Hastelloy C22 Pipe
Steel Pipe & Tubes has been a leading supplier of Hastelloy piping solutions.
Stellar Alloys manufactures and stocks Hastelloy C22 pipes and tubes for aggressive chlorides, mixed acids, and services that cycle between oxidizing and reducing conditions. Back by 25+ years of experience, we supply UNS N06022, W.Nr. 2.4602, across chemical processing, pharmaceuticals, marine, power, and pollution-control applications. The program includes seamless pipe to ASTM B622 and welded pipe or tube to ASTM B619 and ASTM B626. Products are finished to tight OD and WT tolerances with BA or AP finishes and full heat traceability. Shapes include round, square, and rectangular hollows. We also provide cut-to-length pieces, U-bends for heat exchangers, and spooled assemblies. Orders ship with EN 10204 3.1 MTCs and PMI, along with code-ready documentation for ASME B31.3 and B31.1.
Leading Hastelloy C22 Seamless & Welded Pipe Manufacturer in India - Trusted UNS N06022 / Alloy C22 Tubing Supplier
What Are Hastelloy C22 Pipes & Tubes?
Hastelloy C-22 (Alloy 22) is a nickel-chromium-molybdenum-tungsten alloy with strong resistance to pitting, crevice corrosion, and stress-corrosion cracking. Higher chromium supports oxidizing acids, while molybdenum and tungsten strengthen performance in reducing media. Material is supplied mill annealed to balance ductility, formability, and corrosion resistance. Common uses include reactors, heat exchangers and condensers, scrubbers and columns, ducting, off-gas systems, and instrumentation in chloride-rich and mixed-acid environments.
Hastelloy C22 Tube Specification
Use this snapshot to align your RFQ and MDR with the correct Hastelloy C22 Tube and Hastelloy C22 Pipe standards. We manufacture and supply UNS N06022 / Alloy C22 in seamless (ASTM B622) and welded (ASTM B619/B626) forms with testing per ASTM B775 and general requirements ASTM B829. End forms, finishes, and dimensional systems are summarized here for quick, code-ready selection.
| Parameter | Details |
| Grades / IDs | Hastelloy® C-22® / UNS N06022 / W. Nr. 2.4602 |
| Product forms | Seamless pipe & tube (ASTM B622), Welded pipe (ASTM B619), Welded tube (ASTM B626); mechanical tests per ASTM B775; general requirements ASTM B829 |
| Delivery | Mill Annealed / Bright Annealed / Annealed & Pickled (AP) |
| Ends | Plain End (PE), Bevel End (BE), Threaded (TE) |
| Dimensions | Round, square, rectangular; round pipes typically to ASME B36.19 |
| Compliance | Code listings in ASME sections and B31.3 service temperatures; see alloy datasheet. |
Types of ASTM B622 Hastelloy C22 Seamless & Welded Pipe
Choose the right Hastelloy C22 Pipe / Tube for your media and temperature window. This matrix links seamless (ASTM B622) and welded (ASTM B619/B626) product forms to typical applications so you can balance corrosion performance, pressure class, and budget. Use it to fast-track selection of UNS N06022 round, square, and rectangular hollows.
Hastelloy C22 Pipe
UNS N06022 Welded Pipe
Alloy C22 Seamless Pipe
Chemical Composition of Hastelloy C22 Pipe (UNS N06022)
Chemistry drives corrosion resistance in Alloy C22. The table below lists the wrought limits (Ni-Cr-Mo-W with controlled Fe/Co/C/Si/Mn) for Hastelloy C22 Pipe and Hastelloy C22 Tube used in aggressive oxidizing/reducing environments. Use these ranges for PMI correlation, corrosion modeling, and MTC verification.
| Element | Ni | Cr | Mo | W | Fe | Co | C | Mn | Si | V | Cu |
| % (limits) | Balance | 20.0-22.5 | 12.5-14.5 | 2.5-3.5 | 2.0-6.0 | ≤2.5 | ≤0.015 | ≤0.50 | ≤0.08 | ≤0.35 | ≤0.50 |
Limits per producer datasheets for wrought C-22 (pipe & tube product families).
Mechanical Properties of Hastelloy C22 Tubing (Room Temperature, Solution-Annealed)
Here are indicative room-temperature mechanicals for Hastelloy C22 in the mill-annealed condition like tensile, yield, elongation and hardness. Values support preliminary sizing and code checks for UNS N06022 seamless and welded tubing; confirm size/condition-specific results on your MTC for final design.
| Property | Minimum / Typical |
| Tensile strength, Rm | 690-950 MPa (100-138 ksi) |
| Yield strength, Rp0.2 | ≥ 310 MPa (45 ksi) |
| Elongation (A5) | ≥ 45% |
| Hardness | ≤ 240 HB (typical) |
Representative values from mill datasheets for solution-annealed C-22 (2.4602).
Hastelloy C22 Seamless Pipe Weight Chart (Indicative, density ≈ 8.69 g/cm³)
Estimate handling, supports, and freight using this Hastelloy C22 Seamless Pipe weight chart (density ≈ 8.69 g/cm³). Dimensions follow common ASME B36.19 practice used for nickel alloys. Use these figures for take-offs, then validate against approved drawings and tolerances before release.
| NPS | OD (mm) | WT (mm) | Sch | Approx. kg/m |
| 1/2″ | 21.34 | 2.77 | 40S | 1.29 |
| 1/2″ | 21.34 | 3.73 | 80S | 1.65 |
| 3/4″ | 26.67 | 2.87 | 40S | 1.71 |
| 3/4″ | 26.67 | 3.91 | 80S | 2.23 |
| 1″ | 33.40 | 3.38 | 40S | 2.54 |
| 1″ | 33.40 | 4.55 | 80S | 3.29 |
| 2″ | 60.33 | 3.91 | 40S | 5.52 |
| 2″ | 60.33 | 5.54 | 80S | 7.60 |
| 4″ | 114.30 | 6.02 | 40S | 16.32 |
| 6″ | 168.28 | 7.11 | 40S | 28.69 |
| 8″ | 219.08 | 12.70 | 80S | 65.63 |
(Industry weight charts for C22/C-276/C-2000 use the same ASME B36.19 geometry with Ni-alloy density; values representative.)
Hastelloy C22 Pipe Schedule & Wall Thickness Chart (Common B36.19 Schedules)
Select the appropriate wall quickly with this ASME B36.19 schedule chart for Hastelloy C22 Pipe. It maps common 10S/40S/80S/160 thicknesses across popular NPS, helping you coordinate pressure class, machining allowances, and availability for UNS N06022 builds.
| NPS | 10S (mm) | 40S (mm) | 80S (mm) | 160 (mm) |
| 1/2″ | 2.11 | 2.77 | 3.73 | – |
| 3/4″ | 2.11 | 2.87 | 3.91 | – |
| 1″ | 2.77 | 3.38 | 4.55 | 6.35 |
| 1¼″ | 2.77 | 3.56 | 4.85 | 6.35 |
| 1½″ | 2.77 | 3.68 | 5.08 | – |
| 2″ | 2.77 | 3.91 | 5.54 | 8.74 |
| 3″ | 3.05 | 5.49 | 7.62 | 11.13 |
| 4″ | 3.05 | 6.02 | 8.56 | 13.49 |
(Thicknesses per ASME B36.19 dimensional practice widely used by C22 suppliers.)
Hastelloy C22 (DIN 2.4602) Welded Pipe Pressure Rating (Indicative @ 38 °C / 100 °F)
Use these indicative ratings to screen Hastelloy C22 Welded Pipe for low-temperature service (≈ 38 °C / 100 °F). Values reflect thin-wall approximations and typical nickel-alloy allowables; finalize per ASME B31.3/B31.1 using Section II-D stresses, joint efficiency, temperature derates, and your exact geometry.
| NPS | OD × WT (mm) | Seamless (E=1.0) bar | Welded (E=0.85) bar |
| 1″ | 33.4 × 3.38 (Sch 40S) | 260 | 221 |
| 2″ | 60.3 × 3.91 (Sch 40S) | 190 | 162 |
| 3″ | 88.9 × 5.49 (Sch 40S) | 220 | 187 |
| 4″ | 114.3 × 6.02 (Sch 40S) | 210 | 179 |
(Methodology per B31.3 examples; allowable-stress basis from ASME Section II-D tables for N06022 / Alloy 22.)
