Hastelloy C276 Pipe
Steel Pipe & Tubes has been a leading supplier of Hastelloy piping solutions.
Hastelloy C-276 (UNS N10276, W.Nr. 2.4819) is a great nickel-chromium-molybdenum alloy that has been made an outstanding choice in the production of seamless and welded pipes that can work under very corrosive conditions. C276 is a nickel based, engineered, pitting-resistant, crevice-corrosion and stress-corrosion-cracking (SCC) alloy that is used in pipes conducting chlorides, mixed acids, sour gases and high-temperature brines where the stainless steels or duplex grades or standard nickel alloys fail. Hastelloy C276 pipes conform to specifications ASTM B622 and ASTM B619 fully and have been demonstrated to be used in situations where high functionality is required in the chemical processing, offshore operations, pollution control operation and high-purity. Stellar Alloys is a supplier of Hastelloy C276 seamless pipes, Welded pipes and tubes which are highly controlled in terms of quality, certified as MTC 3.1 and stocked thus making it a reliable supplier of engineers and the buying team of companies who require high quality and performance corrosion resistant piping solutions.
Leading Manufacturer of Hastelloy C276 Seamless and Welded Pipes in India Offering UNS N10276 Alloy C276 Pipes Tubes and Custom SCH 10 SCH 40 SCH 80 Sizes
Stellar Alloys is one of the leading manufacturers and stockists of Hastelloy C276 seamless and welded pipes which were developed to be used in highly corrosive process environments. Our C276 Alloy pipes and tubes are manufactured within full compliance of ASTM B622 in the construction of seamless and ASTM B619 in the construction of welded pipes, giving a successful application in chemical processing unit, flue-gas desulfurization plants, offshore system and petrochemical circuits and high-temperature utility lines. We are also supporting C276 projects with some other corrosion-resistant grades like our Hastelloy C22 Pipe which has found favor in some mixed-acid, oxidising environments. UNS N10276 grade that has composition W.Nr. 2.4819 is highly resistant to pitting, crevice corrosion and stress-corrosion cracking and is therefore the material of choice in situations where stainless steel, duplex or even normal nickel alloys are not able to sustain structural integrity over time.
The C276 pipes are solution-annealed each and then subjected to closely controlled melting and forming conditions to achieve consistent and reliable corrosion resistance and microstructure. Our product range is extensive in terms of round, square and rectangular SCH 10, SCH 40 and SCH 80, including the ability to provide cut-to-length inventory to meet project-specific needs and U-bend tubes and prefabricated spools. The dimensional accuracy is ensured by strict controls of OD and WT and all heat can be traced by complete documentation.
All supplies are made with quality dossiers that contain EN 10204 3.1 MTCs, PMI test reports and inspection plans are prepared and in accordance with ASTM, ASME and international codes on pressure piping. Engineering teams that are operating according to ASME B31.3 and B31.1 guidelines can receive dimensional inspection reports, NDT summaries and code-ready documentation to guarantee smooth approval and commissioning. Such a blend of technical dependability, formal quality control and the availability of ready inventories, makes Stellar Alloys a reliable provider of the Hastelloy C276 pipes and tubes to the critical uses globally.
What Are Hastelloy C276 Pipes and UNS N10276 Alloy C276 Tubes?
Hastelloy C-276 is a high-performing nickel-molybdenum-chromium alloy that Hastelloy is very resistant to pitting, crevice corrosion and stress-corrosion cracking in aggressive chemical conditions. It contains very low carbon and silicon levels reducing grain-boundary precipitation to enable Alloy C276 pipes and UNS N10276 tubes to work reliably in the as-welded state where most alloys become less stable to corrosion. These features render C276 appropriate to operations with challenging demand like scrubber, absorbers, heat exchange and condensers, reactors, FGD units, off-gas ducting and high-salinity or chloride-intensive process lines.
