Hastelloy C276 Pipe & TubeASTM B622 UNS N10276 · Manufacturer, stockist & exporter, India
Also sold as Alloy C-276 · UNS N10276 · W.Nr 2.4819 · Nicrofer 5716
Hastelloy C276 pipe is supplied seamless to ASTM B622 and welded to ASTM B619, in ASME pipe sizes and schedules, with tube to ASTM B622 · B626. It is a nickel–molybdenum–chromium alloy with tungsten, chosen for the most aggressive mixed acids, wet chlorine and hypochlorite. Kanak Steel & Engineering Co. supplies it with EN 10204 3.1 mill certificates from Mumbai to buyers across India, the Gulf, South-East Asia, South America, Europe, the UK and the USA.
- Stock & mill supply
- EN 10204 3.1 / 3.2
- PMI on request
- NACE MR0175 on request
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is Hastelloy C276 Pipe & Tube?
Hastelloy C276 pipe & tube is a nickel–molybdenum–chromium alloy with tungsten supplied as pipe & tube to ASTM B622 (UNS N10276). Buyers specify it for the most aggressive mixed acids, wet chlorine and hypochlorite. It is also sold as Alloy C-276, UNS N10276, W.Nr 2.4819.
- What it is
- Nickel–molybdenum–chromium alloy with tungsten
- Seamless
- ASTM B622
- Welded
- ASTM B619
- Sizes
- NPS ⅛" – 24" · OD tube to order
- Schedules
- 5S · 10S · 40S · 80S · 160 · XXS
- Best at
- The most aggressive mixed acids, wet chlorine and hypochlorite
Hastelloy C276 Pipe & Tube Specification & Sizes
| Seamless pipe | ASTM B622 |
|---|---|
| Welded pipe | ASTM B619 |
| Tube | ASTM B622 · B626 |
| Grade | Hastelloy C276 · UNS N10276 · W.Nr 2.4819 |
| Size & schedule | NPS ⅛" to 24" to ASME B36.19 / B36.10; OD × wall for tube |
| Length | Single random, double random, or cut lengths |
| Ends | Plain end · bevelled end (for welding) · threaded |
| Testing | Hydrostatic or eddy-current · PMI · flattening & flaring · IGC on request |
| Documents | EN 10204 3.1 · 3.2 with third-party inspection |
Hastelloy C276 Pipe: Seamless, Welded or Tube?
Three different specifications cover C276 tubular products. Pick the route first — it decides price, test requirements and lead time. General requirements (tolerances, hydrostatic or electric testing) come from ASTM B829 (seamless) and B775 (welded). Schedules, the −12.5% wall tolerance and the B31.3 wall formula are explained in the pipe guide.
- Seamless pipe is ASTM B622; welded pipe is B619; welded tube is B626.
- Low carbon and silicon limit grain-boundary precipitation in the weld heat-affected zone, so welded C276 keeps its corrosion resistance as-welded.
- Welded B619 (solution annealed) is usually the economical choice in larger sizes.
| Route | Specification | Use it for |
|---|---|---|
| Seamless pipe | ASTM B622 | Pressure and critical service; no weld seam to inspect. |
| Welded pipe | ASTM B619 | Economical in larger diameters and thinner walls where the code allows it. |
| Tube | ASTM B622 · B626 | Heat exchangers and instruments; ordered by exact OD × wall. |
Hastelloy C276 Pipe Wall & Weight by Schedule
For the same size, the schedule sets the wall — and the weight you pay for. Cross-sections are drawn to scale for 2" NPS (OD 60.33 mm, ASME B36.19); weights use the density of Hastelloy C276, 8.89 g/cm³.
Other sizes: pipe schedule chart and weight calculator.
Hastelloy C276 Pipe & Tube Chemical Composition
Under technical review for TDS.
| Element | Current requirement |
|---|---|
| Nickel | As specified |
| Molybdenum | As specified |
| Chromium | As specified |
| Iron | As specified |
| Tungsten | As specified |
| Cobalt | As specified |
| Carbon | As specified |
| Manganese | As specified |
| Vanadium | As specified |
| Silicon | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification to be verified: ASTM B575 for UNS N10276.