Available Hastelloy C22 Tubing Sizes
Stellar Alloys stocks and manufactures Hastelloy C22 Seamless Tube (ASTM B622) and Hastelloy C22 Welded Tube (ASTM B626) in a broad OD/WT window. Choose straight lengths, coils, or U-bends to compress layouts and reduce joints. Use this table to match OD, wall/gauge, and length to your duty.
| Form | OD range (mm) | Wall (mm) / Gauge | Typical length |
| Seamless Tube (B622) | 6.0 – 114.3 | 0.8 – 12.7 (≈ 25-10 SWG) | Straight up to ~26 m; coils/U-bends on request |
| Welded Tube (B626) | 6.0 – 152 | ≈ 0.7 – 3.25 (22-10 gauge) | Straight ~6 m; U-bends available |
Supplier-reported ranges for N06022 tubing.
UNS N06022 Pipe Heat Treatment & Surface Finish
Heat treatment and surface prep are critical to preserve Alloy C22 corrosion performance. This section outlines standard Mill Anneal (MA) and Bright Anneal (BA) practices plus AP/polished finishes for clean IDs and reliable welding. Specify your required condition to align fabrication and service life.
Mill Anneal (MA): ~1121 °C (2050 °F), rapid quench; re-anneal after significant cold work (>7% outer fiber elongation).
Surface options: AP (Annealed & Pickled), BA (Bright Annealed), polished 180-600 grit; clean ID for fouling control.
Hastelloy C22 Pipe Equivalent Standards
Cross-reference Hastelloy C22 designations here to keep drawings, POs, and QA synced. The table maps UNS N06022 to DIN 2.4602 and lists common product standards (ASTM B622/B619/B626, B775, B829) so multi-region documentation stays consistent.
| System | Designation |
| UNS | N06022 |
| Werkstoff/DIN | 2.4602 |
| Trade names | Hastelloy® C-22®, VDM® Alloy 22 |
| Common ASTM | B622 (seamless), B619 (welded pipe), B626 (welded tube), B775 (mech. tests), B829 (general requirements) |
HS Code & Export Information for Alloy NW 6022 Pipe (India)
Classify Hastelloy C22 Pipe and Hastelloy C22 Tube correctly for India shipments with these HSN references. Entries cover nickel-alloy tubes/pipes and associated fittings commonly supplied with UNS N06022 spools. Always confirm the final HSN and GST with your customs broker.
| Product form | HSN code (India) | Official description | Typical applicability | GST* |
| Nickel-alloy tubes & pipes | 7507 12 00 | “Nickel tubes and pipes of nickel alloys” | Hastelloy C22 seamless/welded pipe & tube, square/rectangular | 18% |
| Nickel tube/pipe fittings | 7507 20 00 | “Nickel tube or pipe fittings (couplings, elbows, sleeves)” | Alloy 22 elbows, tees, reducers, nipples, bush hex | 18% |
Verify final classification and taxability with your customs broker and current notifications.
Applications of Hastelloy C22 Pipe & Tubing
Engineered for extreme chemistries, Hastelloy C22 Pipe and Hastelloy C22 Tube (UNS N06022) deliver dependable resistance to pitting, crevice attack, and SCC in both oxidizing and reducing media. Whether you choose Hastelloy C22 Seamless Pipe/Tube for high-integrity lines or Hastelloy C22 Welded Pipe/Tube for large headers, Alloy C22 maintains performance across mixed-acid, chloride-rich, and high-temperature services helping extend equipment life and uptime.
Mixed-acid reactors & transfer lines: Hastelloy C22 Seamless Pipe (UNS N06022) resists simultaneous oxidizing/reducing acids (HCl/HNO₃, H₂SO₄ + chlorides) where stainless steels pit. Use Hastelloy C22 Tube with BA finish for coil/jacket circuits that demand clean IDs and tight ovality.
Chlorination & oxidizing media trains: In dry/wet chlorine, bleach, and nitric systems, Hastelloy C22 Welded Pipe offers a cost-efficient large-OD option provided it is solution-annealed and seam-tested. For smaller lines, specify C22 Seamless Tube to minimize crevice initiation.
Heat exchangers & condensers (brine/acid duty): Hastelloy C22 Seamless Tube with U-bends delivers low-roughness IDs to reduce fouling and under-deposit attack. It’s a common swap-in where Cu-based or stainless tubing fails in chloride-rich condensates.
FGD scrubbers, absorber recycle & stack wash: Flue-gas desulfurization wash liquors are chloride-laden and oxidizing ideal territory for Hastelloy C22 Pipe. Use C22 Welded Tube in bundles and Seamless Pipe on recycle headers to balance integrity and cost.
Pharma CIP/SIP and aggressive utilities: Hypochlorite/peracetic blends and sanitizing regimes benefit from Hastelloy C22 Seamless Tube (BA) for clean, low-Ra flow paths. C22 Seamless Pipe maintains integrity across thermal cycles and mixed oxidizers.
Marine & desalination systems: For seawater intake, RO concentrate, and chlorine dosing, Hastelloy C22 Pipe and Tube mitigate pitting/crevice corrosion at warm, aerated chloride levels. Welded spools are viable for large manifolds; specify full solution anneal.
Pulp & paper bleach plants: Hastelloy C22 Seamless Pipe/Tube outperforms austenitic and duplex grades in chlorine dioxide and hypochlorite zones. Use BA IDs on instrument loops to curb deposit formation and MIC risk.
Hydrometallurgy (acid leach & SX-EW): In chloride-bearing sulfuric circuits, UNS N06022 Seamless Pipe provides high integrity on pressure lines; Hastelloy C22 Welded Pipe suits big-diameter manifolds with documented RT/UT. Square/rect hollows handle corrosive structures.
Power & thermal plants (brackish cooling): Hastelloy C22 Tube in condensers resists localized attack from chlorinated/brackish waters. Pair with C22 Seamless Pipe on critical hot lines that see oxidizers plus chlorides.
Waste-acid recovery & quench services: Rapid thermal swings and mixed oxidizers challenge conventional alloys; Hastelloy C22 Seamless Pipe maintains toughness and corrosion stability. Use C22 Welded Tube for large surface-area coolers with post-weld cleaning.
Water treatment & chlorination skids: For hypochlorite generation/dosing and backwash circuits, Hastelloy C22 Tube (BA) offers clean flow; C22 Seamless Pipe provides pressure integrity and SCC resistance in chloride-oxidizer combinations.
Instrumentation & high-purity loops: Hastelloy C22 Seamless Tube with specified surface finish supports low-contamination service in chemical and specialty lines. Tight tolerances and PMI-traceability simplify validation and maintenance.
Why Choose Us for Hastelloy C22 Tubes & Pipes
Choosing a supplier for Hastelloy C22 Pipe and Hastelloy C22 Tube (UNS N06022 / Alloy 22, DIN 2.4602) affects compliance, uptime, and lifecycle cost. Stellar Alloys combines stocked Hastelloy C22 Seamless Pipe and Hastelloy C22 Welded Pipe with documented metallurgy, process control, and export-ready documentation so your Hastelloy C22 Pipes & Tubes land on site code-ready.
Certified Alloy C22 on every lot: All Hastelloy C22 Pipe / Tube ships with EN 10204 3.1 MTCs, full PMI, and adherence to ASTM B622/B619/B626 (tests per B775/B751, general per B829) aligned to ASME B31.3/B31.1 projects.
Inventory depth & finishing options: Immediate availability in C22 Seamless Pipe (SCH 5S-160), C22 Welded Pipe, and seamless/welded tube, plus square/rectangular sections; Bright Annealed (BA) / Annealed & Pickled (AP), U-bends and cut-to-length to compress schedules.
Precision that protects throughput: Tight OD/WT tolerances and low-roughness IDs on Alloy 22 tubing curb fouling and under-deposit corrosion, extending exchanger runs and stabilizing instrumentation loops.
Proven weld quality & NDT: Procedure-qualified welding with ERNiCrMo-4 class fillers, documented interpass control and post-weld cleaning; optional RT/UT/EC + hydro/pneumatic for assured Hastelloy C22 Welded Pipe performance.
Design help & global logistics: Practical guidance for oxidizing/reducing chlorides, CIP/SIP chemistries and temperature derates, plus MDR packs, compliant HSN invoicing, export-grade packing and JIT deliveries for Hastelloy C22 Tubes & Pipes
Frequently Asked Questions About Hastelloy C22 Pipe / Tube
Both are Ni-Cr-Mo alloys; C22 generally offers higher resistance in oxidizing chloride media due to higher Cr, while C276 is long-proven and widely specified. Selection depends on media and temperature.
“C22 solvent” is a trade term unrelated to the alloy; it typically refers to hydrocarbon solvents with ~C22 carbon number (paint/cleaning products). It is not a Hastelloy C-22.
Minimum yield (0.2% offset) for solution-annealed C-22 tubing is ~310 MPa (45 ksi); tensile strength ~690-950 MPa, elongation ≥45% (size-dependent).
By mitigating pitting/crevice attack and SCC in mixed-acid/chloride environments extending equipment life and enabling higher uptime; its weldability and availability in many forms simplify fabrication.