Hastelloy C276 has shown excellent performance in mixed acid service, as well as in SO 2 and SO 3 streams, oxidizing media and high-temperature brines, when stainless steels, duplex grades, or standard nickel alloys fail to meet their corrosion limits. Stellar Alloys provides services to project teams by offering material selection advice, corrosion allowance advice, compatible welding procedures and overall quality assurance. Every batch of supplies has full traceability of heat, positive material identification (PMI) documents, dimensional inspection and test documentation to demonstrate adherence to codes as well as reliable operation of such supplies in highly process-sensitive operations.
Available Types of Alloy C276 UNS N10276 Seamless and Welded Pipes
Choose the appropriate product form for your system conditions. The Hastelloy C276 seamless pipe, to ASTM B622, is the highest the integrity achievable and ensures high-pressure and high-purity lines, whereas ASTM B619 and B626 welded pipes and tubes are the most economical with larger diameters. ERW, EFW, square and rectangular hollows are optional with diverse design and budget requirements.
25mm Hastelloy C276 Polished Pipes
Hastelloy C276 UNS N10276 Seamless Pipe 3/4 Inch
Hastelloy C276 Cold Drawn Seamless Pipe
50mm 60mm Hastelloy C276 Thin Wall Pipe
50.8mm 2 Inch Hastelloy Alloy 600 Pipe
2 Inch SCH 40S SP 3.91 Hastelloy C276 ANSI B36.10 SMLS Pipe
Alloy 2.4819 Heavy Wall Pipe
Thick Wall ASTM B622 UNS N10276 EFW Pipe
C276 Alloy Steel Rectangular Pipes
Hastelloy C276 Pipe Specifications
This spec block summarizes governing standards and delivery options for Alloy C276 Pipe & Tube. We manufacture ASTM B622/B619/B626 (ASME SB) with mechanicals per ASTM B751 and general requirements ASTM B829, supplying ends PE/BE/TE and finishes from mill to Bright Annealed. Use it to align RFQs, POs and MDRs.
| Parameter | Details |
| Material Grade | Hastelloy C-276, Alloy C-276, UNS N10276, DIN/W.Nr. 2.4819 |
| Standards | ASTM B622 (seamless pipe/tube), ASTM B619 (welded pipe), ASTM B626 (welded tube), ASTM B751 (mechanical tests), ASTM B829 (general requirements); ASME SB equivalents |
| Forms | Round, square, rectangular pipe/tube; ends PE/BE/TE |
| Schedules | SCH 5S, 10S, 40S, 80S, 120, 160 (size-dependent) |
| Delivery Conditions | Annealed / Bright Annealed / Solution Annealed & Pickled |
| Finish | Mill, BA, pickled, polished 180-600 grit, honed ID/OD |
| NDT | Hydrostatic, eddy-current, ultrasonic; RT for welds as ordered |
| Tolerances | As per ASTM B829 or agreed drawing |
| Certifications | EN 10204 3.1; third-party inspection on request. |
Available Size Range of Hastelloy C276 Pipes
Plan your build with our OD/WT window for Hastelloy C276 Seamless Pipe and Hastelloy C276 Welded Pipe/Tube. Ranges cover small-bore to large-OD, schedules SCH 5S-160 and gauge-based tubes, plus straight lengths, coils and U-bends. Use the table to map availability to pressure and layout needs.
| Form & Standard | OD range (mm) | NPS (in) | WT range (mm) | Schedule / Gauge | Typical lengths |
| Seamless Pipe – ASTM B622 | 4 – 219 | 1/8 – 8 | 0.5 – 20 | SCH 5S-160 | SRL / DRL / cut-to-length |
| Welded Pipe – ASTM B619 | 5 – 1219 | 1 – 24+ | ≈0.5 – 25 | SCH 5S-160 | SRL / DRL / custom |
| Seamless Tube – ASTM B622 | 3.2 – 25.4 (stock examples .125″-1″) | – | ≈0.25 – 1.65 (.010″-.065″) | by mm/gauge | Straight to ~26 m; U-bend/coils |
| Welded Tube – ASTM B626 | 6.35 – 50.8 (stock examples 1/4″-1/2″) | – | ≈0.89-1.65 (.035″-.065″) | by gauge | Straight/U-bend per order |
ASTM B574 / B622 UNS N10276 Tube Dimensions & Thickness Chart
Use this Hastelloy C276 Tube chart to size exchanger, condenser and instrumentation circuits. OD/WT pairs include approximate IDs to estimate velocity and pressure drop. Dimensions reflect common ASTM B622/B626 stock, easing take-offs and interchangeability across vendors.
