Preferred over C276 when process upsets introduce oxidising conditions.
- Scrubber shafts, damper mechanisms, and stack liner supports in sulfurous/chloride condensate.
- Reactor shafts and centrifuge components for cGMP-compliant equipment.
- Vitrification internals and containment barriers for multi-thousand-year repository service.
- Mixer shafts in ClO₂ and hypochlorite bleach plant digesters.
- Valve stems and wellhead bars per NACE MR-01-75; C-22HS (N07022) for ultra-high-strength sour service.
- Seawater pump shafts and desalination valve parts.
How to Order Hastelloy C22 Round Bars from Nicorex Alloys
- Bar Form - Round, Hex, Flat, Square, Forged
- Diameter / Cross-Section Size - Specify mm or inches
- Length - Standard random, cut-to-length, custom
- Quantity - kg, MT, or number of pieces
- Condition - Solution Annealed, Cold Drawn, As-Forged
- Surface Finish - Black, Bright, Peeled, Ground, Polished
- Tolerance Class - h8, h9, h11, etc.
- Standard - ASTM B574 / ASME SB574
- Testing - MTC 3.1, MTC 3.2, PMI, UT, NACE TM0177, HIC per NACE TM0284, IGC per ASTM G28
- Third-Party Inspection - TPI by Lloyd's, BV, SGS, DNV if required
- Packaging - Standard bundles, wooden cases, export-grade
- Delivery Destination - Domestic India / international export
Frequently Asked Questions
How Does Hastelloy C22 Differ from C276 for Round Bar Applications?
C22 has 20–22.5% Cr, while C276 has 14.5–16.5% chromium. This gives C22 superior resistance to oxidising acids and makes it the better choice when conditions fluctuate between oxidising and reducing. C276, with higher Mo (15–17% vs 12.5–14.5%), remains preferred for dedicated reducing-acid service. Both resist chloride SCC.
Why is C22 Filler Wire Used to Weld Dissimilar Nickel Alloys?
Can Hastelloy C22 Bars Be Used in Nuclear Waste Containment?
Yes. C22 has been evaluated and specified for nuclear waste repository applications. The alloy resists long-term localised corrosion in hot, chloride-bearing groundwater.
Is Hastelloy C22 Bar Approved for Sour Gas Service?
Yes. Hastelloy C22 bar is listed under NACE MR-01-75 / ISO 15156. It resists sulfide stress cracking and hydrogen-induced cracking in H₂S environments. C-22HS (UNS N07022) is available for yield >120 ksi sour service.
What is the Maximum Service Temperature for C22 Bar?
C22 bar is suitable up to 677°C (1250°F) for sustained corrosive service. Prolonged exposure above 650°C risks intermetallic precipitation. For higher temperatures, consider Hastelloy X or Inconel 625.