Hastelloy C4 (UNS: N06455)
| Bellows Materials | Hastelloy C4 |
| Trade Name | Hastelloy C4 |
| Description | A Nickel-Chromium-Molybdenum alloy with outstanding high temperature stability. |
| Application Notes | It has high ductility and corrosion resistance. It’s high temperature resistance up to 1900 °F (1038 °C) makes it suitable for most chemical process application in the “as” welded condition. Resistant to chloride induced stress corrosion cracking |
| Industry Uses /Products | Chemical processing equipment, nuclear fuel processing |
| UNS | N06455 |
| Specifications | ASTM B |
Material Properties
| Density, ρ, lbs/in^3 | 0.312 |
| Yield Strength, Sy, Psi | 40000 |
| Tensile Strength, Su, Psi | 100000 |
| Elongation % | 40 |
| Youngs Modulus, E psi | 30800000 |
| Coeff. Thermal Expansion, in/in/˚F | 0.0000108 |
Alloy C22 (UNS: N06022)
| Bellows Materials | Alloy C22 |
| Trade Name | Hastelloy C22 |
| Description | A nickel-chromium-molybdenum alloy with good resistance to both oxidizing and non-oxidizing chemicals, and protection from pitting, crevice attack, and stress corrosion cracking. |
| Application Notes | Its high chromium content provides much higher resistance to oxidizing media than the family standard, C-276 alloy, and imparts exceptional resistance to chloride-induced pitting, to which the stainless steels are prone. |
| Industry Uses /Products | Typical chemical process industry (CPI) applications include reactors, heat exchangers, and columns. |
| UNS | N06022 |
Chemical Compostion, %
| Nickel, Ni | 56 |
| Molybdenum, Mo | 13 |
| Chromium, Cr | 22 |
Alloy C276(UNS: N10276)
| Bellows Materials | Alloy C276 |
| Trade Name | INCONEL® alloy C-276, Hastelloy® C-276 alloy |
| Description | A nickel-molybdenum-chromium-tungsten alloy with excellent corrosion resistance and good fabricability. |
| Application Notes | Nickel Alloy C-276 is a good candidate for most chemical and petrochemical processing applications in the as-welded condition.It has excellent resistance to reducing acids, sulfuric acid, hydrochloric acid, brine solutions, oxidizing chlorides, and hot seawater. Hastelloy C-276 is also one of the few materials resistant to wet chlorine gas, hypochlorite and chlorine dioxide. This particular nickel alloy has exceptional resistance to crevice corrosion and stress corrosion cracking, as well as chloride pitting. It’s low carbon content minimizes carbide precipitation during welding preserves its excellent resistance to corrosion during welding. |
| BSI Products | Bellows |
| UNS | N10276 |
| Specifications | ASTM B, ASME SB- |
Material Properties
| Density, ρ, lbs/in^3 | 0.321 |
Chemical Compostion, %
| Iron, Fe | 5 |
| Nickel, Ni | 57 |
| Molybdenum, Mo | 16 |
| Chromium, Cr | 16 |
| Manganese, Mg | 1 |
| Cobalt | 2.5 |
| Tungsten, T | 4 |
| Copper, Cu | 0.5 |
Other Comments
While it does have good oxidation resistance up to 1800°F, Hastelloy alloy C-276 is generally not recommended for elevated temperature service.