| OD (mm) | OD (inch) | Typical WT (mm) | Approx. ID (mm) |
| 6.35 | 1/4 | 0.89 / 1.00 | 4.57 / 4.35 |
| 9.53 | 3/8 | 0.89 / 1.24 | 7.75 / 7.05 |
| 12.70 | 1/2 | 1.00 / 1.24 / 1.65 | 10.70 / 10.22 / 9.40 |
| 15.88 | 5/8 | 1.24 / 1.65 | 13.40 / 12.58 |
| 19.05 | 3/4 | 1.24 / 1.65 / 2.00 | 16.57 / 15.75 / 15.05 |
| 25.40 | 1 | 1.65 / 2.11 / 2.41 | 22.10 / 21.18 / 20.58 |
| 31.75 | 1-1/4 | 2.11 / 2.41 / 2.77 | 27.53 / 26.93 / 26.21 |
| 38.10 | 1-1/2 | 2.77 / 3.05 | 32.56 / 32.00 |
| 50.80 | 2 | 3.05 / 3.56 | 44.70 / 43.68 |
| 60.33 | 2-3/8 | 3.38 / 3.56 | 53.57 / 53.21 |
| 73.03 | 2-7/8 | 3.56 / 4.19 | 65.91 / 64.65 |
| 88.90 | 3-1/2 | 4.19 / 4.78 / 5.49 | 80.52 / 79.34 / 77.92 |
| 101.60 | 4 | 4.78 / 6.35 | 92.04 / 88.90 |
Based on prevalent stock sizes for B622/B626 C-276 tubing.
Pressure Ratings of ASTM B574 Hastelloy C276 Square Pipes (Indicative @ 38 °C / 100 °F)
These indicative ratings help screen Hastelloy C276 Square Pipes for low-temperature service (≈38 °C/100 °F). Values use a conservative thin-wall analogy with weld efficiency factors; finalize to ASME B31.3/B31.1 with Section II-D allowables, temperature derates and your exact geometry.
| Side × WT (mm) | Working Pressure Seamless (bar) | Working Pressure Welded (bar) |
| 25 × 2.0 | 330 | 281 |
| 40 × 2.5 | 255 | 217 |
| 50 × 3.0 | 245 | 208 |
| 50 × 5.0 | 410 | 349 |
| 75 × 3.0 | 155 | 132 |
| 100 × 5.0 | 195 | 166 |
Weight Chart of DIN 2.4819 Rectangular Pipes
Estimate handling, supports and freight using this weight table for DIN 2.4819 (Alloy C276) Rectangular Pipes. Figures assume nickel-alloy density and typical corner radii. Validate against approved drawings and tolerances before release to fabrication
| Size (B × H × t), mm | Approx. Weight (kg/m) |
| 50 × 25 × 3 | 3.67 |
| 75 × 50 × 3 | 6.31 |
| 100 × 50 × 4 | 9.99 |
| 100 × 75 × 5 | 14.54 |
| 150 × 100 × 6 | 25.14 |
Formula: W≈ρ[B⋅H−(B−2t)(H−2t)]×10−6W ≈ ρ [B·H − (B−2t)(H−2t)] × 10^{-6}W≈ρ[B⋅H−(B−2t)(H−2t)]×10−6 kg/m.
