Views: 5 Author: Site Editor Publish Time: 2025-06-16 Origin: Site
Hastelloy C22 Pipe refers to pipes made of Hastelloy C22 alloy. Hastelloy C-22 is a nickel-based high-temperature alloy containing elements such as nickel, molybdenum, cobalt, and tungsten, with a nickel content of about 60%. Hastelloy C22 alloy has good resistance to pitting, crevice corrosion, and stress corrosion cracking. It has excellent oxidation resistance in aqueous media, including wet chlorine, nitric acid, or mixed acids containing oxidizing acids containing chloride ions. At the same time, Hastelloy C22 (N06022) Hastelloy alloy also has the ideal ability to resist the reducing and oxidizing environments encountered during processing. With this versatile performance, it can be used in some troublesome environments or in various production target plants.
1.Resistance to pitting and crevice corrosion: Due to the content of molybdenum and tungsten, it has extremely high resistance to localized corrosion (such as pitting and crevice corrosion) in chloride-containing environments.
2.Resistance to stress corrosion cracking (SCC): Excellent resistance to stress corrosion cracking caused by chlorides.
3.Excellent mechanical properties: With high strength and good toughness, it can maintain structural integrity under high pressure and certain temperature conditions.
4.Good weldability: Hastelloy C22 pipe is not prone to forming grain boundary precipitates in the weld heat affected zone (HAZ), so it can be used directly in the "welded state" without post-weld solution treatment, which greatly simplifies the manufacturing process and reduces costs.
5.Thermal stability: It has excellent oxidation resistance in oxidizing atmospheres up to 1040°C (1900°F), but it is generally recommended to be used for a long time at temperatures below 677°C (1250°F) to maintain its best corrosion resistance.
ASTM/ ASME Specification | ASTM B622 |
Shapes | Hastelloy UNS N06022 Round, Rectangular, Square, Hydraulic, Straight, "U" Shape, Coiled, Honed Tubes, Pan Cake Coils |
Manufacturing Type | Seamless / ERW / Welded / Fabricated / CDW / CDS / DOM / CEW / 100% X Ray Welded |
Thickness Range | SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXH, SCH XXS, SCH XS |
Swg & Bwg | 10 Swg., 12 Swg., 14 Swg., 16 Swg., 18 Swg., 20 Swg. |
Standard | SUS, JIS, AISI, ASTM, GB, DIN, EN |
END | Plain End, Beveled End, Treaded Hastelloy Alloy C22 Tube |
Hastelloy C22 | Ni | C | Mo | Mn | Si | Fe | P | S | Co | Cr | W |
Balance | 0.05-0.15 | 8.0-10.0 | 1.0 | 1.0 | 17.0-20.0 | 0.04 | 0.03 | 0.5-2.5 | 20.5-23 | 0.2-1.0 |
Density | Melting Point | Yield Strength (0.2%Offset) | Tensile Strength | Elongation |
8.69 g/cm3 | 1399 °C (2550 °F) | Psi – 45000 , MPa – 310 | Psi – 1,00,000 , MPa – 690 | 45% |
STANDARD | WERKSTOFF NR. | UNS | JIS | EN |
Hastelloy C22 | 2.4602 | N06022 | NW 6022 | NiCr21Mo14W |
Seamless pipe manufacturing
In the manufacturing of seamless Hastelloy C22 pipe, first, nickel, chromium, molybdenum and other alloy raw materials are made into ingots by vacuum induction melting or electroslag remelting to ensure uniform composition. Then the ingot is heated to 1150-1200℃, and the core shaft is inserted into the center of the ingot by a piercing machine to form a hollow tube blank, which is then initially formed by hot rolling and hot extrusion; then cold rolling or cold drawing is used, and multiple diameter reduction and wall reduction operations are performed to achieve high-precision dimensional requirements.
Welded pipe manufacturing
In the manufacturing of welded Hastelloy C22 pipe, the alloy is first made into strips or plates, and then the surface impurities are removed by cleaning treatment, and then the strips are bent into tubes by roll forming and other methods, and then the pipe seams are fused by welding processes such as electric resistance welding (ERW) or electric fusion welding (EFW). After welding, the weld is subjected to non-destructive testing such as radiographic testing to check for defects such as pores and unfused, and size calibration and surface treatment (pickling and passivation) are performed at the same time.
