Hastelloy C22 Pipe & Tube
The Stellar Alloys Steel Pipes and Tubes are the suppliers of Hastelloy C22 pipes & tubes installed in the pipe systems that are exposed to aggressive chlorides and mixed acids as well as oxidising and reducing environments. Alloy 22 (UNS N06022), or Hastelloy C22, is a superior material in the resistance to pitting corrosion, crevice corrosion, and stress corrosion cracking, which guarantees long-term service in highly corrosive environments.
Incorporating seamless pipes made of Hastelloy C22 is done in line with the ASTM B622 and is commonly applied in high-integrity process piping, heat exchangers and essential transfer lines that require resistance to corrosion. The pipes have an external diameter and wall thickness which are controlled as per ASME B36.19, and they are delivered in the solution-annealed state so that the corrosion-resistant properties of the pipes should remain intact.
Hastelloy C22 welded pipes can also be provided depending on the size and usage needs, i.e., in accordance with ASTM B619, and welded tubes used in utility and heat exchanger services are offered according to ASTM B626. Every Hastelloy C22 pipe product will be supported by EN 10204 3.1 material test certificates, and PMI testing is also provided on request to guarantee traceability and project compliance.
Hastelloy C22 is widely applied in the chemical processing, pharmaceutical utilities, pollution control systems and marine environments because of its high performance.
Table of Contents
- What Is Hastelloy C22 Pipe and Alloy 22 Material ?
- Hastelloy C22 Pipe Specifications
- Types of ASTM B622 Hastelloy C22 Seamless & Welded Pipe
- Chemical Composition of Hastelloy C22 Pipe (UNS N06022)
- Mechanical Properties of Hastelloy C22 Pipe UNS N06022
- Hastelloy C22 Seamless Pipe Weight Chart (Indicative, density ≈ 8.69 g/cm³)
- Hastelloy C22 Pipe Schedule and Wall Thickness ASME B36.19
- Hastelloy C22 (DIN 2.4602) Welded Pipe Pressure Rating (Indicative @ 38 °C / 100 °F)
- Available Hastelloy C22 Tubing Sizes
- Hastelloy C22 Pipe Equivalent Standards
- Hastelloy C22 Pipe Price
- Applications of Hastelloy C22 Pipe
- Frequently Asked Questions About Hastelloy C22 Pipe and Tube
Hastelloy C22 Pipe ASTM B622 UNS N06022
Hastelloy C22 pipe is produced by Alloy 22 UNS N06022. A nickel-chromium-molybdenum-tungsten alloy developed to withstand extreme corrosion environments such as chlorides, mixed acids, and oxidising or reducing media. This is a very common grade of Hastelloy pipe whose applications are in cases where pitting, crevice corrosion and stress corrosion cracking resistance are needed over a long period to maintain its reliability in service application.
Hastelloy C22 seamless pipe is supplied in Stellar Alloys Steel Pipes and Tubes and is applied in chemical processing lines, acid transfer systems, heat exchangers and high-integrity process piping in accordance with the ASTM B622. The seamless pipes are made with a controlled outer diameter and wall thickness and are supplied in the solution annealed state to ensure corrosion stability and metal-making uniformity. In the event of applications that need different corrosion profiles, other related grades, including Hastelloy C276 pipe, are also to be specified as part of the Hastelloy family.
Hastelloy C22 welded pipe, depending on size and application needs, may be supplied to ASTM B619, with welded tubing supplied to ASTM B626 to be utilised in the service of utilities and exchangers. Pipes are shipped in the UNS N06022/WNR 2.4602 in the service of EN 10204 testing 3.1 MTC and PMI testing that is required in critical industrial applications where Hastelloy pipe service is a vital factor.
What Is Hastelloy C22 Pipe and Alloy 22 Material ?
Oxidising acids and reducing conditions and chloride environments are both highly resisted with the high chromium content, and the stability is increased with molybdenum and tungsten. This tradeoff chemistry is what has allowed Hastelloy C22 pipe to be a favourite in the replacement of traditional stainless steels and duplex grades in process-critical piping.
The pipes are normally provided in mill-annealed form in order to obtain uniform corrosion strength, ductility, and weldability. Hastelloy C22 pipe and hastelloy C22 tube is popular in chemical processing lines, heat exchangers, scrubbers, instrumentation loops, pharmaceutical utilities, marine services, and pollution control systems where long-life material stability and metal stability are critical.
Hastelloy C22 Pipe Specifications
Use this overview to match your RFQ and MDR with the correct Hastelloy C22 pipe and tube standards. UNS N06022 / Alloy C22 is supplied in seamless (ASTM B622) and welded (ASTM B619/B626) forms with ASTM B775 testing and ASTM B829 requirements, along with multiple end forms, finishes, and dimensional options.
| 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
Hastelloy UNS N06022 Welded Pipe
ASTM B622 Hastelloy C22 Seamless Pipe
Hastelloy WERKSTOFF NR. 2.4602 ERW Pipe
ASME SB622 Hastelloy C22 Round Pipe
C22 Hastelloy Hollow Pipe
Hastelloy alloy C22 Rectangular Pipe
Hastelloy DIN NR. 2.4602 Square Pipe
Cold Drawn Hastelloy 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.
| 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 Pipe UNS N06022
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 and Wall Thickness ASME B36.19
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 Steel Pipes and Tubes 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.
Hastelloy C22 Pipe Price
Product Type | Standard | Size Range | Schedule / Thickness | Price |
Hastelloy C22 Seamless Pipe | ASTM B622 | 1/2″ NB to 8″ NB | SCH 10S to SCH 160 | |
Hastelloy C22 Welded Pipe | ASTM B619 | 1/2″ NB to 24″ NB | SCH 10S to SCH 80S | |
Hastelloy C22 Welded Tube | ASTM B626 | 6 mm to 152 mm OD | As specified | |
Hastelloy C22 Square Pipe | ASTM B622 / B619 | Custom sizes | As specified | |
Hastelloy C22 Rectangular Pipe | ASTM B622 / B619 | Custom sizes | As specified | |
Cold Drawn Hastelloy C22 Pipe | ASTM B622 | As per requirement | Tight tolerance |
Note:
Hastelloy C22 pipe pricing depends on size, wall thickness, manufacturing method (seamless or welded), quantity, surface finish, inspection requirements, and current alloy raw material costs. Prices may vary based on specification, delivery timeline, and testing scope.
For accurate pricing, please share your required size, schedule, standard, and quantity.
Applications of Hastelloy C22 Pipe
Hastelloy C22 pipe is used in severe corrosion service piping systems where resistance to chlorides, mixed acids, and oxidizing or reducing media is required for long-term reliability. The alloy is commonly selected for high-integrity process piping in industries where conventional stainless steels are inadequate.
- Chemical Processing and Mixed Acid Piping : Used in acid transfer lines, reactor feed piping, headers, and distribution manifolds handling sulfuric, hydrochloric, nitric, and mixed acid streams.
- Chlorination and Oxidizing Media Systems : Applied in dry and wet chlorine piping, hypochlorite lines, and oxidizing chemical transfer systems exposed to localized corrosion.
- Heat Exchanger and Condenser Piping : Hastelloy C22 pipe is used on the pipe-side of heat exchangers and condenser circuits carrying acidic, brine, or chloride-bearing fluids.
- FGD Scrubber and Pollution Control Piping : Specified for absorber loops, slurry lines, and recycle piping operating in chloride-rich and oxidizing environments.
- Pharmaceutical and Specialty Process Piping : Selected for aggressive process piping and utility lines where corrosion resistance, clean surfaces, and material traceability are critical.
- Hydrometallurgy and Acid Leach Piping : Used in leach lines and transfer piping in acidic and chloride-bearing extraction processes.
Why Choose Stellar Alloys Steel Pipes and Tubes for Hastelloy C22 Pipe
Stellar Alloys Steel Pipes and Tubes supplies Hastelloy C22 pipe in Alloy 22 UNS N06022 for corrosion-critical piping applications requiring documented quality and specification compliance.
- Certified Material and Traceability : All Hastelloy C22 pipes are supplied with EN 10204 3.1 MTC and PMI testing as specified, supporting project documentation and inspection requirements.
- ASTM B622 Seamless Pipe Capability : We specialise in supplying Hastelloy C22 seamless pipe as per ASTM B622, suitable for high-integrity process piping and corrosive service conditions.
- Dimensional Control and Surface Finish : Pipes are supplied with controlled OD and wall thickness, in AP and BA finishes, supporting reliable fabrication and long-term service performance.
- Inspection and Testing Options : PMI, hydrostatic testing, eddy current testing, and dimensional inspection are available as per project requirements.
- Application and Documentation Support : Our team assists with material selection, specification alignment, and documentation review for chemical processing, pharmaceutical, and pollution control piping systems.
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Frequently Asked Questions About Hastelloy C22 Pipe and Tube
Hastelloy C22 or Alloy 22 or UNS N06022 is a nickel chromium molybdenum tungsten alloy that is used in critically corrosive conditions. It has very good resistance to pitting crevice attack and stress corrosion cracking in both oxidizing and reducing media that is commonly used in the chemical and chloride rich industries.
Hastelloy C22 and Hastelloy C276 have good corrosion resistance but C22 tends to perform better in cases of oxidizing and mixed acid environments because it contains more chromium. C276 is very effective in improving situations. Choosing is based on operating media temperature and stability of alloys that are needed.
Alloy C22 has much better corrosion resistance than Stainless Steel 316 particularly in chloride containing oxidizing and mixed acidic conditions. C22 is resistant to pitting and crevice corrosion 316 usually fails. It has aggressive chemical services, high temperatures and hostile chemistries of processes beyond stainless steel capability.
Hastelloy C22 Pipe and Tube are used in chemical reactors scrubbers off gas systems heat exchangers condensers chlorination units CIP and SIP loops marine environments hydrometallurgy systems and pollution control circuits. The alloy maintains stability across mixed acids chlorides and high temperature oxidizing and reducing media.
Yes, in tough and high chloride working conditions Hastelloy alloys like C22 perform a lot better than stainless steel. Hastelloy alloys are resistant to both pitting crevice corrosion and to stress corrosion cracking in harsh oxidizing and reducing environments where the stainless steels such as 304 or 316 will readily corrode.