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 high-performance nickel-chromium-molybdenum-tungsten alloy engineered for extreme chemical environments. It is selected for critical industrial equipment where mixed oxidizing and reducing agents, chlorides, mixed acids and hot brines create high risks of pitting, crevice corrosion and stress-corrosion cracking. C-276 is often specified when conventional stainless steels or duplex grades approach their corrosion limits, ensuring superior operational uptime, safety margins and lifecycle cost efficiency. Stellar Alloys brings over 25 years of expertise in nickel-alloy metallurgy, combining deep industry experience, disciplined quality assurance and a proven track record in delivering reliable solutions for challenging chemical processes making it a trusted partner for engineers and procurement teams worldwide.
Top Manufacturer of Hastelloy C276 Seamless & Welded Pipes in India | Alloy C276 / UNS N10276 Sizes & Custom Solutions
What Are Hastelloy C276 Pipes / Tubes?
Hastelloy C-276 is a corrosion-resistant alloy with very low carbon and silicon content which limits grain-boundary precipitation and allows use in the as-welded condition for many chemical systems. Typical applications include scrubbers, absorbers, heat exchangers, condensers, reactors, columns and off-gas lines, as well as SO₂ and SO₃ handling and high-salinity or chloride-bearing solutions. The alloy’s durability against pitting, crevice attack and localized corrosion makes it ideal for challenging industrial processes. Stellar Alloys supports its deployment through material selection guidance, corrosion allowance recommendations, welding procedure advice and rigorous quality assurance measures such as heat traceability, positive material identification (PMI) and detailed dimensional and test documentation.
Types of Hastelloy C276 Pipes
Match product form to duty: Hastelloy C276 Seamless Pipe (ASTM B622) for high-integrity pressure lines and Hastelloy C276 Welded Pipe/Tube (ASTM B619/B626) for economical large-OD runs. Use this table to balance pressure class, cleanliness and budget, including square/rectangular hollows and ERW/EFW constructions with qualified procedures.
Hastelloy C276 Pipe
UNS N10276 Welded Pipe
Alloy C276 Seamless Pipe
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.
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.
Manufacturing Process of Hastelloy C276 Pipes
Producing Hastelloy C-276 pipes and tubes demands precision metallurgy and stringent process control to preserve the alloy’s corrosion resistance, mechanical strength and weldability. Starting from primary melting to final inspection, every step is governed by international standards such as ASTM B622, B619 and B626 to deliver defect-free, dimensionally accurate and fully traceable products. To understand how we achieve consistent quality and code compliance for critical service applications, find below the step-by-step manufacturing process followed for Hastelloy C-276 Pipes and Tubes:
Primary melting (VIM → VAR/ESR) : Controlled Vacuum Induction Melting for low gas and tight chemistry, followed by VAR/ESR where specified. This stabilizes UNS N10276 composition (low C/Si) so Hastelloy C276 Pipe / Tube delivers reliable as-welded corrosion resistance.
Billet conversion & conditioning : Ingots are hot-forged/rolled to sound billets or hollows, surface-peeled/turned and UT scanned. This removes laps/inclusions and ensures defect-free feedstock for ASTM B622/B619/B626 production.
Seamless route: hollowing & reduction (ASTM B622) Mannesmann piercing or extrusion creates the hollow, then hot-roll + cold pilger/draw brings OD/WT to target. Intermediate anneals maintain ductility while achieving tight ovality for Hastelloy C276 Seamless Pipe/Tube.
Seamless route: final sizing & straightening Precision sizing rolls and straighteners control OD/WT/ID and bow. The result is leak-tight C276 seamless with smooth IDs for heat-exchanger and instrumentation duties.
Welded route: strip prep & forming (ASTM B619/B626) Nickel-alloy strip is slit, edge-trimmed, degreased and roll-formed to cylinder. Clean edges and stable forming deliver consistent fit-up for Hastelloy C276 Welded Pipe/Welded Tube.
Welded route: fusion welding & bead conditioning GTAW/PAW/Laser/EFW with C-276-matching filler (e.g., ERNiCrMo-4) produces a full-penetration seam. ID/OD bead is controlled or scarfed where required for flow, then documented per WPS/PQR.
Solution / bright anneal (all routes) : Mill/solution anneal ~1120-1160 °C with rapid quench or BA in protective atmosphere. This restores corrosion performance across the HAZ and suppresses deleterious phase formation in Alloy C276.