Reliable Supplier of Hastelloy C276 Pipes in India Offering Precision Cut Materials for Zero Wastage
Hastelloy C276 Seamless Pipe
- ASME SB 622 UNS N10276 Round Pipes
- C276 Hastelloy Rectangular Pipes
- Alloy C276 Hastelloy Square Pipes
- Hastelloy Alloy C276 Exhaust Pipes
- ASTM B622 UNS N10276 ERW Pipes
ASTM B622 UNS N10276 Welded Pipe
- Hastelloy C276 Schedule 160 Pipes
- Hastelloy UNS N10276 Gas Pipes
- ASME SB 622 UNS N10276 Schedule 40 Pipes
- Alloy NW 0276 Hot Finished Pipes
- ASTM B622 Alloy C276 Cold Drawn Pipes
Equivalent Grades of Hastelloy C276 Tube and UNS N10276 Material
| STANDARD | UNS | WERKSTOFF NR. | AFNOR | EN | JIS | OR | GOST |
| Hastelloy C276 Welded Pipe | N10276 | 2.4819 | – | NiMo16Cr15W | NW 0276 | ЭП760 | ХН65МВУ |
Chemical Composition of Hastelloy C276 and DIN 2.4819 Alloy
| Grade | Ni | C | Mo | Mn | Si | Fe | P | S | Co | Cr |
| Hastelloy C276 | Balance | 0.01 max | 15 – 17 | 1.0 max | 0.08 max | 4 – 7 | 0.04 max | 0.03 max | 2.5 max | 14.5 – 16.5 |
Mechanical Properties of Hastelloy C276 Seamless Pipe and Alloy C276 Tubes
| Density | Melting Point | Yield Strength (0.2%Offset) | Tensile Strength | Elongation |
| 8.89 g/cm3 | 1370 °C (2500 °F) | Psi – 52,000 , MPa – 355 | Psi – 1,15,000 , MPa – 790 | 40 % |
HSN Code of Hastelloy C276 Seamless Pipes (India)
Classify Hastelloy C276 Pipe and Hastelloy C276 Tube correctly for India shipments with these HSN references. Entries cover nickel-alloy tubes/pipes and common fittings supplied with UNS N10276 systems. Always confirm the final HSN and GST with your customs broker.
| Product form (nickel-alloy) | HSN code | Description (official) | Typical applicability | GST* |
| Tubes & Pipes (seamless or welded) | 7507 12 00 | “Nickel tubes and pipes of nickel alloys” | C-276 seamless/welded pipe & tube, square/rectangular | 18% |
| Tubes & Pipes (of pure nickel) | 7507 11 00 | “Nickel tubes and pipes of nickel, not alloyed” | Pure nickel only (not C-276) | 18% |
| Tube/Pipe Fittings (nickel) | 7507 20 00 | “Nickel tube or pipe fittings” | Elbows/tees/reducers/nipples | 18% |
Verify final classification/rates with your broker.
Physical Properties of Hastelloy C276 Pipes (Annealed)
Designers need reliable base data for UNS N10276 density, modulus, resistivity, conductivity and thermal expansion. Use this property table for stress and thermal calculations on Hastelloy C276 Pipe & Tube in the annealed condition, then apply code allowables for final sizing.
| Property | Value |
| Density | ~8.9 g/cm³ |
| Melting Range | 1325-1370 °C |
| Elastic Modulus (20 °C) | ~205 GPa |
| Poisson’s Ratio | ~0.30 |
| Electrical Resistivity (20 °C) | ~1.25-1.30 μΩ·m |
| Thermal Conductivity (100 °C) | ~11.6 W/m·K |
| CTE (20-100 °C) | ~12.4 μm/m·°C |
Temperature Range of UNS N10276 Welded Pipes
This service window outlines where Hastelloy C276 Welded Pipes operate effectively from cryogenic duties to high-temperature oxidizing environments. It flags the zones where corrosion is routine versus where creep governs. Finalize selections against ASME allowables and your WPS/PQR.
