The corrosion-resistant Hastelloy alloys are widely used by the chemical processing industries. The need for reliable performance leads to their acceptance and growth in the areas of geothermal, solar energy, oil and gas and pharmaceutical. The benefits of Hastelloy process equipment include high resistance to uniform attack, outstanding localized corrosion resistance, excellent stress corrosion cracking resistance, and ease of welding and fabrication. Hastelloy B-3 alloy possesses outstanding resistance to non-oxidizing acids, such as hydrochloric acid and sulfuric acid. The advantages of B-3 alloy over previous B-family alloys are enhanced thermal stability and improved fabrication characteristics. The recently developed Hastelloy Hybrid-BC1, will handle stronger non-oxidizing acids than C-type alloys and will tolerate oxidizing impurities that B-type alloys will not.Hastelloy serves many different applications in these industry categories: •Chemical Process •Petrochemical •Oil & Gas •Pharmaceutical •Geothermal •Sea Water •Water Desalination •LNG (Liquefied Natural Gas) •Biomass •Mining •Utilities •Nuclear Power •Solar PowerHastelloy C-22 alloy is particularly resistant to pitting and crevice corrosion; it has been used extensively to protect against the most corrosive FGD systems and the most sophisticated pharmaceutical reaction vessels. Hastelloy C-4 alloy High-temperature stability in the 1200-1900°F (650-1040°C) range as evidenced by good ductility and corrosion resistance. Virtually the same corrosion resistance as alloy C-276. Hastelloy C-22 alloy is better overall corrosion resistance in oxidizing corrosives than C-4, C-276 and 625 alloys. Outstanding resistance to localized corrosion and excellent resistance to stress corrosion cracking. Best alloy to use as universal weld filler metal to resist corrosion of weldments. Hastelloy C-276 alloy Versatile, corrosion resistant alloy. Very good resistance to reducing, and mildly oxidizing corrosives. Excellent stress corrosion cracking resistance with very good resistance to localized attack.| Item | HC-276 | C-22 | C-4 | B2 | B3 | N |
| C | ≤0.01 | ≤0.015 | ≤0.015 | ≤0.02 | ≤0.01 | 0.04-0.08 |
| Mn | ≤1 | ≤0.5 | ≤1 | ≤1 | ≤3 | ≤1 |
| Fe | 4-7 | 2-6 | ≤3 | ≤2 | ≤1.5 | ≤5 |
| P | ≤0.04 | ≤0.02 | ≤0.04 | ≤0.04 | -- | ≤0.015 |
| S | ≤0.03 | ≤0.02 | ≤0.03 | ≤0.03 | -- | ≤0.02 |
| Si | ≤0.08 | ≤0.08 | ≤0.08 | ≤0.1 | ≤0.1 | ≤1 |
| Ni | rest | rest | rest | rest | ≤65 | rest |
| Co | ≤2.5 | ≤2.5 | ≤2 | ≤1 | ≤3 | ≤0.2 |
| Ti+Cu | -- | -- | ≤0.7 | -- | ≤0.4 | ≤0.35 |
| Al+Ti | -- | -- | -- | -- | ≤0.5 | ≤0.5 |
| Cr | 14.5-16.5 | 20-22.5 | 14-18 | ≤1 | ≤1.5 | 6-8 |
| Mo | 15-17 | 12.5-14.5 | 14-17 | 26-30 | ≤28.5 | 15-18 |
| B | -- | -- | -- | -- | -- | ≤0.01 |
| W | 3-4.5 | 2.5-3.5 | -- | -- | ≤3 | ≤0.5 |
| V | ≤0.35 | ≤0.35 | -- | 0.2-0.4 | -- | ≤0.5 |
