Hastelloy C22 Pipe Manufacturer and Supplier in India
Steel Pipe & Tubes has been a leading supplier of Hastelloy piping solutions.
Leading Hastelloy C22 Seamless Pipe and Welded Pipe Manufacturer in India and Trusted UNS N06022 Alloy 22 Pipe and Tube Supplier
What Are Hastelloy C22 Pipes and Tubes?
Alloy 22 or Hastelloy C22 is a nickel chromium molybdenum tungsten alloy that has been developed to ensure that it is resistant to severe corrosion conditions. It has a high level of resistance to pitting crevice corrosion and stress corrosion cracking in oxidizing and reducing media. Streams of oxidizing acids are directed to the higher chromium content guards and molybdenum and tungsten enhance the reliability of the reduction of chlorides and mixed acids. Hastelloy C22 Pipes and Tubes are sold in mill annealed form in order to provide balanced ductility, formability, weldability and corrosion stability. They are frequently employed in reactor heat exchangers, condenser scrubber ducting off gas systems and instrumentation loops in the chemical processing pharma marine systems and pollution control systems where long term resistance to corrosion is needed.
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
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. 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 and Hastelloy C22 Tube
Hastelloy C22 Pipe and Hastelloy C22 Tube are used when there is severe corrosion problems where pitting, crevice corrosion and stress corrosion cracking take place whether in oxidizing or reducing conditions. The alloy 22 UNS N06022 offers reliable service in mixed acids, chlorides and high temperature conditions, thus it is a good selection in high-integrity process lines, headers and exchangers, as well as utility circuits. Hastelloy C22 Seamless Pipe and Tube is a product that supports critical tasks that need clean flow paths and highly stable mechanisms whereas Hastelloy C22 Welded Pipe and Tube is a product that provides cost-effective solutions to large diameters and structural manifolds.
Mixed-Acid Reactors and Transfer Lines
The selection of the supplier of Hastelloy C22 Pipe and Hastelloy C22 Tube in Alloy 22 UNS N06022 DIN 2.4602 has a direct influence on the reliability of the code compliance systems and the lifecycle performance. Stellar Alloys guarantees certified Hastelloy C22 Seamless Pipe and Welded Hastelloy C22 Pipe with documented metallurgy full traceability and export ready documentation to deliver the material that is code-compliant and ready to install.
Chlorination and Oxidizing Media Systems
Hastelloy C22 Welded Pipe can be used in a cost-efficient manner in large OD headers in dry or wet chlorine, bleach, and nitric streams. Seamless Tube is used in case of the smaller lines, in which crevice initiation should be limited.
Heat Exchangers and Condensers (Brine and Acid Duty)
Hastelloy C22 Seamless Tube with U-bends helps to mitigate foulings and under-deposits attack in chloride laden condensates. It has been demonstrated to be an alternative to copper alloys and stainless grades in harsh cooling and condensing environments.
FGD Scrubbers and Pollution-Control Circuits
The FGD units are best suited to be used with Hastelloy C22 Pipe as they have chloride-laden and oxidizing wash liquors. Tuba Welded suits are used to bundle and large cooling zones and Seamless Pipe is used in recycle lines and high pressure applications.
Pharmaceutical CIP and Aggressive Utilities
Blends based on sanitizing that contain hypochlorite and peracetic are improved with BA-finished Hastelloy C22 Seamless Tube. Seamless pipe has thermal cycle and oxidizing utility stability in CIP and SIP lines.
Marine and Desalination Services
Where there is seawater intake, RO concentrate and chlorine dosing, Hastelloy C22 Pipe and Tube inhibit localized corrosion at warm aerated conditions. The large manifolds are welded using the spools, when completely solution-annealed.
Pulp and Paper Bleaching Units
The Hastelloy C22 Seamless Pipe and Tube have an advantage over other austenitic and duplex grades in areas of chlorine dioxide and hypochlorites. Smooth BA IDs will assist in decreasing the deposit formation and MIC risk.
Hydrometallurgy and Acid Leach Circuits
UNS N06022 Seamless Pipe is used in chloride-bearing sulfuric systems and Welded Pipe is used in large manifolds that need documented RT, UT and NDT. Corrosive support structures are dealt with by square and rectangular hollows.
Power and Thermal Plants (Brackish and Chlorinated Cooling)
Hastelloy C22 Tube is used in condensers in environments where there are chlorinated or brackish water. Combine with Seamless Pipe on hot service lines which have mixed oxidizers and chlorides.
Waste-Acid Recovery and Quenching Services
High-speed thermal changes, mixed oxidizers are complicated with traditional alloys, Hastelloy C22 Seamless Pipe is tough and resists corrosion. Welded Tube is applicable to large coolers that should be cleaned after the welding.
Water Treatment and Chlorination Skids
Hastelloy C22 Tube BA finished is used in the generation of hypochlorites and dosing loops. Seamless Pipe provides pressure integrity and in oxidizing chloride combination, SCC resistance.
Instrumentation and High-Purity Service Loops
Hastelloy C22 Seamless Tube and Controlled surface finish is used in chemical lines, specialty lines and high purity lines that require low-contamination flows. Validation and commissioning are made easy with tight tolerances and PMI traceability.
Why Choose Us as Your Hastelloy C22 Pipe and Tube Supplier
The selection of the supplier of Hastelloy C22 Pipe and Hastelloy C22 Tube in Alloy 22 UNS N06022 DIN 2.4602 has a direct influence on the reliability of the code compliance systems and the lifecycle performance. Stellar Alloys guarantees certified Hastelloy C22 Seamless Pipe and Welded Hastelloy C22 Pipe with documented metallurgy full traceability and export ready documentation to deliver the material that is code-compliant and ready to install.
- Certified Alloy 22 Material Accountability
Each Hastelloy C22 Pipe and Tube shall be made available with EN 10204 3.1 MTCs (full) PMI and full conformity to ASTM B622 ASTM B619 and ASTM B626 with testing by ASTM B775 and general requirements by ASTM B829. Documentation complies with ASME B31.3 and B31.1 to enable buyers, engineers and inspectors to get quality records clearly. - Large Inventory and Multiple Finishing Options
Our inventory includes prepared stock in Hastelloy C22 Seamless Pipe in SCH 5S to SCH 160 and Hastelloy C22 Welded Pipe as well as seamless and welded tube in round square and rectangular sizes. The finishes are Bright Annealed BA and the Annealed and Pickled AP as well as U bend tubes and supply cut to length to minimize fabrication time and field welding. - Dimensional Precision and Proven Flow Performance
Alloy 22 tubing is fabricated to tight control OD and wall thickness and small roughness IDs to minimize foul and under deposit corrosion. This enhances throughput and prolongs exchanger condensers and instrumentation loops where stable performance is needed. - Qualified Welding and Advanced NDT
The production of Hastelloy C22 Welded Pipe is done through procedure qualified welding as well as with fillers of ERNiCrMo 4 class controlled the interpass temperature and post weld cleaning. Optional RT UT EC and hydro or pneumatic testing provide service to the demanding chloride and mixed acid service with integrity in the weld. - Engineering Support and Global Logistics
Our team assists the customers in terms of guidance on oxidizing and reducing chlorides CIP and SIP chemistries wall thickness selection and temperature derates of UNS N06022. Audits procurement and scheduling of Hastelloy C22 Pipes and Tubes are made easy through export grade packing MDR documentation HSN compliant invoicing and JIT delivery.
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.