Hastelloy C276 Pipe & Tube Mechanical Properties
Under technical review for TDS.
| Property | Current requirement |
|---|---|
| Tensile strength | As specified |
| Yield strength 0.2% | As specified |
| Elongation | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification and condition to be verified: ASTM B575 for UNS N10276 — Solution-annealed plate & sheet.
Density & Physical Properties
| Property | Value |
|---|---|
| Density | 8.89 g/cm³ |
| Melting range | 1323 – 1371 °C |
| Magnetic | Non-magnetic |
| PREN (approx.) | ≈ 68 |
Hastelloy C276 Equivalent Grades
Hastelloy C276 Pipe Weight Chart (kg/m)
Weight per metre (kg/m) = (OD − WT) × WT × 0.02793, with OD and wall thickness in mm. The factor comes from Hastelloy C276's density of 8.89 g/cm³.
Example: 4" Sch 40S (114.30 × 6.02 mm)
(114.30 − 6.02) × 6.02 × 0.02793 = 18.21 kg/m
| NPS | OD mm | Sch 10S kg/m | Sch 40S kg/m |
|---|---|---|---|
| ½" | 21.34 | 1.13 | 1.44 |
| 1" | 33.40 | 2.37 | 2.83 |
| 2" | 60.33 | 4.45 | 6.16 |
| 3" | 88.90 | 7.31 | 12.79 |
| 4" | 114.30 | 9.48 | 18.21 |
| 6" | 168.28 | 15.66 | 32.00 |
| 8" | 219.08 | 22.61 | 48.18 |
Six-digit Harmonized System heading (nickel alloy, chapter 75). Your country adds its own digits — confirm with your customs broker. All HS codes.
How to Verify Hastelloy C276 Pipe & Tube with PMI
Positive material identification with a handheld XRF gun confirms the alloy on the piece itself, in seconds, before it is cut or welded. Hastelloy C276 is most often mixed up with Hastelloy C22 — the table shows which elements tell them apart.
Handheld XRF does not measure carbon or nitrogen; those come from the mill certificate or optical emission (OES) testing. PMI can be arranged on request — state it on your enquiry.
Under technical review for TDS.
| Element | Hastelloy C276 | Hastelloy C22 |
|---|---|---|
| Nickel | As specified | As specified |
| Chromium | As specified | As specified |
| Molybdenum | As specified | As specified |
| Tungsten | As specified | As specified |
| Iron | As specified | As specified |
| Manganese | As specified | As specified |
Hastelloy C276 Pipe & Tube Price — What Decides It
Two quotes for "C276 pipe & tube" can differ by 20% and both be fair. We quote C276 pipe & tube per kg for full sizes and per piece for cut sizes. These six things move the price per kg, so you can compare offers like for like.
Hastelloy C276 Pipe & Tube Applications
Hastelloy C276 is specified when the cheaper grade will not survive the service but a higher alloy would be more than the job needs. These are the jobs our buyers use it for.
Hastelloy C276 Pipe & Tube vs 625, C22 and 2507
| Grade | Pipe & Tube standard | PREN (approx.) | Pick it when |
|---|---|---|---|
| Super Duplex 2507 | ASTM A790 | ≈ 42 | Seawater and high-chloride service where strength also matters |
| Inconel 625 | ASTM B444 | ≈ 51 | Seawater, high strength and high temperature in one alloy |
| Hastelloy C22 | ASTM B622 | ≈ 65 | Mixed oxidising and reducing acids, and weld overlays |
| Hastelloy C276 | ASTM B622 | ≈ 68 | The most aggressive mixed acids, wet chlorine and hypochlorite |
PREN = Cr + 3.3 Mo + 16 N, from mid-range chemistry. A screening guide, not a substitute for corrosion data on your medium.
