Hastelloy C22 corresponds to the American standard material grade ASTM B564 UNS N06022. As a high-performance, highly corrosion-resistant material, it features excellent oxidation resistance, acid and alkali resistance, corrosion resistance, high-temperature performance, and good mechanical properties. Flanges forged from Hastelloy C22 as raw material exhibit exceptional corrosion resistance, capable of withstanding various strong acids, hydrochloric acid, hydrofluoric acid, and other highly acidic solutions, and exhibit exceptional corrosion resistance in acidic environments. Hastelloy C22 flanges also exhibit excellent heat resistance, enabling them to operate reliably in high-temperature environments for extended periods. Additionally, they feature superior mechanical properties, including high hardness, high compressive strength, and excellent wear resistance. As a result, they are widely used in various industries such as petrochemicals, chemicals, and power generation.
Hastelloy Flanges Standard Specification
| Specifications | ASTM B564 / ASME SB564 |
| Grades | Hastelloy C276, C22, C4, C2000, B2, B3, X Flanges |
| Standard | ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc. |
| Size | 1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000 |
| Class / Pressure | 150#, 300#, 600#, 900#, 1500#, 2500# |
| Flange Face Type | Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
ASTM B564 UNS N06022 Hastelloy Flanges Chemical Composition
Hastelloy C22 contains approximately 56% nickel, along with chromium (20-22%), molybdenum (12-14%), tungsten (2.5-3.5%), and other elements, as well as small amounts of iron, cobalt, carbon, silicon, manganese, and other trace elements. This combination of elements gives it exceptional corrosion resistance.
| CHEMICAL | LIMITS | Ni | Fe | Mn | C | Si | S | Cr | Mo | P | W | Co | V |
| Hastelloy C22 | MIN | Balance | 2 | 20 | 12.5 | 2.5 | |||||||
| MAX | 6 | 0.5 | 0.02 | 0.08 | 0.02 | 22.5 | 14.5 | 0.02 | 3.5 | 2.5 | 0.35 |
Mechanical Property of Hastelloy Alloy C22 Flange
In terms of mechanical properties, Hastelloy C22 flanges offer excellent strength and toughness. At room temperature, the tensile strength can reach over 690 MPa, with a yield strength of approximately 310 MPa and an elongation rate exceeding 40%. They can withstand high operating pressures and temperatures, capable of stable operation in environments up to approximately 1093°C. Additionally, after being processed through forging, rolling, and other manufacturing processes, it achieves high dimensional accuracy and precision in seal surface machining, making it compatible with various flange connection standards (such as ANSI, DIN, JIS, etc.), ensuring the integrity and safety of pipeline systems.
| Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| Hastelloy C22 | 8.69 g/cm3 | 1399 °C (2550 °F) | Psi – 1,00,000 , MPa – 690 | Psi – 45000 , MPa – 310 | 45% |
Equivalent Material of C22 Hastelloy Flange
Corrosion Resistance
Hastelloy C22 alloy exhibits exceptional corrosion resistance, particularly in harsh acidic and chlorine-containing environments. It demonstrates extremely high resistance to pitting and crevice corrosion. Experimental results show that the critical pitting temperature of C-22 in a 6% FeCl₃ solution with added acid exceeds 302°F (150°C), significantly outperforming common stainless steels and certain other nickel alloys. Additionally, it exhibits outstanding corrosion resistance against organic acids and strong oxidizing acids. According to available data, C22 alloy is rated as one of the top corrosion-resistant materials, capable of withstanding pitting corrosion, crevice corrosion, stress corrosion cracking, and crevice corrosion in seawater environments. These properties make it superior to many commonly used nickel alloys in various harsh corrosive media, such as FeCl₃, CuCl₂, moist chlorine atmospheres, and seawater.