| Service band | °C | °F | Welded-pipe suitability | Typical notes / uses |
| Cryogenic to ambient | to −196 | to −320 | Fully usable; ductile in annealed condition. | Low-temp instrumentation/process lines. |
| Ambient to 650 | 20-650 | 68-1200 | Routine; excellent corrosion resistance. | CPI/FGD, chloride media (check chemistry). |
| Elevated service | 650-980 | 1200-1800 | Good oxidation/creep considerations govern. | Heater/furnace/acid gas components. |
| Upper practical (oxidizing) | up to ~1040 | up to ~1900+ | Often cited continuous-service top end; design to ASME allowables. | Oxidation-resistant duty near limit. |
Stress Rupture Properties of Hastelloy C276 Bright Annealed Pipes
Long-term strength at temperature is critical in heaters, headers and acid gas service. The table lists representative stress-to-rupture behavior for Alloy C276 in the annealed condition. Use it for screening, then design with the applicable code allowables and project-specific data.
Representative data at 650 °C (solution-annealed material):
| Stress (MPa) | Time to rupture (h) |
| 430 | ~76 |
| 400 | ~143 |
| 300 | ~400 |
| 260 | ~650 |
| (From controlled tests comparing C-276, Inconel 690/600; C-276 showed the highest persistence at 650 °C.) | |
Testing & Quality Standards for Alloy C276 ERW Pipes
Stellar Alloys enforces a complete QA/QC plan for Hastelloy C276 ERW Pipes material identity, leak integrity, NDE, mechanicals and dimensional checks. Documentation includes PMI, hydro/pneumatic test reports and EN 10204 3.1 MTCs to simplify audits and compliance.
PMI on each heat; random piece checks.
Leak testing: hydrostatic or pneumatic with defined hold times.
NDE: Eddy-current for thin walls; UT for heavier; RT on weld seams as ordered.
Mechanical tests: tensile/yield/elongation, flattening/flaring/flange, reverse-bend, hardness per ASTM B751.
Dimensional checks: OD/WT/ovality/straightness per ASTM B829 and prints.
Docs: EN 10204 3.1, packing lists, heat maps, barcode traceability.
Most Popular Types of Hastelloy C276 Pipes & Tubes
Need proven, fast-moving SKUs? This shortlist features the most specified Hastelloy C276 Seamless Pipe and C276 Tube sizes and finishes for CPI/FGD, seawater and mixed-acid duty. Use it as a quick selector, then request MTCs and NDT plans for final approval.
- Hastelloy C276 Seamless Pipe, SCH 40S, 1/2″ to 4″
- Hastelloy C276 Welded Pipe, large OD up to 24″
- Hastelloy C276 Seamless Tube for heat exchangers
- Hastelloy C276 Welded Tube for condensers and coolers
- DIN 2.4819 Square Pipes for structural service
- DIN 2.4819 Rectangular Pipes for frames and supports
- Hastelloy C276 Bright Annealed Pipes for clean service
- Hastelloy C276 ERW Pipes for utility service
(Portfolio breadth/positioning aligned with top supplier listings.)
Specification Sheet of Hastelloy C276 Bush & Hex Pipes
For threaded tie-ins and compact assemblies, Hastelloy C276 bush hex parts provide strength and corrosion resistance in a wrench-friendly profile. The spec sheet below covers AF sizes, schedules, threads (NPT/BSPT), finishes and testing ideal for instrumentation and chemical dosing lines.
| Field | Specification |
| Product | Hastelloy C-276 Bush Hex Pipe / Hex Nipple |
| Grade | UNS N10276, DIN 2.4819 |
| Size Range | 1/4″ to 4″ NPS; custom AF on request |
| Thickness | Schedule 10S to 80S |
| Ends | Male/Female threaded (NPT/BSPT), BE/PE |
| Finish | BA, pickled, polished |
| Standards | Mother pipe per ASTM B622/B619; threads to ASME B1.20.1 / ISO 7/1 |
| Testing | Hydro test, thread gauge check, PMI |
| Applications | Instrument connections, chemical dosing, high-temp tie-ins |
Latest Price List of Alloy C276 Seamless & Welded Tubes
Budgeting Alloy C276 Tube depends on OD/WT, condition (BA/AP), test scope and nickel surcharges. The matrix below gives indicative guidance for common sizes and MOQs. For live pricing, share cut lengths, documentation and delivery windows for an optimized quote.
