What is the difference between Inconel 600 and Hastelloy C276?
What is the difference between Inconel 600 and Hastelloy C276?
Inconel 600 excels in high-temperature strength and oxidation resistance (oxidizing environments), while Hastelloy C-276, due to its high molybdenum content, exhibits superior corrosion resistance in highly corrosive, reducing, or mixed chemical environments, particularly excelling in resistance to pitting and crevice corrosion. Inconel 600 is suitable for high-temperature applications such as furnaces, while Hastelloy C-276 is suitable for chemical processing, marine, and oil/gas industries where highly corrosive chemicals (acids, chlorides) are present.
What are the uses of Hastelloy C276?
Hastelloy C-276 is widely used in a variety of harsh environments, such as chemical processing, pollution control, pulp and paper production, industrial and municipal waste treatment, and acidic natural gas recovery.
Chemical composition of Inconel 600 and Hastelloy C276
| Element | Inconel 600 (UNS N06600) | Hastelloy C276 (UNS N10276) |
|---|---|---|
| Nickel (Ni) | ≥ 72.0 % | ≥ 57.0 % (Balance) |
| Chromium (Cr) | 14.0 – 17.0 % | 14.5 – 16.5 % |
| Iron (Fe) | 6.0 – 10.0 % | 4.0 – 7.0 % |
| Molybdenum (Mo) | – | 15.0 – 17.0 % |
| Tungsten (W) | – | 3.0 – 4.5 % |
| Cobalt (Co) | – | ≤ 2.5 % |
| Carbon (C) | ≤ 0.15 % | ≤ 0.01 % |
| Manganese (Mn) | ≤ 1.0 % | ≤ 1.0 % |
| Silicon (Si) | ≤ 0.5 % | ≤ 0.08 % |
| Copper (Cu) | ≤ 0.5 % | – |
| Aluminum (Al) | – | – |
| Titanium (Ti) | – | – |
| Vanadium (V) | – | ≤ 0.35 % |
| Phosphorus (P) | – | ≤ 0.04 % |
| Sulfur (S) | ≤ 0.015 % | ≤ 0.03 % |
inconel 600 and hastelloy c276 Mechanical Properties
| Physical Property | Inconel 600 | Hastelloy C276 |
|---|---|---|
| Density (g/cm³) | 8.47 | 8.89 |
| Melting Range (°C) | 1370 – 1425 | 1325 – 1370 |
| Modulus of Elasticity (GPa) | 214 | 205 |
| Thermal Conductivity (W/m·K, at 20°C) | 14.8 | 11.1 |
| Coefficient of Thermal Expansion (×10⁻⁶/K, 20–100°C) | 13.3 | 11.2 |
| Electrical Resistivity (μΩ·m, at 20°C) | 1.02 | 1.30 |
| Specific Heat (J/kg·K, at 20°C) | 444 | 427 |
| Magnetic Permeability | Typically non‑magnetic | Typically non‑magnetic |
| Poisson's Ratio | 0.29 | 0.30 |
| Thermal Diffusivity (mm²/s, at 20°C) | ~3.5 | ~2.9 |
Inconel 600 vs. Hastelloy C276 – Corrosion Resistance
Both alloys are renowned for their excellent corrosion resistance, but they excel in different environments. Inconel 600 exhibits exceptional resistance to oxidation and corrosion in high-temperature oxidizing atmospheres, making it suitable for applications such as furnace components and heat treatment equipment.
On the other hand, Hastelloy C276 demonstrates superior corrosion resistance in reducing environments and corrosive chemicals, including hydrochloric acid, sulfuric acid, and hydrogen sulfide. Its unique composition allows it to withstand even the most corrosive environments, making it a preferred material for chemical processing, pulp and paper manufacturing, and waste treatment facilities.
Inconel 600 vs. Hastelloy C276 – Applications
The different properties of Inconel 600 and Hastelloy C276 determine their applications in different industrial sectors. Inconel 600 is commonly used in the oil and gas industry, nuclear power plants, and aerospace, where extremely high-temperature resistance is required. It maintains good mechanical properties even at high temperatures, making it suitable for components exposed to extreme heat.
On the other hand, Hastelloy C276 is widely used in the chemical industry, pulp and paper industry, and marine environments. Its excellent corrosion resistance in reducing environments and corrosive chemicals makes it the material of choice for equipment and pipelines handling corrosive media.
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.