Common Types of Hastelloy C276 Flanges
| Flange Type | Features / Description |
| Weld Neck Flange | Suitable for high-pressure, high-temperature systems; provides strong and secure connection |
| Slip On Flange | Easy to install; suitable for medium and low pressure applications |
| Blind Flange | Used to close the end of a pipe; ideal for inspection and maintenance |
| Socket Weld Flange | Suitable for small-diameter, high-pressure pipelines |
| Threaded Flange | Ideal for systems where welding is not feasible |
| Lap Joint Flange | Works with stub ends; allows easy alignment and disassembly, suitable for systems requiring frequent maintenance |
Hastelloy C22 Flanges Dimension
| Nominal Pipe Size, NPS |
Outside Diameter of Flange, O |
Minimum Thickness of Flange, tf [Notes (2)-(4)] |
Minimum Thickness Lap Joint, tf |
Diameter of Hub, X |
Hub Diameter Beginning of Chamfer Welding Neck, Ah [Note (5)] |
Length Through Hub | Bore | |||
| Threaded/ Slip-on/ Socket Welding, Y |
Lapped, Y |
Welding Neck, Y |
Minimum Slip-on/ Socket Welding, B |
Minimum Lapped, B |
||||||
| 1/2 | 90 | 9.6 | 11.2 | 30 | 21.3 | 14 | 16 | 46 | 22.2 | 22.9 |
| 3/4 | 100 | 11.2 | 12.7 | 38 | 26.7 | 14 | 16 | 51 | 27.7 | 28.2 |
| 1 | 110 | 12.7 | 14.3 | 49 | 33.4 | 16 | 17 | 54 | 34.5 | 34.9 |
| 1 1/4 | 115 | 14.3 | 15.9 | 59 | 42.2 | 19 | 21 | 56 | 43.2 | 43.7 |
| 1 1/2 | 125 | 15.9 | 17.5 | 65 | 48.3 | 21 | 22 | 60 | 49.5 | 50.0 |
| 2 | 150 | 17.5 | 19.1 | 78 | 60.3 | 24 | 25 | 62 | 61.9 | 62.5 |
| 2 1/2 | 180 | 20.7 | 22.3 | 90 | 73.0 | 27 | 29 | 68 | 74.6 | 75.4 |
| 3 | 190 | 22.3 | 23.9 | 108 | 88.9 | 29 | 30 | 68 | 90.7 | 91.4 |
| 3 1/2 | 215 | 22.3 | 23.9 | 122 | 101.6 | 30 | 32 | 70 | 103.4 | 104.1 |
| 4 | 230 | 22.3 | 23.9 | 135 | 114.3 | 32 | 33 | 75 | 116.1 | 116.8 |
| 5 | 255 | 22.3 | 23.9 | 164 | 141.3 | 35 | 36 | 87 | 143.8 | 144.4 |
| 6 | 280 | 23.9 | 25.4 | 192 | 168.3 | 38 | 40 | 87 | 170.7 | 171.4 |
| 8 | 345 | 27.0 | 28.6 | 246 | 219.1 | 43 | 44 | 100 | 221.5 | 222.2 |
| 10 | 405 | 28.6 | 30.2 | 305 | 273.0 | 48 | 49 | 100 | 276.2 | 277.4 |
| 12 | 485 | 30.2 | 31.8 | 365 | 323.8 | 54 | 56 | 113 | 327.0 | 328.2 |
| 14 | 535 | 33.4 | 35.0 | 400 | 355.6 | 56 | 57 | 125 | 359.2 | 360.2 |
| 16 | 595 | 35.0 | 36.6 | 457 | 406.4 | 62 | 64 | 125 | 410.5 | 411.2 |
| 18 | 635 | 38.1 | 39.7 | 505 | 457.0 | 67 | 68 | 138 | 461.8 | 462.3 |
| 20 | 700 | 41.3 | 42.9 | 559 | 508.0 | 71 | 73 | 143 | 513.1 | 514.4 |
| 24 | 815 | 46.1 | 47.7 | 663 | 610.0 | 81 | 83 | 151 | 616.0 | 616.0 |
Hastelloy C22 VS Hastelloy C276
Hastelloy C22 flanges and Hastelloy C276 flanges are both high-performance nickel-based alloys, but they differ in their chemical composition and performance in specific corrosive environments. In summary, Hastelloy C22 has a higher chromium content, making it generally more resistant to strong oxidizing media and localized corrosion than C276, particularly in the heat-affected zone of welds. Hastelloy C276, on the other hand, contains higher levels of molybdenum and tungsten, making it more effective in highly reducing media and under high-temperature conditions.
You can get an offer for products in below material forms:
-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）
Hastelloy C22 Flanges Exported Countries
We Export Hastelloy C22 Flanges 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