| OD × WT (mm) | Condition | Typical MOQ | Indicative Pricing |
| 12.7 × 1.24 | Bright Annealed | 100 m | Price on Request |
| 19.05 × 1.65 | Annealed | 100 m | Price on Request |
| 25.4 × 2.11 | Annealed & Pickled | 200 m | Price on Request |
| 38.1 × 2.77 | Annealed | 100 m | Price on Request |
| 50.8 × 3.05 | Annealed | 50 m | Price on Request |
Why Engineers and Procurement Teams Trust Stellar Alloys for Hastelloy C276 Pipes and Tubes
The determination of the project reliability, audit readiness and schedule control depend on the proper selection of the supplier of the corrosion resistant piping. Stellar Alloys provides uniformity in its performance by providing proven Alloy C276 material with properly sustained traceability, rigorous QA activities and reliable export operations. We have inventory of seamless and welded constructions in various schedules, which provide engineers with an instant selection of high-pressure, high-purity and high-temperature uses.
All batches are backed with EN 10204 3.1 certification, PMI conformity to and compliance with requirements of ASTM B622, B619 and B626, which gave a hundred percent compliance with ASME B31.1 and B31.3 documentation. This removes the rework in the code reviews and project qualification is simplified.
In our ready stock we have an extensive variety of pipe schedules, precision tubes, hollows square, hollows rectangular, U-bends and cut-to-length fittings. Controlled OD, WT and ovality and smooth internal surfaces are beneficial in minimizing fouling in exchangers, instrumentation loops and high-purity services.
Stellar Alloys also is not left behind in welding skills with approved WPS/PQR welds, controlled interpass and optional RT, UT, EC or hydrostatic tests. This guarantees steady seam integrity and reliable working in difficult chemical conditions.
Wall-thickness selection, temperature derating and corrosion compatibility aid to engineering teams are also provided on FGD systems, mixed-acid plants and sour-gas circuits. Full MDR package, proper HSN documentation, seaworthy packing and JIT delivery package reportedly make us a committed player of the global C276 piping projects.
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Frequently Asked Questions About Hastelloy C276 Pipes and Tubes
The Hastelloy C276 pipe is produced per ASTM B622 to be produced seamlessly and ASTM B619 or B626 to be welded. These specification outline the practice of melting, chemical, mechanical, limits, heat treatment, and dimensional allowances that provide uniform performance at high temperature corrosive conditions.
Hastelloy C276 is applied in chemical work, desulfurization of flue-gasses, mixed acid, sour-gas systems and high-salinity brines and pollution control devices. Being pitting, crevice corrosion and stress-corrosion cracking resistant, it can be used in the demanding chloride- and acid-containing applications.
C276 pipe is made of a nickel-chromium-molybdenum alloy with additions of tungsten and very low carbon and silicon content. This composition offers stability in oxidizing and reducing environments, minimizing grain-boundary precipitation and preserving corrosion resistance in the as-welded condition.
Hastelloy C276 pipes are typically available from small-bore instrumentation sizes to large process diameters, covering schedules SCH 5S through SCH 160. Custom OD, wall thickness, U-bend tubes and fabricated spools can also be supplied based on project requirements.
Yes. Hastelloy C276 is very resistant against pitting and crevice corrosion in chloride-bearing sea water, high temperature brines and high salinity process streams. It is stable both in oxidizing and reducing chloride systems thus it has been used as one of the most reliable materials in marine and offshore applications.
Hastelloy C276 pipes are typically subjected to PMI, hydrostatic testing, eddy-current testing, ultrasonic examination, visual and dimensional checks and mechanical testing as per ASTM and ASME requirements. These tests ensure material integrity, traceability and compliance for critical services.
Yes. The supplies are EN 10204 3.1 MTCs, PMI reports, dimensional inspection results, NDT summaries and test certificates consistent with ASTM B622, B619 and B626. MDRs are also available upon request in MDRs of ASME B31.3 and B31.1.