Seamless Hastelloy C22 Pipe
Welded Hastelloy C22 Pipe
Nominal Pipe Size,in. | Outside Diameter | Schedule No.10 | Nominal Wall Thickness | Schedule No.80 |
Inches | ||||
1/4 | 0.540 | 0.065 | 0.088 | ... |
3/8 | 0.675 | 0.065 | 0.091 | 0.126 |
1/2 | 0.840 | 0.083 | 0.109 | 0.147 |
3/4 | 1.050 | 0.083 | 0.113 | 0.154 |
1 | 1.315 | 0.109 | 0.133 | 0.179 |
1 1/4 | 1.660 | 0.109 | 0.140 | 0.191 |
1 1/2 | 1.900 | 0.109 | 0.145 | 0.200 |
2 | 2.375 | 0.109 | 0.154 | 0.218 |
2 1/2 | 2.875 | 0.120 | 0.203 | 0.276 |
3 | 3.500 | 0.120 | 0.216 | 0.300 |
Millimeters | ||||
1/4 | 13.72 | 1.65 | 2.24 | ... |
3/8 | 17.14 | 1.65 | 2.31 | 3.20 |
1/2 | 21.34 | 2.11 | 2.77 | 3.73 |
3/4 | 26.67 | 2.11 | 2.87 | 3.91 |
1 | 33.40 | 2.77 | 3.38 | 4.55 |
1 1/4 | 42.16 | 2.77 | 3.56 | 4.85 |
1 1/2 | 48.26 | 2.77 | 3.68 | 5.06 |
2 | 60.32 | 2.77 | 3.91 | 5.54 |
2 1/2 | 73.02 | 3.05 | 5.16 | 7.04 |
3 | 88.90 | 3.05 | 5.49 | 7.62 |
Chemical and petrochemical industries: Widely used in pipelines, reactors, heat exchangers and valve systems for handling various corrosive acids, chlorination processes, and the production of pesticides, fertilizers and specialty chemicals.
Environmental protection and pollution control: Plays a key role in the flue gas desulfurization (FGD) system of waste incineration plants, especially flue gas scrubbers, flues and fans to resist corrosion containing chloride ions and oxidizing media. It is also commonly used in industrial wastewater treatment.
Pharmaceutical industry: Due to the extremely high requirements for cleanliness and corrosion resistance, Hastelloy C22 Pipe is used in key equipment and pipelines in the pharmaceutical production process to ensure that the product is pure and meets strict industry standards.
Other highly corrosive environments: Including bleaching equipment in the pulp and paper industry, and certain marine and oil and gas applications with high requirements for seawater corrosion resistance.
-Pipe and Tube (EN 10216-5, ASTM A213, ASTM A249, A312, A790,)
-Forged Fitting and Flange (ASTM A182 , ASTM A105,ASTM B564 )
-Butt Weld Fittings (ASTM A234, ASTM A403,ASTM A815)
-Round bar , Billet (ASTM A276, ASTM A479)
- Plate, Sheet, Strip(ASTM A240, EN 10028-7, A480)
-Bolting, Nuts（ASTM A193, A194, A320）
We Export Hastelloy C22 Pipe to Saudi Arabia, United Arab Emirates, Qatar, Bahrain, Oman, Kuwait, Turkey, Egypt, Yemen , Syria, Jordan, Cyprus, Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan, Sri Lanka, Maldives, Bangladesh, Cambodia, Argentina, Bolivia, Brazil, Venezuela, Colombia, Ecuador, Guyana, Paraguay, Uruguay, United States Of America, Canada, Mexico, Panama, Jamaica, Bahamas, Denmark, Norway, Germany, France,Italy, United Kingdom, Spain, Belgium, Greece, Czech Republic, Portugal, Hungary, Albania, Austria, Finland, Ireland, Croatia, Malta, Nigeria, Algeria, Angola, South Africa, Libya, Egypt, Sudan, Europe, Africa, Asia, North America, South America, Middle East.etc
Q1: Can Hastelloy C22 be welded? Is it easy to process?
A: Yes, Hastelloy C22 pipe has good weldability and cold processing capabilities. GTAW (argon arc welding) and GMAW processes are recommended.
Q2: What is the difference between C22 and C276?
A: C22 has stronger oxidation corrosion resistance and is suitable for more complex chemical environments, while C276 is more suitable for strong reducing environments.
Q3: Does your company provide custom sizes and spot goods?
A: Yes. We can process fixed lengths and wall thicknesses on demand. We always have a variety of sizes in stock and support global shipments.
