Hastelloy® Hollow Bars: Supreme Resistance to Aggressive Corrosives
UNS N10276 | ASTM B622 | DIN 2.4819 Premium hollow bars from Mumbai for chemical, pharma, and power sectors.
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During a 2020 upset at a Tamil Nadu chlor-alkali plant, Alloy 22 reactor tubes failed catastrophically after 9 months in wet chlorine service, causing ₹8 crore in lost production and hazardous leaks. Hastelloy C-276 hollow bars replaced them, operating flawlessly for over 4 years demonstrating why Ni-Mo-Cr alloys are indispensable for oxidizing acids and halogens.
This case exemplifies Hastelloy hollow bars' versatility in mixed acid environments, outlasting Inconel or titanium where pitting and stress corrosion dominate.
Standards and Specifications for Hastelloy Hollow Bars
Hastelloy® C-276 hollow bars meet stringent codes for universal corrosion resistance:
- UNS N10276: Nickel-molybdenum-chromium alloy 276.
- ASTM B622: seamless pipe and tube; B574 covers rod and bar.
- DIN/EN 2.4819 (NiMo16Cr15W): German/EU designation.
- Additional: ASME SB-619, ISO 6207, NACE MR0175/ISO 15156.
Dimensions: 21-406mm OD, 2.5-50mm walls, lengths to 10m. Non-destructive testing: ET, UT (ASTM E213), hydrotest to 150% yield.
Specifications by Grade – Rod and bar
A specification is written for a product form. The standards below are the ones that cover rod and bar; the plate, bar and tube specifications for these grades are different documents and are listed on their own pages.
| Grade | UNS | Rod and bar specification |
|---|---|---|
| B-2 | N10665 | ASTM B335 |
| C-4 | N06455 | ASTM B574 |
| C-22 | N06022 | ASTM B574 |
| C-276 | N10276 | ASTM B574 |
| C-2000 | N06200 | ASTM B574 |
| G-30 | N06030 | ASTM B581 |
| N | N10003 | ASTM B573 / AMS 5771 |
| X | N06002 | ASTM B572 / AMS 5754 |
Product Forms, Composition & Key Properties
Seamless hollow bars via extrusion or piercing, cold-worked finishes. Range: 30-350mm OD. Stock for OEM machining; pairs naturally with Hastelloy hex bars.
Chemical Composition (ASTM B622 / UNS N10276)
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | Balance (57 min) |
| Molybdenum (Mo) | 15.0-17.0 |
| Chromium (Cr) | 14.5-16.5 |
| Iron (Fe) | 4.0-7.0 |
| Tungsten (W) | 3.0-4.5 |
| Cobalt (Co) | 2.5 max |
Applications by Industry: Why Hastelloy® Over Others
Preferred for "universal" corrosion resistance in oxidizing/reducing acids, surpassing Monel in chlorides and titanium in reducers.
Chemical Processing & Pharma
Scrubber towers, HCl evaporators; resists 20% wet Cl2 at 100°C.
Oil & Gas
Sour gas components; NACE-approved for HPHT wells.
Marine & Power Generation
FGD systems, flue gas ducts; handles SOx/NOx pollutants.
OEM, Fabricators & Supply
Pipe stock; complements Hastelloy hex bars for fittings.
75%
Chemical plants using Hastelloy C-276 cut corrosion downtime by 65% (CEFIC).
$4.2B
Hastelloy market growth to 2028 (materials forecast).
100x
Better in mixed acids vs. SS316.
Hastelloy C-276 Hollow Bars vs. Alternatives
| Property | Hastelloy C-276 | Alloy 22 | Monel 400 | 254 SMO |
|---|---|---|---|---|
| Oxidizing Acids | Excellent | Excellent | Good | Fair |
| Reducing Acids | Excellent | Good | Excellent | Poor |
| Chlorides Pitting | Superior | Superior | Good | Good |
| Cost (per kg) | ₹5200 | ₹4800 | ₹3200 | ₹1800 |
| Temp Limit (°C) | 1040 | 1120 | 480 | 1100 |
| Best For | Universal | Chlorine | HF | Seawater |
Quality Certifications & Compliance
- ISO 9001:2015, ISO 14001 certified; mill reps available.
- Testing suite: PMI (XRF), UT Level 3, IGC A262 E, charpy impact.
- Standards met: ASME VIII, TEMA, NACE MR0103/MR0175.
- Export certified: CE, AD2000, ready for global shipment from Mumbai.
Frequently Asked Questions
Why choose Hastelloy C-276 hollow bars for chemical processing?
UNS N10276 (ASTM B622) delivers unparalleled resistance to H2SO4, HCl, and wet Cl2 up to boiling points. With 16% Mo + 16% Cr, PREN >60 prevents pitting where Alloy 22 or 625 fail, saving OEMs 70% on lifetime costs in phosphoric acid plants. DIN 2.4819 compliant.
Are Hastelloy hollow bars suitable for oil & gas sour service?
Yes, Hastelloy C-276 meets NACE MR0175 for H2S partial pressure up to 100 psi at 232°C. Ideal for tubulars and valves in HPHT wells, offering better SCC resistance than duplex grades for fabricators specifying long-life sour components.
What sizes of Hastelloy hollow bars are stocked?
Standard: 21-406mm OD, 2.5-50mm walls, 6-10m lengths per ASTM B622. Seamless from Mumbai for immediate dispatch; custom per DIN 2.4819 for EU procurement heads.
How does Hastelloy C-276 perform in power generation FGD systems?
Excels in SO2/SO3 slurries and Cl- contaminated flue gas, with corrosion rates <0.1 mm/y vs. 1-5 mm/y for SS. Preferred over titanium for cost in scrubber internals, per industry standards.
Global Export Destinations
We ship worldwide from Mumbai. See every destination we export to on our export markets page.
Domestic Supply Network
We deliver across India from our Mumbai stockyard. See every city we supply on our supply locations page.
Depend on Hastelloy Hollow Bars for Corrosion Assurance
Validated through rigorous testing and real-world extremes, Hastelloy C-276 hollow bars (UNS N10276, ASTM B622) provide procurement confidence with unmatched versatility and compliance for chemical, power, and marine challenges. Mumbai-sourced precision for global projects.
Which corrosive challenge will Hastelloy hollow bars solve for your facility?