End finishing & preparation (PE/BE/TE) : Ends supplied Plain End, Bevel End (e.g., 37.5°) or Threaded (NPT/BSPT) to drawing. Accurate end prep speeds fabrication of Hastelloy C276 Pipes for ASME B31.3/B31.1 service.
Cleaning, descaling & passivation : Inhibited pickling or mechanical descaling removes scale; optional passivation/electropolish for clean ID. This supports fouling control and hygienic requirements on C276 tubes.
Non-destructive examination (NDT) : Eddy-current for thin walls, ultrasonic for heavy sections and radiography on weld seams as ordered. NDT confirms wall soundness and seam integrity for Seamless and Welded C276.
Mechanical & leak testing : Tensile/yield/elongation, flattening/flaring/flange, hardness as per ASTM B751; hydrostatic or pneumatic leak tests with defined hold times. Results are logged against heat/lot for each Hastelloy C276 Pipe/Tube.
Dimensional verification & tolerances : OD, WT, ID, ovality, straightness and length checked to ASTM B829 or tighter project drawings. This ensures code-ready fit-up and repeatable spooling.
Marking, documentation & certification : Stencil includes grade (Alloy C-276 / UNS N10276), size, schedule/gauge, heat/lot and PO. Full EN 10204 3.1 MTCs, PMI and NDT reports are compiled into the MDR for audit trails.
Protection, packing & export logistics : Drying, end caps, VCI wraps and fumigated pallets/crates with barcode traceability. Export-ready packing protects Hastelloy C276 Pipes & Tubes through transit and site handling.
Value-added operations (on request) : U-bending to controlled radii, close-tolerance honing/polishing, spool fabrication, branch outlets and coded welding with C-276 fillers. These services compress installation schedules and ensure turnkey delivery.
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 Choose Stellar Alloys for Hastelloy C276 Pipes & Tubes?
Selecting the right partner for Hastelloy C276 Pipe and Hastelloy C276 Tube (UNS N10276 / Alloy C276, DIN 2.4819) decides schedule certainty, audit success and runtime. Stellar Alloys blends deep, application-ready stock of Hastelloy C276 Seamless Pipe and Hastelloy C276 Welded Pipe with rigorous QA/QC, code documentation and export logistics delivering predictable performance and lower total installed cost on Hastelloy C276 Pipes & Tubes projects.
Certified Alloy C276 every time: We supply Hastelloy C276 Pipe / Tube with EN 10204 3.1 MTCs, 100% PMI correlation and compliance to ASTM B622/B619/B626 (tests per B751, general per B829) ready for ASME B31.1/B31.3 dossiers.
Application-ready inventory & finishes: Broad stock in C276 Seamless Pipe (SCH 5S-160) and C276 Welded Pipe, plus seamless/welded tube, square/rectangular hollows; BA/AP finishes, U-bends, cut-to-length and spool fabrication for rapid mobilization.
Dimensional precision & clean IDs: Tight OD/WT/ovality and smooth IDs on Alloy C276 tubing reduce fouling and pressure drop in exchangers and instrumentation, improving run lengths and reliability.
Welding & QA discipline built in: Qualified WPS/PQR, controlled interpass, solution anneal on welded product; optional RT/UT/EC + hydro ensure repeatable seam integrity on Hastelloy C276 Welded Pipe.
Engineering support + export logistics: Assistance with wall selection, temperature derates and corrosion pairing (FGD, mixed acids, sour service), plus complete MDR packs, correct HSN paperwork, sea-worthy packing and JIT programs for Hastelloy C276 Pipes & Tubes.
Frequently Asked Questions About Hastelloy C276 Pipe
Generally non-magnetic in the annealed state (austenitic structure; μᵣ≈1.001). Cold work can increase response slightly.
ASTM B622 (seamless pipe/tube) and ASTM B619 (welded pipe); ASTM B626 for welded tube; ASTM B751 tests; ASTM B829 general requirements.
Yes, C-276 is widely selected for mixed acid/chloride environments, including HCl (within appropriate concentration/temperature limits). Its Ni-Cr-Mo-W balance offers strong resistance to pitting/crevice/SCC in chlorides; consult media-specific isocorrosion data for final selection.
