About Alloy
Hastelloy G, a member of the Hastelloy alloy family, stands out for its unique composition and properties tailored for demanding industrial applications. Comprised mainly of nickel, chromium, molybdenum, and copper, Hastelloy G offers exceptional resistance to oxidation and localized corrosion, making it ideal for use in environments with high temperatures, aggressive chemicals, and corrosive gases.
This alloy's high nickel content provides excellent strength and ductility, even at elevated temperatures, while chromium enhances its resistance to oxidation. Molybdenum and copper additions further bolster its resistance to corrosion in reducing environments and against localized attack, such as pitting and crevice corrosion.
Applications of Hastelloy G span across diverse industries, including chemical processing, aerospace, power generation, and marine environments. It finds extensive use in components such as reactor vessels, heat exchangers, valves, and piping systems where reliability, longevity, and safety are paramount. Its ability to maintain performance under extreme conditions ensures operational efficiency and durability, making Hastelloy G a preferred choice for critical applications requiring superior corrosion resistance and high mechanical strength.
Product Form
Rod, Bar, Wire and Forgings: ASTM B581, ASME SB581, DIN 17752
Plate, Sheet and Strip: ASTM B582, ASME SB582, DIN 17750, ISO 6208
Pipe and Tube: ASTM B619, ASTM B622, ASTM B626, ASTM B751, ASTM B775, ASTM B829, ASME SB619, ASME SB622, ASME SB626, ASME SB751, ASME SB775, ASME SB829
Forgings
Chemical Composition
| Alloy | C | Si | Mn | P | S | Cr | Ni | Co | Mo | W | Nb+Ta | Cu | Fe |
| Hastelloy G-3 | ≤0.015 | ≤1.00 | ≤1.00 | ≤0.04 | ≤0.03 | 21.0-23.5 | Bal | ≤5.00 | 6.0-8.0 | ≤1.50 | ≤0.50 | 1.5-2.5 | 18.0-21.0 |
Property
| Density, g/cm3 | Melting Point, ℃ | Tensile Strength, MPa | Yield Strength, MPa | ELongation, % | Hardness, HB |
| 8.14 | 1260-1343 | 690 | 321 | 50 | – |
Application
Hastelloy G finds its application in wet flue gas desulfurization process and manufacture of chemical process equipment.
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