Overview
Composition
| Alloy Type | Nickel (Ni) | Chromium (Cr) | Molybdenum (Mo) | Iron (Fe) | Other Significant Elements |
|---|---|---|---|---|---|
| Hastelloy Alloy | High Content | Moderate to High | Significant | Low to Moderate | Cobalt, Tungsten, Manganese, Copper, Silicon, etc. |
| Example: Hastelloy C-276 | ~52% | ~14.5-16.5% | ~15-17% | Present but low | Small amounts of Cobalt, Tungsten, etc. |
| Inconel Alloy | Moderate to High | Moderate to Low | Variable | Significant | Aluminum, Titanium, Cobalt, etc. (depending on the grade) |
| Example: Inconel 600 | ~75% (Ni + Fe, with Ni being the majority) | ~15% | ~<1% | ~8% (balance with Ni) | Aluminum, Titanium, etc. |
| Example: Inconel 625 | ~58% | ~20-23% | ~8.5-10.5% | ~Balance | Aluminum, Titanium, Niobium, etc. |
- Hastelloy Steel Alloy: Primarily consists of nickel (Ni), chromium (Cr), molybdenum (Mo), and sometimes iron (Fe), copper (Cu), or tungsten (W) to enhance specific properties. It is categorized into two main types: nickel-chromium alloys and nickel-chromium-molybdenum alloys.
- Inconel Steel Alloy: Typically includes nickel as the base element, combined with chromium, iron, and other alloying elements such as niobium (Nb), titanium (Ti), and aluminium (Al) to achieve high strength and corrosion resistance. For instance, Inconel 718 is hardened by the precipitation of secondary nickel-(aluminium, titanium, niobium) phases.
Corrosion Resistance
- Hastelloy Steel Alloy: Renowned for its exceptional corrosion resistance to various media, including acids, bases, salts, and oxidants. Specific grades like Hastelloy C-276 are among the few materials resistant to wet chlorine, hypochlorites, and chlorine dioxide solutions.
- Inconel Steel Alloy: Also exhibits good corrosion resistance, particularly at high temperatures. It is designed to withstand both high-temperature oxidation and corrosion in aggressive environments, making it suitable for aerospace and oil industry applications.
Application Fields
- Hastelloy Steel Alloy: Due to its unique combination of properties, Hastelloy alloys are indispensable in various demanding industrial applications. They are widely used in chemical and petrochemical industries for equipment and components exposed to corrosive chemicals, such as reactors, heat exchangers, and valves. They are also employed in marine engineering, energy production, environmental protection equipment, aerospace, electronics, and semiconductor industries.
- Inconel Steel Alloy: Initially developed for the aerospace industry, Inconel alloys are now widely used in various fields due to their excellent strength and corrosion resistance. They are commonly found in aircraft engine components, gas turbines, and high-strength applications in the aerospace and power generation industries. In the oil industry, they are used for gate valves, choke stems, fasteners, and other critical components.
What is Hastelloy Alloy?
Hastelloy alloy is a special nickel-based corrosion-resistant alloy, which is mainly divided into two categories: nickel-chromium alloys and nickel-chromiumolybdenum alloys. It has good corrosion resistance and thermal stability, so it has been widely used in many harsh industrial environments.
What is Inconel Alloy?
Inconel alloy belongs to the austenitic nickel-chromium-based superalloy series. The chromium-nickel-iron alloys are Alloy 718 (Inconel 718, UNS N07718, 2.4688), Alloy 625 (Inconel 625, UNS N06625, 2.4856), and their higher-strength Alloy 725 (Inconel 725, UNS N07725).
Pharmaceutical Industry Needs
The pharmaceutical industry has specific needs when it comes to materials, and Inconel alloy, known for its corrosion resistance, high-temperature strength, and excellent mechanical properties, can meet these needs in certain applications. Inconel alloy can meet the specific needs of the pharmaceutical industry in various applications due to its corrosion resistance, high-temperature strength, and excellent mechanical properties. However, its use should be carefully considered based on cost, fabrication requirements, and regulatory compliance.
In Conclusion
In summary, while both Hastelloy metal alloy and Inconel metal alloy are nickel-based and possess high-performance characteristics, they differ in composition, corrosion resistance, and application fields. Hastelloy alloys are noted for their superior corrosion resistance in diverse media, making them ideal for chemical processing and marine environments. In contrast, Inconel alloys are designed for high strength and corrosion resistance at elevated temperatures, making them suitable for aerospace and oil industry applications.