Yuhong Group Co.,Ltd
Yuhong Holding Group Co.,LTD
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What is Hastelloy C22?
Hastelloy C22 is a versatile austenitic nickel-chromium-molybdenum-tungsten alloy with enhanced resistance to pitting, crevice corrosion and stress corrosion cracking. The high chromium content provides good resistance to oxidizing media while the molybdenum and tungsten content give good resistance to reducing media. This nickel steel alloy also has excellent resistance to oxidizing aqueous media including wet chlorine and mixtures containing nitric acid or oxidizing acids with chlorine ions. Other corrosives Hastelloy C-22 has resistance to are oxidizing acid chlorides, wet chlorine, formic and acetic acids, ferric and cupric chlorides, sea water, brine and many mixed or contaminated chemical solutions, both organic and inorganic.
This nickel alloy also offers optimum resistance to environments where reducing and oxidizing conditions are encountered in process streams. This is beneficial in multi- purpose plants where such “upset” conditions occur frequently. This nickel alloy resists the formation of grain-boundary precipitates in the weld heat-affected zone, thus making it suitable for most chemical process applications in the as-welded condition. Hastelloy C22 can't be used in service temperatures above 1250° F due to the formation of detrimental phases which form above this temperature.
Characteristics of Hastelloy C22:
Chemical Composition
| Grade | C | Mn | Si | S | Co | Ni | Cr | Fe | Mo | P |
| C22 | 0.010 max | 0.50 max | 0.08 max | 0.02 max | 2.50 max | 50.015 min* | 20.00 – 22.50 | 2.00 – 6.00 | 12.50 – 14.50 | 0.02 max |
Mechanical Properties
| 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 Grade
| STANDARD | WERKSTOFF NR. | UNS | JIS | GOST | EN | OR |
| Hastelloy C22 | 2.4602 | N06022 | NW 6022 | – | NiCr21Mo14W | – |
Surface Treatment Options
| BPE Surface Finish Code
| CSI Surface Finish Code
| Product Contact Surface (Max Ra)*
| Product Contact Surface Finish Treatment (ID)
| Non-Product Contact Surface (Max Ra)
| Non-Product Contact Surface Finish Treatment (OD)
| Dimensions & Tolerances (BPE) or (CSI)
|
|---|---|---|---|---|---|---|
| SF1 | PL | 20 µ-inch (0.51 µm) | Mechanical Polish/As Drawn | 32 µ-inch (0.81 µm) | Mechanical Polish | BPE |
| SF5 | PO | 20 µ-inch (0.51 µm) | Electropolished | 32 µ-inch (0.81 µm) | Mechanical Polish | BPE |
| SF6 | P25 | 25 µ-inch (0.64 µm) | Electropolished | 32 µ-inch (0.81 µm) | Mechanical Polish | BPE |
| N/A | PU | Mill Finish | Unpolished/Mill | Mill Finish | Unpolished/Mill | CSI |
Applications:
