Gnee Steel is a company specializing in the production of Hastelloy C276 alloy products, Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy 800, Incoloy 800H/HT, Incoloy 825, Monel 400, Monel K500, and other high-temperature alloy materials. We specialize in the production and sales of alloy materials. Gnee Steel's products are widely used in aerospace, chemical, power generation, automotive, nuclear energy, and other fields, and we can provide customized alloy material solutions according to customer needs.
Incoloy 825 vs Hastelloy C276 Alloy
Incoloy 825 vs Hastelloy C276 Alloy
Hastelloy C276 and Incoloy 825 are both high-performance nickel-based corrosion-resistant alloys, but they have significant differences in composition and applications: Hastelloy C276 (high molybdenum/tungsten content) offers excellent corrosion resistance to severe pitting and reducing acids, while Incoloy 825 (high iron/nickel/chromium content) excels in general corrosion resistance, stress corrosion cracking resistance, and resistance to moderately concentrated acids at a lower cost.
What are the equivalent materials for Hastelloy C276?
Hastelloy C276 Equivalent Materials
Hastelloy C276 is a corrosion-resistant alloy, and its equivalent materials include UNS N10276, WNR 2.4819, and ASTM B622. These materials exhibit similar resistance to corrosive chemicals and high temperatures.
What is Incoloy 825?
Incoloy 825 is a nickel-iron-chromium alloy with additions of copper, molybdenum, and titanium. It exhibits excellent corrosion resistance in both acidic and alkaline environments, making it ideal for use in various industries such as petrochemicals, nuclear reactors, offshore oil and gas production, and marine applications. In addition to its superior corrosion resistance, Incoloy 825 also possesses good heat resistance and excellent strength over a wide temperature range.
What is Hastelloy C276?
Hastelloy C276 is an alloy that offers corrosion resistance in a wide range of environments, making it suitable for various industrial applications. It also possesses excellent strength and toughness, making it suitable for high-temperature applications.
Chemical composition of Incoloy 825 and Hastelloy C276
| Element | Incoloy 825 | Hastelloy C276 | Impact on Properties |
|---|---|---|---|
| Nickel (Ni) | 38.0 – 46.0% | ≥ 57% | Higher Ni in C276 enhances general corrosion resistance and ductility. |
| Iron (Fe) | ≥ 22.0% | 4 – 7% | Higher Fe in 825 improves strength and oxidation resistance. |
| Chromium (Cr) | 19.5 – 23.5% | 14.5 – 16.5% | Higher Cr in 825 favors oxidation resistance; C276 optimized for combined oxidizing and reducing environments. |
| Molybdenum (Mo) | 2.5 – 3.5% | ≥ 15% | Much higher Mo in C276 gives superior resistance to pitting and crevice corrosion. |
| Copper (Cu) | 1.5 – 3.0% | ≤ 0.5% | Cu in 825 enhances resistance to reducing acids; negligible in C276. |
| Titanium (Ti) | 0.6 – 1.2% | Not significant | Ti in 825 stabilizes against intergranular corrosion; absent in C276. |
| Carbon (C) | ≤ 0.05% | ≤ 0.01% | Lower C in C276 reduces carbide precipitation, improving weldability and corrosion resistance. |
Mechanical Properties: Incoloy 825 vs Hastelloy C-276
| Property | Incoloy 825 (Annealed) | Hastelloy C-276 (Annealed) |
|---|---|---|
| Tensile Strength, Ultimate | 586 MPa (85 ksi) | 690 MPa (100 ksi) |
| Tensile Strength, Yield (0.2% Offset) | 241 MPa (35 ksi) | 283 MPa (41 ksi) |
| Elongation at Break | 30% | 40% |
| Reduction of Area | 50% | 50% |
| Hardness, Rockwell B | 78 HRB | 87 HRB |
| Hardness, Brinell | 160 HB | 190 HB |
Corrosion Resistance of Incoloy 825 and Hastelloy C276
Both Incoloy 825 and Hastelloy C276 are known for their excellent corrosion resistance. Incoloy 825 is best suited for environments containing sulfuric and phosphoric acids. In contrast, Hastelloy C276 is more suitable for brine, marine, and chemical environments containing chlorides and other halides. Generally, Hastelloy C276 offers superior resistance to pitting corrosion, crevice corrosion, and stress corrosion cracking, making it an ideal choice for critical applications.
Applications of Incoloy 825 and Hastelloy C276
Due to their excellent corrosion resistance and mechanical properties, Incoloy 825 and Hastelloy C276 are widely used in various industries, including chemical processing, oil and gas, desalination, and offshore drilling. Incoloy 825 is commonly used in heat exchangers, storage tanks, and pipe valves. On the other hand, Hastelloy C276 is more suitable for high-temperature and highly corrosive applications, such as reactors, chemical equipment, and flue gas desulfurization systems.
Conclusion
Incoloy 825 and Hastelloy C276 are among the most versatile and widely used alloys across various industries. When choosing between these two alloys, specific application requirements such as chemical corrosion, temperature, and mechanical stress must be considered. Generally, Hastelloy C276 is a better choice for demanding applications requiring superior corrosion resistance and mechanical properties, while Incoloy 825 is more suitable for handling milder environments. Ultimately, the choice of alloy depends on a cost-benefit analysis for the specific application.
Gnee Steel is a professional manufacturer of various nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel Alloy 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy Alloy 800, Incoloy 800H/HT, Incoloy 825, Monel Alloy 400, Monel K500, and high-temperature alloys. We specialize in the production and sales of alloy materials. Gnee Steel's products are widely used in aerospace, chemical, power, automotive, and nuclear energy industries, and we can provide customized alloy material solutions according to customer needs. For alloy material price inquiries or to request customized alloy material solutions, please feel free to contact us at ru@gneesteelgroup.com for a quote.