Hastelloy C276 Corrosion Resistance — Element by Element
Each alloying addition has a job. Knowing which one protects against your medium is the quickest way to judge whether C276 fits.
Very high molybdenum handles hydrochloric and sulphuric acid where other alloys fail.
Chromium adds resistance to oxidising acids, wet chlorine and hypochlorite.
Tungsten further improves pitting and crevice resistance.
Very low carbon and silicon let C276 be used as-welded.
How your C276 pipe & tube order runs
- 01Enquiry review — we confirm size, standard edition and documents against your MR or drawing.
- 02Heat selection & PMI — the mill certificate is checked against your order; PMI before processing is available on request.
- 03Processing — cutting, machining or bevelling to your specification, with heat numbers marked.
- 04Inspection — your third-party inspector witnesses, or we share photos and test reports.
- 05Packing & dispatch — seaworthy packing from Nhava Sheva (JNPT), Mumbai, FOB or CIF, documents sent before the vessel sails.
Welding & Fabricating Hastelloy C276 Pipe & Tube
Hastelloy C276 welds by all common arc processes. A few points our buyers ask about:
| Matching filler | ERNiCrMo-4 (AWS A5.14) |
|---|---|
| Over-alloyed filler | ENiCrMo-4 electrode |
| Preheat | Not required; keep interpass temperature low |
| Cutting | Thermal or abrasive cutting; grind off heat-tinted edges before welding |
Follow your approved WPS; this is general guidance. See also C276 fittings and C276 flanges for the matching pipe-system parts.
How to Order Hastelloy C276 Pipe & Tube: RFQ Checklist
Get an accurate quote the first time. Copy this list into your enquiry:
- Seamless or welded, and the standard
- NPS and schedule (or OD × wall for tube)
- Length — random or cut, and number of lengths
- End finish — plain, bevelled or threaded
- Certificate type and extra tests
- Delivery port, Incoterm and required date
Hastelloy C276 pipe & tube for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiHastelloy C276 pipe & tube — questions buyers ask
Is Hastelloy C276 the same as Alloy C-276?
Alloy C-276, UNS N10276, W.Nr 2.4819 are names used for Hastelloy C276 (W.Nr / EN numbers and older UNS variants are the closest designations; their limits can differ slightly, so specify the UNS number and ASTM grade on the order), and pipe & tube is ordered to ASTM B622 whichever name is on the enquiry.
What is the difference between Hastelloy C276 pipe and tube?
Pipe is ordered by nominal pipe size and schedule, for carrying fluids. Tube is ordered by exact outside diameter and wall, for heat exchangers and instruments, and is held to tighter tolerances.
Seamless or welded Hastelloy C276 pipe — which should I buy?
Seamless (ASTM B622) is the default for pressure and critical service. Welded (ASTM B619) is cheaper in larger diameters and thinner walls and is accepted where the design code allows it.
What is the wall-thickness tolerance on Hastelloy C276 pipe?
Seamless pipe is normally allowed −12.5% on nominal wall under its general-requirements standard (ASTM B829 (seamless) and B775 (welded)). Allow for it in the pressure calculation or order on minimum wall.
Can Hastelloy C276 pipe be welded to carbon-steel pipe?
Yes, with the right filler: a nickel-base filler such as ERNiCr-3 (or ERNiCrMo-3) is used when joining it to carbon steel. Follow a qualified WPS.
Can Hastelloy C276 pipe & tube be supplied to NACE MR0175?
Hastelloy C276 is covered by NACE MR0175 / ISO 15156-3 within the environmental limits, heat-treatment conditions and hardness limits that standard sets for it. State the requirement on the order so that condition and hardness are verified and reported on the certificate.
Hastelloy C276 or Super Duplex 2507 — which should I choose?
Hastelloy C276 is chosen for the most aggressive mixed acids, wet chlorine and hypochlorite. Super Duplex 2507 is the step up when you need more pitting resistance or strength. See the comparison table on this page, or ask us with your process conditions.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026